PN_072 0228_Apple_Service_Technical_Procedures_Macintosh_Family_Volume_One Mar_1992 PN 072 0228 Apple Service Technical Procedures Macintosh Family Volume One Mar 1992

PN_072-0228_Apple_Service_Technical_Procedures_Macintosh_Family_Volume_One-Mar_1992 PN_072-0228_Apple_Service_Technical_Procedures_Macintosh_Family_Volume_One-Mar_1992

User Manual: PN_072-0228_Apple_Service_Technical_Procedures_Macintosh_Family_Volume_One-Mar_1992

Open the PDF directly: View PDF .
Page Count: 395

Download
Open PDF In Browser	View PDF

--...._.............
,::;:::::...~

• • • • • " :h-

••
m
'~

Apple Service
Technical Procedures
Macintosh Family
Volume One

:•••••••••••••••
::::::: :".~.".~.~.::-:.,

.•••••••••••••••
....•.....••..

....
.•..........
......••....•..•.
•••••••••••••••
•••••••••••••••••
•••••••••••••••••
•••••• ••••••••••
~

..•....••........
........
........
.......
.....

........•••l'··

...•••...

\...

....J

'-'
Macintosh Computers

DRAM SIMMs
for CPUs
Service Exchange Modules
661-0402 256K, PlCC, 120 ns

•

..J

661-0402 256K, DIP, 120 ns

661-0402 256K, SOJ, 120 ns

661-0494 256K, DIP, 120 ns

661-0519 256K, SOJ, 80 ns

'0 '0

••
••
••
••
••

••
••
••
••
••
[1]
••
•• ••
~

5
505

54
~O ,p'",p'",Q"p'"",~o I 40
4

DRAM SIMMs
for CPUs
Service Exchange Modules

•::s

::s ::s
~ ~ ~ 0 0

=
u

.. ..

~ §

'i 'i

5: 0 0

~
W

~ ~

i 'I
;g <5 <5

661-0403 1 MB, SOJ, 120 ns

••
~O "",s;;2"" ",S2, ° 1C:;~:J • •
~o 1I1I1~1I11I1I1S2.IO II::~:: ":~:I • •
fr:~,]"~:~:,:',a~,,n: I:0: • •
~O """,E"E""" 01 C~:: '::'1 • •
~O ,p',P',g"g"R,R,P',P', °1 0 • •
~O "",Si2""Si2"" °1 C~:: :::: 1 • •
661-0646 512K, SOJ, 80 ns

~O ,o.,o',o',Q"O"O"O"o',o 1 59

661-0402 256K, SOJ, 120 ns

~ §

0
'i
(f)
I)
::s .! .! w W 0
U) U)

Macintosh Computers

•
•
•
•
•
•
•••
• •

Slowest Acceptable DRAM speed (ns)

150 120 100 150 120 100 120 120 80 100 120 80 80 80

[ ] Can be installed only in SIMM positions 3 and 4 because of space constraints.

~ Can be installed only in SIMM Bank A because of space constraints.

~o P"QgQgQ,Q"Q 01 505 • •
5

• • •• •

661-0410 1 MB, DIP, 120 ns

~o ~"~,U~,~DD,,~,, 01 aDa •• m • • •
505
~o ,QUO.D"Q,O,O,~, 01 • • • • • • • • • • • • •
~

661-0520 1 MB, SOJ, BO ns

661-0546 1 MB, SOJ, BO ns, Parity

~o ~U~U~U~,Q~ol :0: ~ ~ ~ ~ ~ ~ ~ ~

•

661-054B 1 MB, SOJ, BO ns, 64-Pin

~Op~~p~,P~P,o
.
661-0719 1 MB, SOJ, 80 ns

505
5

•

• ••
~o Q"P'"P',Q,,",~, 40 4 • •
~o

~~IIIIIIIIIIIIO
II

II.

11111

II,

I::::::::J
5
505
5

661-0643 2 MB, SOJ, 80 ns

Slowest Acceptable DRAM speed (ns)

~The SIMM

•• • • •

• •

150 120 100 150 120 100 120 120 80 100 120 80 80 80

is compatible with the CPU, but the CPU does not use the parity feature of this SIMM.

See other side of Quick Reference: SIMM Compatibility for DRAM SIMMs in laserWriter,
Video Display SIMMs, and Finished Goods Only.

©198B-1992 Apple Computer, Inc. Apple, the Apple logo, laserWriter, and Macintosh are registered trademarks of Apple Computer, Inc. Macintosh Quadra is a trademark of Apple Computer, Inc.
Classic is a registered trademark licensed to Apple Computer, Inc.

rev Mar 92

Quick Reference: SIMM Compatibility

\..,

"-'
Macintosh Computers

DRAM SIMMs for CPUs
Finished Goods Only

tn
j

("")

ii: (3 (3 tn tn

...J

)(

:5 ~

g "-g

~ ,DllllO,ODlID.. sOs •

[1]

~o D.OlllJllDDlJa I

505
5

661-0402 256K, PLCC, 120 ns

•

11...J-

150 120 100 150 ~20 100 120 120 80 100 120 80

sOs
4

80 80

661-0402 256K, SOJ, 120 ns

~ Apple substitutes a compatible service exchange module for finished-goods
SIMMs. You will not receive a finished-goods SIMM as a service exchange module.

661-0402 256K, SOJ, 120 ns

Macintosh Computers

~I~tn

tnltn
j
II

......

1ll1ll11ll1l1ll1l1l1l1l_1I1111111111111111111111111111

661-0609

D···· 14
.

256K, VRAM, 100 ns

~,.bi ';'I1:, : ,:l,:wl w,u ~,bi i 'i l l l l !1 "Do
661-0610

•
•

1 MS, DRAM, 100 ns

~ ~~.~ r-;-,~ 50·'5
661-0722

5 .•.. 5

11111 II lii:1ll1ll11ll1ui--

£E ~ g

:=
II

...J

1111

II::

...

-G)

11=

C"'a:
5~1o~1z 5~O
tn ... tn

tn ...
"'G)
G)tn

11.11
...J

~iz

11. as
...J

•
•
•
•
•

661-0520 1MS, DRAM, 80 ns

661-0441 256K, DRAM, 120 ns

256K, VRAM, 80 ns

~ ~;";;~;;:::~D
:lIIii~A; Ull l l r,1I D!;:T:'~120D20
nO

661-0445 1MS, DRAM, 120 ns

D~D~~

UU II 1111111 11111 IHIlIlIllIrlU;' 1111111 II II II 1111 Uilil

)(

~=
... ~

...

-G)

661-0519 256K, DRAM, 80 ns

661-0649 512K, VRAM, 100 ns
°L.......::.....DL.......::.....L.......::.....~ 14

W
0
it (3 (3 tn
tn ...J

~r--1br--1br--1D~1

I Cards

0
0

Video Display SIMMs

-~
II::
C)

•
•
~o "" ,S2. ",S2, 01 ~::::::::: :'
~O 11111S,2IIIIIIII~O I I::::: :::::,
•
5
50
~o IIII,DIIIIIIIIIIIIIIIIII,QII' 0I
•
•
~o II,EIIEII II II 01 I::::: :::::1
il~l~ IIII~IIII~IIIOJ I::::: :::::,
;g
•
5 • •
50
~o p',Up...o..O..o..O,~ I
.1.1.
5
50
•
~o ~~ ~~ ~ ~ ~ ~o
• ~°UIIIQuD,uQ",P. QIIIQuDIIIQIII~..J sOs •
•1.1. ~~ 1I1 I~1~1:1 I1I1I~1I~1I1 I1I1~I1I~1I1I1I1~I1:1I1I1I1~~1I~1I1 1 ~II c::: ::::J
~o ,0, ,0, ,P',Q"O,,,O,,,O,,Uo 1

661-0402 256K, SOJ, 120 ns

[1J Can be installed only in SIMM positions 3 and 4 because of space constraints.

...

~><
"'1-

1111

Slowest DRAM speed required (ns)

661-0402 256K, DIP, 120 ns

661-0403 1 MS, SOJ, 120 ns

)(

661-0402 256K, DIP, 120 ns

... '0II...

"iii "iii

...

.!o .!
tn

DRAM SIMMs
in
LaserWriter Printers

•

661-0734 1MS, SOJ 80 ns, 72-Pin

•

" Quick Reference: SIMM Compatibility'

•

..J

'-"
Macintosh Computers

DRAM SIMMs
for CPUs
Service Exchange Modules

:::J

~ §
...as t!
'0

'iii
tn
.!! .!!

ii: 0 0
661-0402 256K, PLCC, 120 ns

Macintosh Computers

w
U)

..J

~ ~

DRAM SIMMs
for CPUs
Service Exchange Modules

as i
:::J :::J
0 0

:::J

'iii
'iii
(f)
(f)
as .!! w

ii: (3 0

~O ,Q,P',Q,Q"O"O"O"p',O 1 5Q5

-- -- -- ~O "",s;?""""S2,O C:;;:J -- -- -- ~o O.DDU~DDD..01 aDa
-- -- -- - ~o .o.D.D.D.DD.~.D 01
~O "",D""""""""",~,,, I -- -- -- o
~O
[~:: ::~:I -- -- -- 10PPPP~~~~0 :0:
~O ,p',P',Q"Q"R,R,P',P', 0 ~O ,,,,,s;;2,,,,S2,,,,
- - - ~o lj"W,,0,0""?,, :o~
~O ,p'",p'",Q"p'"",~o I ~O4
oDDDDDDDDo

50Sltlltll

Itil_1

1_lti

l I-I

1m 1[g]1

ltilti

•
:::J

~o 111I1~1I11I1I1~IOII::~:::::~:1

661-0520 1 MB, SOJ, 80 ns

661-0402 256K, SOJ, 120 ns

50
5
5
5

tiltil_ltilti

:0: Itlltlltlltlltlltlltlltl

661-0402 256K, SOJ, 120 ns

i:::J

661-0410 1 MB, DIP, 120 ns

III1III1III11111111111

661-0402 256K, SOJ, 120 ns

~ = ~ ~ ~ ~ ~ 0

661-0403 1 MB, SOJ, 120 ns

661-0402 256K, DIP, 120 ns

8
"t! I'0t!

661-0546 1 MB, SOJ, 80 ns, Parity

~~~~~~~~

""",E"E,,,,,,, 01

505~~~~~~~~
5

~~.~~

661-0548 1 MB, SOJ, 80 ns, 64-Pin

661-0494 256K, DIP, 120 ns

01a

I] ~

ti ti

661-0719 1 MB, SOJ, 80 ns

661-0519 256K, SOJ, 80 ns

011:::: ::::1

661-0646 512K, SOJ, 80 ns

1 I

ti ti

r
I r
I ""'""".
~
L--.J
11111
11111

11111111111

rm~1

I..-.

Slowest Acceptable DRAM speed (ns)

150 120 100 150 120 100 120 120 80 100 120 80 80 80

II] Can be installed only in SIMM positions 3 and 4 because of space constraints.

tilti

Itl

tiltiltiltilti

661-0643 2 MB, SOJ, 80 ns

I I

Can be installed only in SIMM Bank A because of space constraints.

Slowest Acceptable DRAM speed (ns)

•

150112011001150112011001120112018011001120180180180

~The SIMM is compatible with the CPU, but the CPU does not use the parity feature of this SIMM.
See other side of Quick Reference: SIMM Compatibility for DRAM SIMMs in LaserWriter,
Video Display SIMMs, and Finished Goods Only.

©1988-1992 Apple Computer, Inc. Apple, the Apple logo, LaserWriter, and Macintosh are registered trademarks of Apple Computer, Inc. Macintosh Quadra is a trademark of Apple Computer, Inc.
Classic is a registered trademark licensed to Apple Computer, Inc.
rev Mar 92

Quick Reference: SIMM Compatibility

\..

'-"
...

Macintosh Computers

DRAM SIMMs for CPUs
Finished Goods Only

(,)

'iii 'iii
tn tn
as as

("')

w W 0
it (3 (3 en en -I
~

DRAM SIMMs
in
LaserWriter Printers

~ §
...as ...as

=
=~

~ ~

,- "as "as
~
~

~ ~~'[JJl[~]JJll I aDa •

[1]

• •

Slowest DRAM speed required (ns)

~O ,O"O"p',Q"O"O,Q"p',O I

505

~O "",S,2, "" ",S2, 0I

661-0403 1 MB, SOJ, 120 ns

661-0402 256K, SOJ, 120 ns

~o IIIII~IIIIIIII~O 1

150 120 100 150 120 100 120 120 80 100 120 80 80 80

661-0402 256K, SOJ, 120 ns

[1J Can be installed only in SIMM positions 3 and 4 because of space constraints.
[i] Apple substitutes a compatible service exchange module for finished-goods

~O ",,,D,,,,,,,,,,,,,,,,,,,~,,, 0I

SIMMs. You will not receive a finished-goods SIMM as a service exchange module.

~:::::::::: I
10

I:::::5 :::::1
5

505
5

661-0402 256K, SOJ, 120 ns

I Cards

Macintosh Computers
0

0
.....

Video Display SIMMs

.21~tn

tn
tnltn
~
as

~ 0-I
it (3 (3 en en
tn
as

661-0649 512K, VRAM, 100 ns

•
•

~~I!;;;~~DDDDc=P114D14
\ 11111111111111111111111111_111111111111111111111111111111

661-0609

256K, VRAM, 100 ns

20 20
),"j:i",::""","j"W"w""",,'D~,;
",,,,""""'uij~1 0.

I) l;;;!D
661-0610

1 MB, DRAM, 100 ns

~ ~

;g 0"

il~l~

~O """,E"E""" 01

I::::: 1111'1

1I1I~11I19.11IOI

I:::::5 :::::1
5

661-0519 256K, DRAM, 80 ns

661-0520 1MB, DRAM, 80 ns

505
~o D"Q.o..O,O.o"O,~ I
~o ~~ ~~ ~ ~ ~ ~o 50 •
5

.1.1.

5Q. . 5

1r1l1l1ll1ll1l1l1l1l1l1l1ll1ll'rl1ll1ll1ll1l1l1l1ll1ll1ll1l1l

~IIU;"~:;:;;;£:;~D
0!';;;;;II"(IIj
:;;;~1200'·.•20
\liiII.UIllIIlr-JllIIlIIlnll'

•

'Ii:

...

-Q)

as:t::

•1.1.

...

-Q)

as:t::

•
•
•
•
•
•
• •

-I

•
•
•
•
•

•

. 5

256K, VRAM, 80 ns

as:t::

661-0441 256K, DRAM, 120 ns

in ~c:J£TI]DC:::lr=J;J
661-0722

as
...
as

_G)

S~I- S~o C"'a::
3=>< 3==
03=1"'1- ... ;;;:; tn ... z tn ... en ~iz
==
=z
~=
~= Il.as
Il.as
Il.as
as- j
-1-I

661-0402 256K, PLCC, 120 ns

661-0402 256K, DIP, 120 ns

D,llOLllLO,D] I 505

'Ii: en

...

-I

661-0402 256K, DIP, 120 ns
0

661-0445 1MB, DRAM, 120 ns

~°IllUo.UWIIIQ.. QL QlIIo.UWIIIQIII~..I

505
4

661-0734 1MB, SOJ 80 ns, 72-Pin

~~ 1I1I1~I~1:1I1 I1 ~I1~1I1 1 1~1 :1I1I1I1~I1~1I1I1I1~~1I~1I1I1I~

II
•

c:::5

Quick Reference: SIMM Compatibility

::]
5

•
•

• Apple Technical Procedures

)

Macintosh Family
Volume One

Table of Contents
--Title page (contains build date)
Maclntosh/
Macintosh Plus

)

--Table of Contents
--Basics
(except pages 1.1-1.8)
--Take-Apart
(except page 2.14)
(except pages 2.1-2.7, 2.9, 2.12,
2.15-2.17)
(except pages 2.1, 2.19, 2.20)
(except page 2.13)
(except page 2.18)
--Diagnostics
(except page 3.17)
(except page 3.11)
--Troubleshooting
(except pages 4.2, 4.5)
(except pages 4.1, 4.4-4.7)
(except page 4.9)
(except page 4.8)
--Adjustments
(except pages 5.1, 5.7, 5.9)
(except page 5.8)
(except pages 5.3-5.6)
--Additional Procedures
(except pages 6.22, 6.25)
(except page 6.6)
(except page 6.19)
(except page 6.20)
(except page 6.21)
(except pages 6.23, 6.24)
(except pages 6.1-6.5, 6.7-6.16)
--Illustrated Parts List
(except pages 7.1, 7.18, 7.19)
(except pages 7.3, 7.5, 7.9)
(except page 7.13)
(except page 7.15)

05/90
02/87
03/90
02/87
02/89
03/90
05/90
03/91
01/92
02/87
03/89
09/89
02/87
09/88
09/89
03/91
11/91
02/87
07/89
11/89
05/91
02/87
10/88
11/88
09/88
07/87
07/89
01/90
05/90
04/87
10/88
11/89
08/87
03/92

... Continued on next page

)
Macintosh Family-Volume One

Mar 1992

Main TOC/ 1

Maclntosh/
Macintosh Plus
(Continued)

Macintosh SE and
Macintosh SE/30

Macintosh

Classic and
Classic II

2/MainTOC

(except
(except
(except
(except

page 7.17)
page 7.14)
page 7.15)
pages 7.6, 7.7)

02/89
10/90
08/91
12/91

--Table of Contents
--Basics
(except pages 1.2-1.15)
(except pages 1.1, 1.16)
--Take-Apart
(except pages 2.1, 2.30-2.48)
(except pages 2.2, 2.5-2.7)
(except pages 2.31-2.33)
(except pages 2.37, 2.41)
--Diagnostics
(except pages 4.18, 4.19)
(except page 4.8)
--Trou bl eshooting
(except pages 5.1, 5.3, 5.12)
(except pages 5.7, 5.13)
--Additional Procedures
(except pages 6.1-6.7)
(except pages 6.8, 6.9)
(except pages 6.29-6.31)
(except pages 6.10, 6.15, 6.16, 6.19,
6.21)
(except pages 6.26-6.28)
--Illustrated Parts List
(except page IPL.1)
(except pages IPL.6, IPL.7, IPL.9)
(except page IPL.10)
(except page IPL.16)
(except pages IPL.21, IPL.23,
IPL.25, IPL.30, IPL.31)
(except page IPL.19)
(except pages IPL.2, IPL.3)
(except page IPL.17)
(except pages IPL.11, IPL.13)

06/91
02/89
08/89
03/90
08/89
06/91
03/90
08/91
01/92
08/89
09/89
05/90
01/89
03/89
08/89
01/89
11/90
01/90
08/89

--Table of Contents
--Basics
--Take-Apart
(except pages 2.23, 2.29)
(except page 2.21)
--Adjustments
(except pages 3.1-3.3, 3.5, 3.7)
--Diagnostics
(except pages 4.1, 4.2)

10/91
10/91
10/91
01/92
03/92
10/91
03/92
10/91
03/92

Jan 1992

07/89
04/89
02/89
11/90
08/89
11/89
06/89
02/89
10/91
12/91
01/92
03/92

Macintosh Family-Volume One

(

--Troubleshooting
(except pages 5.3, 5.4)
--Additional Procedures
(except page 6.2)
--Illustrated Parts List
(except page IPL.5-IPL.7)

)

10/91
03/92
10/91
11/91
10/91
12/91

)

)
Macintosh Family-Volume One

Mar 1992

Main TOC/3

(

)

(

It Apple Technical Procedures

)

Macintosh and Macintosh Plus
Technical Procedures
o TABLE OF CONTENTS

)

Section 1 Basics

1.2
1.3
1.3
1.3
1.3
1.3
1.4
1.4
1.4
1.8

Macintosh and Macintosh Plus-Differences
Memory
Disk Capacity
Keyboard
Interfaces
Internal Connections
Theory of Operation Overview
Introduction
Modules and Functions
Keyboard and Keyswitch Identification

Section 2Take-Apart

2.3
2.3
2.6
2.6
2.7
2.9
2.12
2.15
2.17
2.19
2.20

Electrostatic Discharge Prevention
Cover
Discharging the Cathode-Ray Tube (CRT)
Discharge Procedure
Anode Cap
Power/Sweep Board
Logic Board
Cathode-Ray Tube (CRT)
Internal Disk Drive
Chassis
Keyboard

Section 3Diagnostics

3.2
3.2
3.2
3.3
3.5
3.10
3.10
3.11
3.12
3.12
3.14
3.15

Introduction
MacTest
How to Use It
Things to Remember
Backup Procedure
Running MacTest
Materials Required
Pull-Down Menus and Icons
512K
Select Test
Options
Apple

)

... Continued on next page

Macintosh / Macintosh Plus

rev. May 90

Contents / i

Miscellaneous Icons
Running the Diagnostic
Error Codes

Section 3Diagnostics
(continued)

3.16
3.16
3.19

Section 4Troubleshooting

4.2
4.2
4.2
4.2
4.2
4.2
4.3
4.4
4.4
4.5
4.7
4.8

Introduction
General Information
Before You Start
How to Use the Symptom Chart
Exchanging the Logic Board
Exchanging the Power/Sweep Board
Things to Remember
Symptom Chart
Video Problems
Drive Problems
Peripheral Problems
Miscellaneous Problems

Section 5Adjustments

5.2
5.2
5.2
5.3
5.5
5.5
5.5
5.5
5.8
5.8
5.8
5.9

Power/Sweep Voltage Adjustment
Introduction
Materials Required
Voltage Adjustment
Yoke Adjustments
Introduction
Materials Required
Adjustment Procedures
Video Adjustments
Introduction
Materials Required
Adjustment Procedures

6.2
6.2
6.3
6.4
6.7
6.8
6.8
6.9
6.9
6.13
6.14
6.14
6.16
6.16
6.16

Macintosh Plus Kits
Things to Remember
Disk Drive and Logic Board Kits
Macintosh Plus Disk Drive Kit
Macintosh Plus Logic Board Kit
Special Problems
Alternate Chassis Screw Sizes
800K Drive Exchange Compatibility
800K Disk Ejection Problems
Logic Board ROM Upgrade and 400K Drives
Macintosh Plus RAM Upgrades
Logic Board Configurations
ROM Version Compatibility
ROM Upgrades for Enhanced Macintosh Systems
Replacing 512K Logic Boards

Section 6Additional
Procedures

ii / Contents

rev. May 90

Macintosh / Macintosh Plus

(

)

Section 7Illustrated
Parts List

7.3
7.5
7.7
7.9
7.11
7.13
7.15
7.17
7.19

Macintosh External Housing (Figure 1)
Macintosh Plus Chassis and Power Supply
(Figure 2)
Macintosh Exploded View (Figure 3)
Macintosh Keyboard Assembly (Figure 4)
Macintosh Numeric Keypad Assembly (Figure 5)
Macintosh Plus Rear Housing (Figure 6)
Macintosh Plus-Exploded View (Figure 7)
Macintosh Plus Keyboard Assembly (Figure 8)
Service Packaging, 800K/1.4 MB Drives
(Figure 9)

)

©Apple Computer, Inc., 1985-1990. No portion of this document may be reproduced in any form
without the written permission of Apple Computer, Inc.
MacTest, FDHD, and SuperDrive are trademarks of Apple Computer, Inc.

)

Macintosh, Apple, and the Apple logo are registered trademarks of Apple Computer, Inc.

Macintosh / Macintosh Plus

rev. May 90

Contents / iii

(

• Apple Technical Procedures

)

Macintosh and Macintosh Plus
Section 1 - Basics

CONTENTS
1.2
1.3
1.3
1.3
1.3
1.3
1.4
1.4
1.4
1.8

)

J
Macintosh / Macintosh Plus

rev. Mar 90

Basics / 1.1

o MACINTOSH AND MACINTOSH PLUS -

DIFFERENCES

00001 00000000 000
00001 00000000 := ·

RAM

c:=J

MACINTOSH 128K1512K LOGIC BOARD

(

FIGURE 1

IllIWnl1
..

c::J

--c>

c;:>{;Jc>_

~=~iOOD
·(]OOO
a

~nooO= ~6800~O
~.
1.1
MICROPROCESSOR
F

·O·00S20

0000
- _. I ~""!--,,gJU~~

.....................

Gooogl~

MACINTOSH PLUS 1 MEGABYTE LOGIC BOARD

FIGURE 2

1.2/ Basics

(

rev. Mar 90

Macintosh / Macintosh Plus

Memory

Macintosh
I28K or 5I2K bytes RAM
64K bytes ROM

Disk Capacity

Keyboard

Interfaces

Macintosh plus
1 MB RAM

128K ROM
256 bytes of
user-selectable
parameter memory

Macintosh

Macintosh plus

400K bytes per disk
single-sided

800K bytes per disk
double-sided

Macintosh

Macintosh plus

58 key, software mapped

78 key, software
mapped, with
built-in numeric
keypad and
direction keys

The numbers at the left of the list below correspond to
the locations on both Figure 1 (Macintosh) and Figure 2
(Macintosh Plus) unless otherwise noted.
1 Two RS-232/RS-422 serial ports
Macintosh uses D B-9 connectors
Macintosh Plus uses 8-pin DIN connectors
# 2 Mouse interface
# 3 External disk interface
# 4 Synchronous serial keyboard bus
#

Macintosh plus only (Figure 2)
#

Internal Connections

5 Small Computer System Interface (SCSI) port:
an industry-standard interface that provides
extremely high-speed access to hard disks, tape
backup systems, and other mass storage devices.

The connector that runs from the power/sweep board to
the logic board has been moved for the Macintosh Plus,
as shown in Figures 1 and 2, #6.

)
Macintosh / Macintosh Plus

rev. MargO

Basics / 1.3

o THEORY OF OPERATION OVERVIEW
Introduction

Troubleshooting can be approached in many different
ways. Apple recommends two methods in particular:
logical troubleshooting and module swapping in a
particular order for a particular symptom. Most
troubleshooting charts in Apple Service Technical
Procedures manuals are based upon the moduleswapping method, but you can often save repair time by
using logical troubleshooting before you start swapping.
Logical troubleshooting involves knowing the function
of each module in the machine, and using that
knowledge to narrow your search for the problem. This
section will give you the information necessary to
perform logical troubleshooting of the Macintosh and
Macintosh Plus. The information here includes a
description of each module in the Macintosh and
Macintosh Plus and the various functions it performs.
(For definitions of basic terms, refer to Section 4,
Simplified Overview of a Microcomputer System, under
the You Oughta Know tab.)
Unless otherwise noted, all information included here
is the same for the Macintosh and Macintosh Plus.

Modules and Functions

Macintosh modules and their functions are given below:

Main Logic Board

The Macintosh main logic board (Figure 3) is the heart
of the system. It contains the components described
below. A number after an IC in the descriptions that
follow corresponds to a number in the figure to the left
(indicating its general location on the logic board).
The CPU, or 68000 microprocessor, gets instructions
from memory, translates them, and carries them out. It
communicates with all components on the logic board.
The RAM, or storage capability, varies. The Macintosh
can have 128K or 512K. The Macintosh Plus has 1
megabyte of RAM installed on SIMM modules, which
are mounted on the logic board.
The ROMs (1 is HI, 2 is LO-see Figure 3) contain the
operating code for the 68000. The Macintosh ROMs and
the Macintosh Plus ROMs are different. Refer to
Section 6, Additional Procedures, for speCifics.

1.4 / Basics

rev. MargO

Macintosh / Macintosh Plus

)

::i"'~~-~"~~~wrIJ
I':: : : 0·0.,...,

:.:.:.:.:.:.:

c::>

_..,
':'

DoOootJID_

,COi -[: :r---------,
: : : : : ::::::::::::J ODD0
o

00001 00000000 000
00001 00000000 :=j
c::>

000

FIGURE 3
The IWM, or "Integrated Woz Machine" (named after
Steve Wozniak), is a self-contained disk controller card
on one IC. This IC supports both the internal and
external disk drives.

)

The SCC, or serial communications controller, handles
the information received and sent from the two serial
ports on the rear of the machine. The Macintosh has
two nine-pin serial ports. The Macintosh plus has two
eight-pin DIN connectors.
The VIA, or versatile interface adapter, is a dual-port
parallel interface. This IC converts serial data (from
input devices) to parallel data, so that the logic. board
can interpret the information correctly. It provides an
interface for the mouse and the keyboard.
The PALs, or programmable array logic (customized
ICs), replace from five to ten Ies. They perform various
control and synchronizing functions for the rest of the
main logic board.
The oscillator (timing deVice), generates the master
clock pulse. The master clock pulse is broken down
into various timing clocks needed by the ICs on the
main logic board.

)
Macintosh / Macintosh Plus

rev. MargO

Basics / 1.5

Power/Sweep Board

The power/sweep board (Figure 4) is divided into two
sections, described below.

(

FIGURE 4
The speaker and the battery compartment are located on
the power/sweep board. However, all the signals that
operate these components are generated on the logic
board; the power/sweep board does not use either of
these items.
The power supply section is located on the bottom half
of the board. This is where the AC voltage is converted
to DC voltage for use by the entire system.
The sweep section is located on the upper half of the
board. There are circuits for both the horizontal and
the vertical signals that are fed to the CRT. The flyback
transformer is part of the sweep section and delivers
high voltage directly to the CRT through the anode
connector.

CRT

The CRT (cathode-ray tube) provides the highresolution video display. The power/sweep board
connects to the anode to apply high voltage to the CRT.
The power/sweep board connects to the neck and to the
yoke to supply various voltages and signals to the CRT
to create the video display.

1.6/ Basics

rev. Mar 90

Macintosh / Macintosh Plus

(

)

Disk Drives

The internal disk drive connects to the main logic board
through an internally installed connector. The external
drive connects to the port on the back of the logic
board.
Reading and writing operations are controlled by the
IWM on the logic board. The data passes through this
Ie on its way from the logic board to the disk in the
drive, or from the disk drive to the logic board.
The Macintosh has 400K disk drives. The Macintosh
Plus has BOOK disk drives. The 400K disks work on
the BOOK drives. The BOOK disks do not work on the
400K drives.

Mouse

The mouse connects to a nine-pin connector on the main
logic board. The mouse is used to position the cursor
on the screen.
The assemblies inside the mouse send a series of pulses
to the see and the VIA. These Ies interpret and
translate the information so that the logic board can
utilize it.

)
Keyboard

The keyboard connects to the logic board through a
four-wire coil with a telephone-type connector. The
keyboard has its own microprocessor, which is used to
implement a serial bus for communicating with the logic
board.
The keyboard data is sent in serial form to the VIA,
where it is converted into parallel data and translated
so that the logic board can use it.

)
Macintosh / Macintosh Plus

rev. Mar90

Basics / 1.7

o KEYBOARD AND KEYSWITCH IDENTIFICATION

(

The Macintosh keyboard without the numeric keypad
uses Alps keyswitches (Figure 5). The locking
keyswitch is used for the Caps Lock key, the other
keyswitch for all other keys on the keyboard.
The Macintosh Plus keyboard with the numeric keypad
uses two versions of keyswitches, Alps and Mitsumi.
The keyswitches are not interchangeable between
boards. They can be identified by referring to Figure 5
below.
The procedure to replace a keyswitch is in Section 3,
Keyswitch Replacement, under the You Oughta Know
tab.
Note: Macintosh foreign language keyboards use the
same type of keyswitches as the U.S. Macintosh
keyboards.

(
KEYBOARD

KEYSWITCH

661-96154
705-0070
ALPS LONG STEM
("Extended")

705-0077
ALPS ALPHA LOCK
("Alternate Action")

705-0104

705-0044

MITSUMI
KEYSWITCH

MITSUMI
ALPHA LOCK KEYSWITCH

661-0322

:::

·tAr.·. : ·.
1~1

661-0362

FIGURE 5

1.8/ Basics

rev. MargO

Macintosh / Macintosh Plus

Ii Apple Technical Procedures

)

Macintosh and Macintosh Plus
Section 2 - Take-Apart
o CONTENTS
2.3
2.3
2.6
2.6
2.7
2.9
2.12
2.15
2.17
2.19
2.20

)

Electrostatic Discharge Prevention
Cover
Discharging the Cathode-Ray Tube (CRT)
Discharge Procedure
Anode Cap
Power/Sweep Board
Logic Board
Cathode-Ray Tube (CRT)
Internal Disk Drive
Chassis
Keyboard

Note: If a step is underlined, detailed instructions for
that step can be found elsewhere in this section.

)
Macintosh / Macintosh Plus

rev. May 90

Take-Apart / 2.1

(

)

D ELECTROSTATIC DISCHARGE PREVENTION
The Macintosh and the Macintosh Plus contain C-MOS
components, and the Macintosh Plus RAM memory is
installed on four small separate boards called SIMM
modules. Both the C-MOS and the SIMM modules are
very susceptible to ESD damage.
Preventive measures must be taken to avoid ESD
damage. When you are unwrapping, installing, or
replacing any modules, observe the appropriate ESD
precautions.
For complete ESD prevention information, refer to You
Oughta Know, Section 6.

DCOVER

)

Materials Required

Pull-apart tool
IS-inch Torx screwdriver
Soft cloth or foam pad
Small, flat-blade screwdriver
WARNING: Macintosh and Macintosh Plus computers
contain high voltage and a high-vacuum picture tube. To
prevent serious personal injury and property damage, be
sure you read and understand the safety precautions in
Section 8, CRT Safety, under the You Oughta Know tab
before you remove the back cover. Failure to follow the
safety rules could result in serious injury.

Remove

1. Turn the power off and disconnect the AC power
cord from the source and from the back of the
computer.
2.

Disconnect the mouse and all other external ca bI es
from the back of the computer. Disconnect the
keyboard.

)
Macintosh / Macintosh Plus

rev. MargO

Take-Apart / 2.3

(

FIGURE 1
3. Remove the reset!interrupt switch (if installed) by
prying it off with a small flat-blade screwdriver
(Figure 1, #1).
4. Press down the tab at the top of the battery
compartment cover (Figure 1, #2), and pull the tab
toward you.
5. Carefully place the computer face-down on a soft
cloth or foam pad (to prevent scratching the bezel).

6. Use a Torx screwdriver to remove the five screws
(Figure 1, #3).
7.

Use the pull-apart tool to gently pry the cover
loose. Carefully lift up the cover (there is a fragile
picture tube inside), and set it out of the way.

WARNING: The edges of the metal chassis may be
sharp_ When moving the computer with the cover
removed, be sure to handle the metal chassis carefully.

2.4 / Take-Apart

rev. MargO

Macintosh / Macintosh Plus

(

Replace

)

Make sure that the insulating paper is in the proper
position (Figure 2, #1) and that all cables are
connected. Carefully slide the cover back onto the
computer and check to see that it is properly seated.

2. Replace the five screws on the back of the
computer.
3. Replace the battery compartment cover.
4.

Replace the reset/interrupt switch if it was
installed.

•
o

•

)

FIGURE 2

Macintosh / Macintosh Plus

rev. MargO

Take-Apart / 2.5

o DISCHARGING THE CATHODE-RAY TUBE
Materials Required

Safety goggles
Foam pad (ungrounded)
Needlenose pliers
Alligator lead
New CRT discharge tool (part number 076-0381)

(

WARNING: Before starting, read the safety precautions
and the CRT discharge procedure in Section 8, CRT
Safety, under the You Oughta Know tab. Alternative
instructions for discharging the CRT using the older
version of the discharge tool (and/or a screwdriver) are
also given in that section.

Discharge
Procedure

1. Remove your grounding wriststrap and jewelry and
put on safety goggles before beginning!

(

FIGURE 3
2. Attach the alligator clip on the CRT discharge tool
to the metal part of the ground lug (Figure 3, #1).
WARNING: H you discharge the Macintosh CRT to the
metal chassis, the logic board may be destroyed because
its circuitry is grounded to the chassis. You must
discharge to the ground lug!

2.6/ Take-Apart

rev. Mar90

Macintosh / Macintosh Plus

3. Put one hand in your pocket or behind your back
and grasp the insulated handle of the CRT discharge
tool. Insert the probe of the tool under the anode
cap (Figure 3, #2) until it touches the anode ring.

)

4. Remove the probe of the CRT discharge tool from
under the anode cap. Remove the alligator clip from
the ground lug.
Note: The anode can build up voltage over time. To
drain off any residual charges, establish an ongoing
ground by fastening one end of an alligator lead to the
ground lug and the other end to the anode aperture.

Anode Cap

For some procedures, you may have to remove the
anode cap. To do so, peel back the anode cap until you
can see the anode ring (or connector) at the center.
Using needlenose pliers, compress the two prongs on
the connector to free it from the anode aperture.
To replace the anode cap, press together the two prongs
of the anode connector so that you can insert it into the
aperture. Tug on the anode wire to make sure it is
firmly seated, then press down around the edges of the
rubber anode cap to ensure a firm seal.

)

)
Macintosh / Macintosh Plus

rev. MargO

Take-Apart / 2.7

FIGURE 4

(

•
\I

•

FIGURE 5

(

2.8/ Take-Apart

rev. Feb 87
MaCintosh / MaCintosh Plus

)

o POWER/SWEEP BOARD
Materials Required

Pull-apart tool
15-inch Torx screwdriver
Safety goggles
Soft cloth or foam pad
New Apple CRT discharge tool (part number 076-0381)
WARNING: If you are using the older version of the
discharge tool or a screwdriver with alligator leads, see
the precautions in "Discharging the CRT" in Section 8,
CRT Safety, under the You Oughta Know tab.

If a new power/sweep board is installed, perform the
voltage adjustment as shown in Section 5, Adjustments.

Remove

Remove the cover and discharge the CRT to the
ground lug.

WARNING: Make sure the anode has been discharged
before continuing. Failure to discharge the anode could
result In serious Injury. Also, if you discharge the
Macintosh CRT to the metal chassis, the logic board may
be destroyed. You must discharge to the ground lug!

)

Remove the anode cap.

Depress the tab on the yoke cable and unplug it
(Figure 4, #1).

Remove the main logic cable from the power/sweep
board (Figure 4, #2).

Remove the neck connector from the power/sweep
board (Figure 4, #3).

6. Turn the computer upright and remove the screw,
lockwasher, and ground wire at the bottom of the
chassis (Figure 4, #4).
7. There are several versions of the insulating paper
(Figure 5, #1). If there are no access holes for the
three screws (Figure 5, #2), note how the paper is
installed and then remove it.
8.

)
Macintosh / Macintosh Plus

Remove three screws and washers (Figure 5, #2),
and lift up and pull out the power/sweep board.

rev. MargO

Take-Apart / 2.9

(

FIGURE 6

FIGURE 7

(

2.10 I Take-Apart

rev. Feb 87
Macintosh I MaCintosh Plus

Replace

1. Turn the computer upright and position the

power/sweep board at the right hand side of the
chassis.
2. Connect the yoke cable (Figure 6, #1).
3. Connect the main logic cable (Figure 6, #2).
4. Slide the board into the slotted holders (Figure 7,
#1) so that the three screw holes line up with the
holes on the chassis (Figure 7, #2).
5. Connect the CRT socket cable to the power/sweep
board (Figure 6, #3).

6. Replace the ground wire at the bottom of the chassis
using a washer and Phillips head screw (Figure 6,
#4).

7. Replace the three screws and washers (Figure 7,
#2). If replacement screws are needed, refer to
Section 6, Additional Procedures.
8. Replace the insulating paper if it has been removed
(Figure 7, #3).

)

9. Connect the anode connector to the CRT (Figure 6,
#5). Put one prong of the connector in at an angle
and push it against the edge of the anode ring. Then
insert the other prong.
10. Perform the voltage adjustment (refer to Section 5,
Adjustments).
11. Replace the cover.

)
Macintosh / Macintosh Plus

rev. Feb 87

Take-Apart / 2.11

o LOGIC BOARD
Materials Required

(
Pull-apart tool
IS-inch Torx screwdriver
Safety goggles
Soft cloth or foam pad
New Apple CRT discharge tool (part number 076-0381)
WARNING: If you are using the older version of the
discharge tool or a screwdriver with alligator leads, see
the precautions in "Discharging the CRT" in Section 8,
CRT Safety, under the You Oughta Know tab.
Note: If a new logic board is installed, perform the
voltage adjustment found in Section 5, Adjusments.

Remove

Remove the cover and discharge the CRT to the
ground lug.

WARNING: Make sure the anode has been discharged
before continuing. Failure to discharge the anode could
result in serious injury. Also, if you discharge the
Macintosh CRT to the metal chassis, the logic board may
be destroyed. You must discharge to the ground lug!

Remove the main logic cable (Figure 8, #1) and the
disk drive cable (Figure 8, #2) from the logic board.

FIGURE 8

2.121 Take-Apart

rev. Mar 90

Macintosh 1 Macintosh Plus

(

CAUTION: DIP SIMMs, which may be installed on the
logic board, are larger than other RAM SIMMs and can be
easily damaged when removing the logic board. Use
extra care when removing the logic board.

3. Turn the computer face down. Gently slide the main
logic board up and out of the chassis. Pull back
(away from the chassis) on the top of the logic board
while sliding it out so that any installed DIP SIMMs
do not catch on the chassis.

Replace

If you are replacing the logic board of an enhanced S12K
system, or a S12K system with an 800K disk drive, you
must swap ROMs from the customer's faulty logic board
to the replacement logic board. Swapping the ROMs
will ensure that you do not downgrade the customer's
system. For additional information, see "ROM Version
Compatibility" in Section 6, Additional Procedures.

)

FIGURE 9
Note: If you are replacing a bad Macintosh Plus logic
board with a rev. D (or higher) replacement board, you
should install a ground clip (Figure 9, #1) to the inner
plastic lip on the bottom front bezel (below the
keyboard connector opening). You can identify a
revision D replacement board by the part number; the
part number has the format 820-xxxx-D. Do not use the
ground clip with any logic board lower than rev. D.
CAUTION: Contact between the ground Clip and pins or
solder points on the underside of the logic board could
cause a short, resulting in erratic keyboard behavior.
Make sure the clip does not touch any solder points.

)
Macintosh / Macintosh Plus

rev. Mar 91

Take-Apart / 2.13

(

FIGURE 10
1. Gently slide the main logic board into the chassis
until it is firmly seated.
2. Connect the main logic cable (Figure 10, #1) and the
disk drive cable (Figure 10, #2).
3. Perform the voltage adjustment (refer to Section 5,
Adjustments).
4. Replace the cover (be sure the insulating paper is
installed).

2.141 Take-Apart

rev. Feb 89

Macintosh 1 Macintosh Plus

(

o CATHODE-RAY TUBE (CRT)

Materials Required

Pull-apart tool
IS-inch Torx screwdriver
Safety goggles
Soft cloth or foam pad
New Apple CRT discharge tool (part number 076-0381)
WARNING: If you are using the older version of the
discharge tool or a screwdriver with alligator leads, see
the precautions in "Discharging the CRT" in Section 8,
CRT Safety, under the You Oughta Know tab.

Remove

1. Remove the cover and discharge the CRT to the

groundhm·
WARNING: Make sure the anode has been discharged
before continuing. Failure to discharge the anode could
result In serious Injury. Also, if you discharge the
Macintosh CRT to the metal chassis, the logic board may
be destroyed. You must discharge to the ground lugl

)

Remove the power/sweep board.

FIGURE 11
3. Place the computer face-do\vn on a cloth or foam
pad. Remove the four screws that fasten the CRT
(Figure 11, #1) and the ground wire (Figure 11, #2).

)
Macintosh / Macintosh Plus

rev. MargO

Take-Apart / 2.15

(

FIGURE 12
4.

Gently remove the CRT socket cable (Figure 12, #3)
by sliding it straight out from the neck.

WARNING: Handle the CRT by its sides only, not the
neck. Do not touch the anode.
5. Remove the CRT.

WARNING: If you need to dispose of the CRT, refer to
"Disposing of the Cathode-Ray Tube" in Section 8, CRT
Safety, under the You Oughta Know tab.

Replace

Set the CRT in the case with the anode facing away
from the power/sweep board (see Figure 12).

Connect the original CRT socket cable. A new CRT
may have a small retainer on the neck pins. Remove
it before replacing the CRT socket cable.

3. Replace the four CRT screws (Figure 12, #1). Be
sure to reinstall the ground wire (Figure 12, #2).

2.16/ Take-Apart

rev. Mar 90

Macintosh / Macintosh Plus

(

)

o INTERNAL DISK DRIVE
Materials Required

Pull-apart tool
I5-inch Torx screwdriver
Safety goggles
Soft cloth or foam pad
New Apple CRT discharge tool (part number 076-0381)
WARNING: If you are using the older version of-the
discharge tool or a screwdriver with alligator leads, see
the precautions in "Discharging the CRT" in Section 8,
CRT Safety, under the You Oughta Know tab.

Remove

Remove the cover and discharge the CRT to the
Im>und lui:.

)

Remove the main logic board. Verify that the
correct revision of ROM is installed. (Refer to
Section 6, Additional Procedures.)

3. Turn the computer over and place it face down on a
foam pad or soft cloth.
4.

Locate the four Phillips screws that hold the disk
drive and mounting bracket in position. Remove
them from the chassis.

Slide the disk drive out of the chassis.

Note: All 400K drive mechanisms are shipped in their
original internal drive shields. To exchange an BOOK
drive mechanism, you must first remove the drive
mechanism from its original internal drive shield and
install it in the Apple-approved packaging-and-shipping
fixture. You should also install the dummy packing
disk. See Figure 7 in the Illustrated Parts List for
additional information.

)
Macintosh / Macintosh Plus

rev. MargO

Take-Apart / 2.17

IMPORTANT: Remove the plastic dust shield, if there is
one, from the replacement drive before you install the
drive in a Macintosh Plus.

Replace

(

Read "BOOK Diskette Ejection Problems" in Section 6,
Additional Procedures, before replacing the disk drive.
Replacement BOOK disk drive mechanisms should be
installed in the customer's original internal drive
shield. For BOOK drives, you must first remove the
shipping fixture, plastic dust shield (if any), and
packing disk from the replacement drive mechanism
before installing it in the original internal drive shield.
Examine the chassis and determine whether the
mounting holes for the screws are round or oval. Then
perform the appropriate procedure below.

Round
Mounting Holes

Slide the new drive into position.

2. Align the mounting screw holes and tighten the four
screws.
Verify the placement of the disk drive by inserting
a disk into the disk drive and checking that the
disk slides in and out of the drive without rubbing
against the case.
3. Replace the main logic board and cover (be sure the
insulating paper is installed).

Oval
Mounting Holes

Slide the new drive into position.

2. Align the front of the drive with the plastic stops
on the front of the bezel. Insert and tighten the
four mounting screws.
Verify the placement of the disk drive by inserting
a disk into the disk drive and checking that the
disk slides in and out of the drive without rubbing
against the case.
3. Replace the main logic board and cover (be sure the
insulating paper is installed).

2.18/ Take-Apart

rev. Jan 92

Macintosh / Macintosh Plus

(

)

o CHASSIS
Not all Macintosh chassis are designed the same way.
However, the following procedure can be used to
replace any Macintosh or Macintosh Plus chassis.

Materials Required

Pull-apart tool
I5-inch Torx screwdriver
Safety goggles
Small flat-blade screwdriver
Soft cloth or foam pad
New Apple CRT discharge tool (part number 076-0381)
WARNING: If you are using the older version of the
discharge tool or a screwdriver with alligator leads, see
the precautions in "Discharging the CRT" in Section 8,
CRT Safety, under the You Oughta Know tab.

Remove

R~mQv~ th~ ~ov~r

and

diS~harg~ th~

CRT to the

iID>und luK·

)

Remove the Dower/sweep board.

3. Remove the main logic board.
4.

Remove the internal diSk drive.

5. With the computer face-down on a foam pad or soft
cloth, remove the five torx screws that secure the
chassis to the front bezel, and lift out the chassis.

Replace

)
Macintosh / Macintosh Plus

Position the replacement chassis on the front bezel,
and install the five torx screws.

Replace the internal disk drive.

R~Dlac~ th~

Replace the power/sweep board.

main logic board.

rev. May 90

Take-Apart / 2.19

Perform the voltage adjustment (refer to Section 5,
Adjustments) .

(

6. Replace the cover (be sure the insulating paper is
installed).

o KEYBOARD
Exchanging
the Keyboard

If you are exchanging the keyboard, do not remove
the keyboard mechanism. Send the entire unit
(without the cable) in for exchange. The procedure
below is to be used for replacing keyswitches only.

Materials Required

Medium Phillips screwdriver

Remove

Disconnect the keyboard from the Macintosh or
Macintosh Plus.

2. Remove the six screws from the back of the
keyboard. Remove the top plastic cover.
3. Lift the mechanical assembly out of the bottom case.

Replace

Use the replacement procedures for Macintosh
keyswitches in You Oughta Know. To identify the
keyswitches, refer to Section 1, Basics.

Set the mechanical assembly back into the bottom
case.

Position the top plastic cover.

3. Hold the cover in place, turn the keyboard over, and
install the six screws.

2.20/ Take-Apart

rev. May 90

Macintosh / Macintosh Plus

(

)

" Apple Technical Procedures

Macintosh and Macintosh Plus
Section 3 - Diagnostics
o CONTENTS
3.2
3.2
3.2
3.3
3.5
3.10
3.11
3.12
3.12
3.12
3.14
3.15
3.16
3.16
3.19

)

Introduction
MacTest
How to Use It
Things to Remember
Backup Procedure
Running MacTest
Materials Required
Pull-down Menus and Icons
512K
Select Test
Options
Apple
Miscellaneous Icons
Running the Diagnostic
Error Codes

Always use the most recent revision of Mac Test.
Refer to the Apple Seroice Programs Manual for the
number of the latest revision.

Note:

)
Macintosh / Macintosh Plus

rev. Feb 87

Diagnostics / 3.1

(
o

INTRODUCTION

MacTest

This section describes general procedures for using the
MacTest diagnostic diskette to test the Macintosh and
Macintosh Plus logic board and disk drives. MacTest is
a pass/fail diagnostic test, which indicates the area
being tested and the kind of test being performed when
a failure occurs.

How to Use It

The MacTest diskette is used to identify module
failures of the main logic board, keyboard, keypad, and
disk drives on the 128K and 512K Macintosh as well as
the 1024K Macintosh Plus.

Before running Mac Test, read the section entitled
"Things To Remember."
If you cannot boot the diskette, check the power cable
and internal cable connections. If all the cables are
secure, turn to Section 3, Troubleshooting, and replace
the moduleCs) specified for the problem you are
experiencing. Attempt to boot the diskette after each
module swap to check whether the problem has been
solved.
Replace modules when indicated by test results. Verify
that the problem has been corrected by retesting with
the diagnostic diskette. If correct operation is still not
obtained, turn to the Troubleshooting section and
follow its instructions.
If you receive an error code while attempting to run
Mac Test, check the list at the end of this section for
what you can do to correct the problem.

3.2/ Diagnostics

rev. Feb 87

Macintosh / Macintosh Plus

(

)
o

THINGS TO REMEMBER

Backup Information

1. Make a backup diskette before you begin! When
testing a defective Macintosh or Macintosh Plus, it
is possible to erase and/or damage a section of the
Mac Test diskette.
There are two copy routines included on the
MacTest diskette. Be sure to follow the
instructions included in this section under "Backup
Proced ure. "

Loopback Information

2. Identify the machine as a Macintosh or a Macintosh
Plus. Connect the correct loopbacks for the machine
you are testing (see "Materials Required" for more
information).
3. Whenever a dialog box appears indicating that an
item is not connected or installed (keyboard or
loopbacks, for example), click in the OK box. The
test sequence will be aborted and an error code
will be displayed. Connect the item and/or deselect
the test from the Select Test menu, reboot, and run
the diagnostic again.

)

4. If the loopback cable and/or the SCSI loopback test
card are not connected, be sure to deselect Serial
Loopback and/or SCSI Loopback [Mac +] under the
Select Test menu, and save the new configuration.
If you do not deselect the tests, a dialog box will
appear asking if the loopback cables are installed.
Click in the OK box. The test sequence will
automatically abort.
5. If the loopback cable and/or the SCSI loop back test
card are installed, be sure to select Serial Loopback
and/or SCSI Loopback [Mac +] under the Select Test
menu, and save the new configuration. If you do not
select the tests, the ports will not be tested.

6. If you are using the SCSI loopback test card it must
be correctly installed or the Macintosh PI us will be
"recognized" as a 512K Macintosh.
Powering Off

7. To eject the MacTest diskette, pull down the
Options menu and select Shutdown.

)
Macintosh / Macintosh Plus

rev. Feb 87

Diagnostics / 3.3

Saving Configurations

8. Under Options is an item called Save Configuration.
This option allows you to save a favorite
configuration on the diskette. The name of the file
must be Options.OPTN to run.

DeskTop Appears

9. If the MacTest window does not appear but a screen
with desktop and file icons does appear, you will
need to:

Open the MacTest diskette icon, and highlight
the MacTest file icon.

Pull down the Special menu and select Set
Startup.

(

The internal disk drive will whir for a few
seconds and stop.
c)
Stopping Continuous Test

Reboot the Mac Test diskette.

10. To stop the continuous test, do the following (the

mouse will respond slowly):
a)

Pull down the Options menu and select Auto
Run Not Selected.

Pull down the Options menu and select Save
Configuration.

(

The new configuration will be saved. The
continuous test will stop after the next reboot
cycle.
Desk Accessories

11. All Desk Accessories must be closed before running
Mac Test.

External Drives

12. MacTest cannot test an external drive that is
connected through a Hard Disk 20.

l
3.4 / Diagnostics

rev. Feb 87

Macintosh / Macintosh Plus

)
o

BACKUP PROCEDURE
Two copy programs are included on the MacTest
diskette for your convenience. Both routines require
two disk drives.

400K Drive Copy

The destination diskette for the 400K Drive Copy must
be a double-sided diskette, but it must be inserted into
a 400K external disk drive.

BOOK Drive Copy

The BOOK Drive Copy program must be run on the
Macintosh Plus with l024K of memory. The program
will allow you to format and copy to either double- or
single-sided diskettes.

Procedure

1. Write protect the MacTest diskette.

2. Insert the MacTest diskette, and power on the
system.
The Service MacTest window will appear.

)

3. Pull down the Options menu and select Quit to
Finder.
The drive will whir, and the desktop will appear
with the MacTest diskette displayed in the upper
right-hand corner.
4. Open the MacTest diskette icon.
The following file icons should be displayed.

MatTest Disk:

6 itl?ms

321 K in disk

Systl?m Foldl?r

Options .OPTN

78K availabll?

800K Drivl? Copy

400K Drivl? Copy

KJI
5. Open either the 400K Drive Copy or the SOOK
Drive Copy icon. Follow the apropriate instructions
on the next few pages.

)
Macintosh / Macintosh Plus

rev. Feb 87

Diagnostics /3.5

400K Drive Copy

1. The following window will appear.

(

Format-(:opy Utilities
Internal

~acTest

(

Disk

get file

External
No Diskette Inserted

get file

( copy disk>

< copy disk

( format disk

format disk

(

zero disk

( uerify disk

uerify disk

( wr boot blk

wr boot blk

( eject disk

eject disk

[ Notes

The message under Internal Disk should be
"MacTest."
Dialog Box Appears

2. Insert a blank or a diskette you wish to copy over
(double-sided) into the external drive. If a dialog
box appears asking "Do you want to initialize it?":
a) Click in the box labeled Initialize.
b) A dialog box will appear asking you to name the
diskette. Enter a name and then click in the box
labeled OK.
c) The copy window will again be displayed. The
name of the diskette in the external drive will
appear in the block labeled External Drive.
d) Continue to step 3.

... Continued on next page

3.6/ Diagnostics

rev. Feb 87

Macintosh / Macintosh Plus

(

)

No Dialog Box Appears

If the dialog box does not appear:
a) The name of the diskette will appear in the
block labeled External Drive.
b) Under the box labeled External is a column of
boxes with various commands. Click in the box
labeled Format. The external drive will whir
and the message "Disk Format In Progress" will
appear in the box labeled Notes. On completion
the message "Disk Format Was Successful" will
appear in the box labeled Notes.
c) Continue to step 3.
3. Under the box labeled Internal is a column of boxes
with various commands. Click on the box labeled
.
The message "Disk Copy In Progress" will appear in
the box labeled Notes. The drives will whir for a
few minutes. The external drive will eject the
diskette on completion of the copy. The message
"Disk Successfully Copied" will appear under the
box labeled Notes.

)

4. You now have two choices:
If you wish to make additional copies:
a) Insert a blank or a diskette you wish to copy
over into the external drive.
b) Repeat steps 2 and 3.
c) Repeat steps 4a and b until you have the number
of copies you desire.
If you wish to quit making copies, pull down the
Utility menu and select Quit. The desktop will
appear.
You now have one or more copies of the MacTest
diskette. Place the original in a safe place.

)
Macintosh / Macintosh Plus

rev. Feb 87

Diagnostics / 3.7

BOOK Drive Copy

(

1. The following window will appear.

IJisk [)uplicHtion

Moster D;sk
MacTest Disk -->One sided format

r---

(

[)OWnlOHd

)

(

Eject IJisk

)

Loader

Notes
Memory avai lable:87018
Double-Sided buffers al located.

r---

Done:

Passed:

Rejected: 0

Wait till the Watch icon disappears.
2. Click in the box labeled DownLoad.
The message "Disk Download in progress .... " will
appear in the box labeled Notes. The drive will
whir for approximately one minute, and then it will
eject the Mac Test diskette. The message "Disk
Successfully Downloaded" will appear in the box
labeled Notes.
3. Insert a blank or a diskette you wish to copy over
(double-sided) into the external disk drive.
4. Click in the box labeled Start.
The message "Format/Copy in progress" will appear
in the box labeled Notes. The drive will whir, and
the message will change to "Verify in progress."
The message will change to "Disk Copy is
successful" and the copy will be ejected from the
external disk drive.

3.8/ Diagnostics

rev. Feb 87

Macintosh / Macintosh Plus

(

)

5. You now have two choices.
a) If you wish to make additional copies:
1) Insert a blank or a diskette you wish to copy
over into the external drive.
The program will make another copy without
any commands being entered.
2) Repeat this until you have the number of

copies you desire.
b) If you wish to quit making copies.
1) Click in the box labeled Stop.
2) Pull down the Options menu and select Quit.
3) Insert the Mac Test diskette, as instructed in
the dialog box.
The desktop will return.
You now have a copy of the MacTest diskette. Place
the original in a safe place.

)

Macintosh / Macintosh Plus

rev. Feb 87

Diagnostics /3.9

(
o

RUNNING MACTEST

Materials Required

Identify which Macintosh you have by examining the
connectors on the rear of the machine (see Section 1,
Basics). Locate the following equipment for the
Macintosh or for the Macintosh PI us.
The loopback equipment does not need to be
installed to run the diagnostic. However, to test the
machine completely the loopbacks should be used.
Refer to "Things to Remember" at the beginning of this
section.
Note:

Macintosh

MacTest diagnostic diskette
DB 9 Serial Port Plug (Set of 2)
Blank 400K formatted diskette for External Drive Test
The DB 9 loopback connectors should be installed on
the two serial ports on the rear of the machine.

Macintosh Plus

Mac Test diagnostic diskette
DIN-8 to DIN-8 Serial Port Cable Ooopback connector)
SCSI Loopback Test Card
Blank formatted 400K diskette for External Drive Test
The loopback cable with DIN-8 connectors should be
installed between the two serial ports on the rear of
the machine.
TO SCSI PORT ON REAR_--t~
OF MACINTOSH PLUS

TO MOUSE PORT ON REAR
OF THE MACINTOSH PLUS

CONNECT THE MOUSE HERE

FIGURE 1

3.10 / Diagnostics

rev. Feb 87

Macintosh / Macintosh Plus

(

The SCSI Loopback Test Card should be connected to
the Macintosh Plus (Figure 1). The cable connected to
the SCSI port will need to be folded over in order to
reach the port on the Macintosh plus.

)

CAUTION: Always power off the system when you
connect or disconnect the SCSlloopback card.

The new-style mouse with the small connector must be
used. Gently jiggle the mouse connector onto the board
at the location indicated below.

Pull-Down
Menus and
Icons

The following window should appear (on a S12K
Macintosh) .

Seruice MocTest

)
STRRT

The following pages will explain how to use and what
to expect from each of the features listed under the
four pull-down menus.

)
Macintosh / Macintosh Plus

rev. Sep 89

Diagnostics / 3.11

512K

(
This pull-down menu indicates the amount of memory in
the Macintosh or Macintosh Plus you are working on.
For a 128K machine, 128K would be displayed. For the
Macintosh Plus, 1024K Mac+ would be displayed.
~ele(

t Test

Select Test
Uideo Alignment Screen
./Moin Logic I, eHcept RAM Tests
./Moin Logic II, RAM Tests
./Short RAM Tests, [3 Min per SI2K]
Long RAM Tests, [6 min per SI2K]
./Seriol LoopBock
./SC~ J f. oopH
c:::>

c::>
:
c:.

=--...:~~~-~-t1ll

ODOo

MICRO~~~gEsSOR

,...--_ _ _ _ _ _ _ _- - ,

ROM HI
Old 342-0220-A or
342-0220-8
New 342-0341

ROM LOW
Old 342-0221-A or
342-0221-8
New 342-0342

0000 I 00000000 DOD
0000 I 00000000 ::: ~ Ii
o

It
UF

• \..V

C»

.c:::J.

RAM

MACINTOSH 128K1512K LOGIC BOARD

)

AGURE1
6.

Remove the internal disk drive (refer to Section 1,
Take-Apart).

Reinstall the Macintosh logic board and install the
new BOOK internal disk drive.

Replace the RFI shroud and rear housing.

Run Mac Test to verify that the machine is still
working correctly.

10.

Return the old ROMs and 400K disk drive to Apple
(refer to instructions included in the kit).

)
Macintosh / Macintosh Plus

rev. May 90

Additional Procedures / 6.5

(
For 128K1512K
ROM HI
342-0220
ROM LOW
342-0221

.,..
.,..

·0000
E

00i -

~M" "'I:. .i . ,;Ci. I . c:::>
c

-~ [JO~ ~I'~~
-=-=-

·0000
o

cacao"

,aO(]D~~

ROM LOW
New 342-0342

MACINTOSH PLUS 1 MEGABYTE LOGIC BOARD

FIGURE 3

6.6 / Additional Procedures

rev. Nov 88

Macintosh / Macintosh Plus

)

Macintosh Plus
Logic Board Kit

Read "Things to Remember" before beginning.
The Macintosh Plus Logic Board Kit cannot be installed
unless the Macintosh Plus ~isk Drive Kit has been
installed. You will need the new ROMs which were
installed for the disk drive kit. The logic board kit
includes a Macintosh Plus logic board with 1 megabyte
of memory, an RFI shroud, and a new rear housing.

Return Information

The shipping instructions must be followed exactly as
stated on the sheet included with the Macintosh Plus
Logic Board Kit.

Procedures

Power off the Macintosh and remove the power
cable from the machine.

Remove the old rear housing and RFI shroud.

Discharge the CRT as specified in Section 1, TakeApart.

WARNING: Make sure the anode has been discharged
before continuing. Failure to discharge the anode
could result in serious injury. Also, if you discharge
the Macintosh CRT to the metal chassis, the logic board
may be destroyed. You must discharge to the

)

ground lug/
4.

Remove the 12SK/512K Macintosh logic board.
Using an IC extractor, remove the two Revision D
ROMs. ROM HI is at location 05, and ROM LOW is
at location os. (Refer to Figure 2, Macintosh
12SK/512K Logic Board.)

Install the two ROMs in the appropriate locations
on the new logic board: ROM HI (PIN 342-0341) at
location 05, ROM LOW (PIN 342-0342) at location
OS. (Refer to Figure 3, Macintosh Plus 1 Megabyte
Logic Board.) There is a notch at one end of each
ROM. This notch should face the front of the
machine on installation.

6. Install the new Macintosh logic board with the
ROMs. Install the new RFI shroud and the new rear
housing.

)
Macintosh / Macintosh Plus

Run MacTest to verify that the machine is still
working correctly.

Return the old logic board (with no ROMs), the old
RFI shroud, and the old rear housing to Apple.
rev. May 90

Additional Procedures / 6.7

o SPECIAL PROBLEMS
Alternate
Chassis
Screw Sizes

(

Some Macintosh systems have been shipped with nonstandard chassis screws. The standard Macintosh uses
three 2.9 x 10 mm screws to attach the power/sweep
board to the chassis, and one 2.9 x 6 mm screw to attach
the ground lug to the chassis. The non-standard systems
use one of the following types of screw for both the
board and the ground lug:

•

#6 x 3/8" Type

A sheet metal screw, Phillips pan
head, with external tooth start washer attached,
steel, with zinc or cad plating

•

#4-40 x 3/8" machine screw

To determine which screw is needed, compare the
screw holes with the figures below. Systems with pem
nuts or nutserts (Figures 4 and 5) use the machine
screw. Systems without them (Figure 6) use the sheet
metal screw.
These screws are available at any hardware store.

(
CHASSIS

--1

WASHER,~

I
PEM NUT

FIGURE 4

WASHER
CHASSIS

---1

I
NUTSERTS

FIGURE 5

CHASSIS

T
__

---1L..._ _W_A_S_H_ER_,
__

----I

FIGURE 6

6.8 / Additional Procedures

rev. May 90

Macintosh / Macintosh Plus

)

BOOK Drive
Exchange
Compatibility

There are three series of BOOK drive mechanisms.
All three mechanisms can be used as an internal drive,
but only with the cable specified below. If you do not
use the correct cable, the drive will not work
correctly.

Series Number

Cable Needed

MFD-51 W-03 (Red on Silver Label)
MFD-51 W (Black on Silver Label)
51W-I0 (Black on Silver Label)

Yellow
Red
Red

For additional information refer to the Disk Drives tab.

BOOK Disk
Ejection
Problems

Whenever a disk from an internal or external BOOK
drive does not fully eject, the user must push the disk
back in and attempt to eject it electronically.
WARNING: If the disk becomes "frozen" and does not
fully eject, the user must not force the disk by pulling it out
from the drive. Using force may result in damage to the
mechanism.

The following three ways of ejecting the disk should
be tried:

)

Hold down the and keys and
press 1 (for the internal drive) or 2. (for the
external drive).

Pull down the File menu and select Eject. Attempt
this two or three times.

As a last resort, insert a paper clip in the pin hole
located beneath and to the right of the slot where
the disk is inserted.

)
Macintosh / Macintosh Plus

rev. May 90

Additional Procedures / 6.9

The following factors can also affect the insertion and
ejection of a disk:
•

A disk should be inserted by pressing the disk
gently into the drive. Avoid grasping and pushing
the disk, as this may cause the disk to go in only
part way and stop. If this happens, the user should
attempt to eject the disk as described above.

•

Disks with three or more labels may not slide
easily into and out of the disk slot in the Macintosh
case.

(

Technicians should also be careful when removing or
installing a disk drive mechanism. If the disk opening
in the disk drive mechanism is not properly centered,
binding or friction may cause ejection problems. If the
internal mounting bracket is warped or bent, the drive
will not align properly with the bezel and the mounting
bracket will need to be exchanged. Refer to Section 2,
Take-Apart, for the proper installation procedure.

(

Left
Side

FRONT VIEW

FIGURE 7

FIGURE 8

6.10 / Additional Procedures

rev. May 90

Macintosh / Macintosh Plus

)

Removing
Disks That
Will Not Eject

If a disk becomes "jammed" in a customer's disk
drive, use the following procedure to remove it
before you return the disk drive.
1.

Remove the disk drive (refer to Section 2, TakeApart).

Place the disk drive and RFI shield assembly upside
down on a flat surface.

3. Remove the four screws securing the disk drive
mechanism to the RFI shield.
4.

Remove the disk drive mechanism from the RFI
shield.

Place the disk drive mechanism on a flat surface,
with the printed circuit board facing down and the
disk opening facing you (Figure 7).
If the disk is not already fully inserted into the
disk drive, push it in until it is properly seated.

6. Press the eject lever at the right side of the disk
drive (Figure 7, #1).

)

Turn the disk drive so that the left side is facing
you.
7.

Locate the small arm with a cylindrical cog at its
end. This arm is located near the left-to-right
center of the drive mechanism (Figure 8, #1). The
cog will be caught in the half-moon depression of
the disk case.

Insert a small screwdriver at the position shown in
Figure 8, #2, and gently move the arm away from
the disk until the disk pops forward slightly.
Remove the disk from the disk drive.

Return the defective disk drive to Apple and follow
the instructions in Section 2, Take-Apart, to align
the new disk drive with the front bezel .

)

Macintosh / Macintosh Plus

rev. May 90

Additional Procedures / 6.11

(

ROM HI
342-0220-8
~

-=-

.....

DOOOO=~
E

~.~
.

001~ . . .MI~CR'-U...iO~
. 6p~~~OC~O

E!.. .U. .SSII.. U. ORt.. U. .U. .lI.·

OD00

r-------_
F

0000 I 00000000 000
0000 I 00000000 :: ~ •
o

ROM LOW
342-0221-8

(

c:::J

RAM

FIGURE 9

6.12 / Additional Procedures

rev. May 90

Macintosh / Macintosh Plus

)

Logic Board
ROM Upgrade and
400K Drives

Current 400K disk drives contain a new stepper motor,
which may require the replacement of the two boot
ROMs on older Macintosh logic boards (both 12BK and
512K). Both of these ROMs are socketed. The new
ROMs are compatible with both the new and old
stepper motors.
The 12BK/512K Macintosh should have ROM HI 3420220-B at location D5, and ROM LOW 342-0221-B at
location DB. If these ROMs are not installed, you need
to upgrade the logic board by replacing the boot ROMs.

Installation
Procedures

Power off the Macintosh and remove the power
cable from the machine.

Remove the cover and discharge the CRT (refer to
Section 2, Take-Apart).

)

Remove the Macintosh logic board. Referring to
Figure 9, locate the two ROMs and verify that the
old ROMs are installed.

Using an IC extractor, remove the ROMs and place
them on a piece of antistatic foam.

Install the new ROMs in the appropriate location
[ROM HI (PIN 342-0220-B) at location D5, ROM
LOW (PIN 342-0221-B) at location DB]. There is a
notch at one end of each ROM. This notch should
face the front of the machine on installation.

6. Reinstall the Macintosh logic board.
7.

Replace the back cover.

Run Mac Test to verify that the machine is still
working correctl y.

)
Macintosh / Macintosh Plus

rev. May 90

Additional Procedures / 6.13

o MACINTOSH PLUS RAM UPGRADES
Introduction

(

The Macintosh Plus may be configured in three ways:
1 MB (which is standard) and 2.5 MB or 4 MB (which
are both upgrades or expansions). The expansions must
follow strict guidelines that involve modifying the
Macintosh logic board and installing the SIMMs.

Note: For installation purposes, the SIMMs are labeled
Bank A (Figure 10, #3) and Bank B (Figure 10, #4).
Each bank or row is composed of two slots, and both
slots must have a SIMM installed.
Note: When removing SIMMs from the logic board, use
the SIMM removal tool. See You Oughta Know.

Logic Board
Configurations

There are two resistors, located on the upper-left side
of the logic board, that give the Macintosh important
information about the size of the installed SIMMs.
•

If you have more than one bank of SIMMs installed,
the ONE ROW, R9 (Figure 10, #1) resistor should
be cut out using insulated wire cutters.

•

If you have 256K SIMMs in both Bank A (Figure 10,
#3) and Bank B (Figure 10, #4), the resistor marked
256K BIT, R8 (Figure 10, #2) must be installed.

•

If either bank has 1 MB SIMMs, resistor R8 (256K
bit) must be removed.

FIGURE 10

6.14 / Additional Procedures

rev. May 90

Macintosh / Macintosh Plus

(

The following chart summarizes the various SIMM
configurations that the Macintosh Plus and the system
software support.

)

RAM

Bank A (Figure 11 #1)

Bank B (Figure 11 #2)

Two 256K SIMMs

2.5 MB Two 1 MB SIMMs

Two 256K SIMMs

4 MB

Two 1 MB SIMMs

1 MB

Two 1 MB SIMMs

IMPORTANT: Other configurations, such as a single
SIMM or a pair of differently sized SIMMs, will not function
correctly.

Note: For further information on the SIMMs currently
available for the Macintosh Plus, see the standalone
chart titled ". Quick Reference: SIMM Compatibility. II

The following chart summarizes the amount of RAM
installed in various resistor configurations.

)

RAM

256K BIT (RS)

ONE ROW (R9)

1 MB

Present

Removed

2.5 MB

Removed

4 MB

Removed

FIGURE 11

Macintosh / Macintosh Plus

rev. May 90

Additional Procedures / 6.15

o ROM VERSION COMPATIBILITY
ROM Upgrades
for Enhanced
Macintosh Systems

(

Since March, 19S7, the Macintosh 512K enhanced
system, the Macintosh Plus, and the SO OK disk drive
upgrade kit have been shipped with a new set of highboot and low-boot ROMs. These ROMs correct SCSI
device problems that were being experienced with
older ROMs. The new ROMs are fully compatible with
512K systems, but you must not mix old and new ROMs.
The following list gives the part number and the
version letter of the old and new ROMs.

Replacing 512K
Logic Boards

6.16 / Additional Procedures

Old ROMs

New ROMs

High Boot:

342-0341-A
342-0341-B

342-0341-C

Low Boot:

342-0342-A

342-0342-B

The 512K logic board (PIN 661-96236) is shipped with
a high-boot ROM (PIN 342-0220) and a low-boot ROM
(PIN 342-0221) that support only the 400K disk drive.
When the 512K logic board is used to replace a
defective 512K enhanced system logic board, or a
defective 512K system logic board with a SOOK disk
drive, you must replace its ROMs with ROMs from the
customer's logic board. The customer's ROMs, which
support SOOK disk drive systems, have part numbers
342-0341 (high-boot ROM) and 342-0342 Clow-boot
ROM).

rev. May 90

Macintosh / Macintosh Plus

(

• Apple Technical Procedures

)

Macintosh and Macintosh Plus
Section 7 - Illustrated Parts List
o CONTENTS
7.3
7.5
7.7
7.9
7.11
7.13
7.15
7.17
7.19

Macintosh External Housing (Figure 1)
Macintosh Plus Chassis & Power Supply
(Figure 2)
Macintosh Exploded View (Figure 3)
Macintosh Keyboard Assembly (Figure 4)
Macintosh Numeric Keypad Assembly (Figure 5)
Macintosh Plus Rear Housing (Figure 6)
Macintosh PIus-Exploded View (Figure 7)
Macintosh Plus Keyboard Assembly (Figure 8)
Service Packaging, 800K/1.4 MB Drives
(Figure 9)

The figures and lists in this section include all piece
parts that can be purchased separately from Apple for
the Macintosh, along with their part numbers. These
are the only parts available from Apple. Refer to your
Apple Seroice Programs manual for prices.

)

Note: Only items unique to the Macintosh Plus are
called out on Figures 6, 7, and 8.

Macintosh / Macintosh Plus

rev. Oct 88

Illustrated Parts List /7.1

(

7.2/ Illustrated Parts List

1/
II

rev. Apr 87

Maclntos
.
h / Macintosh Plus

)

o MACINTOSH EXTERNAL HOUSING (Figure 1)
~

1
2
3
4
5
6
7
8
9
10
11
12
13

)

14
15

Part No.

Description

630-5139
742-0003
426-1007
815-0737
815-0763
815-0938
815-0971
825-4018
825-1014
825-0742
825-1065
825-0613
435-5002
590-0138
590-0131
865-0051
825-0547
661-96155
661-0400
699-8001
815-0409

Rear Housing with Label
Battery, Alkaline, 4.5 V
Screw, Tap, M 4.22 x 1.41 x 16, Torx, Zinc
Reset/Interrupt Switch, Beige
Reset/Interrupt Switch, Smoke
Macintosh Battery Door, Beige
Macintosh Plus Battery Door, Platinum
Agency Approval Label
Agency Approval Label, 512K Enhanced
Macintosh Label
Macintosh Signature 512K Label
Logo Label (Housing)
Screw, Tap, 8-32 x .625 Fill, Torx, Black Zinc Oxide
Power Cable, Beige
Power Cable, Smoke
Macintosh Foot
Logo Label (Bezel)
Macintosh Mouse
Apple Mouse, Platinum
Rubber-Coated Mouseball
Mouseball Retainer

)
Macintosh / Macintosh Plus

rev. Nov 89

Illustrated Parts List /7.3

(

N
W

c::

::J

~
.......

(

lL.

l
7.4 / Illustrated Parts List

rev. Apr 87

Macintosh / Macintosh Plus

)

o MACINTOSH I MACINTOSH PLUS-CHASSIS AND POWER
SUPPLY (Figure 2)

!mm.
1

2
3
4
5
6

Part No.

Description

661-0461
661-0462
661-76214
470-2101
805-0576
805-0766
490-0002
865-0029

Power Supply, Beige
Power Supply, Platinum
Power Sweep Board, 220 V
Screw, 2.9 x 10 mm
Lower Ground Clip
Macintosh Chassis
Screw, Tap, 6-32 x .375 (Chassis Grounding)
Brightness Knob, Smoke

)
Macintosh / Macintosh Plus

rev. Nov 89

Illustrated Parts List /7.5

(

FIGURE 3

l
7.61 Illustrated Parts List

rev. Dec 91

Macintosh I Macintosh Plus

)

o MACINTOSH .Hem
1
2
3
4
5
6

)

7
8
9
10
11
12
13
14
15
16

EXPLODED VIEW (Figure 3)

Part No.

Description

805-0765
805-0217
661-76156
661-0345
590-0167
590-0437
725-0011
590-0184
740-0300
740-0060
426-1001
661-96236
805-0577
661-0221
661-0220
462-3100
590-0160
725-0018
810-0373
076-0103

Shield for Internal Drive
Shield for Internal 800K Drive (512K enhanced)
400K Mechanism, Apple 3.5 Drive
800K Mechanism, Apple 3.5 Drive (512K enhanced)
Cable, Internal 3.5-Inch Drive (red striped)
Cable, Internal 3.5-Inch Drive (yellow striped)
Insulator Shield (back of power supply)
Cable, Power Supply to Logic Board
Fuse, U.S. Power Supply, 2.5 A 250 V
Fuse, Int'l Power Supply, 1.6 A 250 V
Screw, Tap, M 4.22 x 1.41 x 13 (CRT and chassis)
Logic Board·
RFI Shroud
ROM, Low, Macintosh with 400K Floppy··
ROM, High, Macintosh with 400K Floppy··
Screw, M 3 x .5 x 6
CRT Socket Cable
Mylar Washer
Front Bezel
CRT and Yoke Assembly

• If the logic board fails, refer to Section 6, Additional
Procedures, for instructions.

*·Use these ROMs on 128K and 512K logic boards that
have not been upgraded with ROMs that support an
800K disk drive.

)
Macintosh / Macintosh Plus

rev. Dec 91

Illustrated Parts List /7.7

(

7.8/ Illustrated Parts List

rev. Feb 87

Macintosh / Macintosh Plus

)

o MACINTOSH-KEYBOARD ASSEMBLY (Figure 4)
~

Part No.

Description

1
2
3
4
5
6

661-0322
658-7039
815-0728
815-0754
430-1025
705-0070

590-0144
590-0170
705-0077

Keyboard, Beige (replacing part number 661-96154)
Keycap Set
Keyboard Top Case
Keyboard Bottom Case
Screw, Tap 2.20 x 6.25 (Keyboard Case)
Alps Long-Stem Keyswitch, Macintosh/
Macintosh Plus+
Keyboard/Keypad Cable, Beige
Keyboard/Keypad Cable, Smoke
Alps Alpha Lock Keyswitch, Macintosh/
Macintosh Plus·

Note: Keycaps are not available for international
keyboards. For Macintosh Plus keycap set, see
Figure 8, "Macintosh Plus Keyboard Assembly."
+Refer to keyswitch identification in Appendix section.

)

)
Macintosh / Macintosh Plus

rev. Nov 89

Illustrated Parts List / 7.9

(

l
7.1 0 / Illustrated Parts List

rev. Feb 87

Macintosh / Macintosh Plus

o MACINTOSH -

NUMERIC KEYPAD ASSEMBLY (Figure 5)

!mm

Part No.

Description

1
2
3

658-4045
865-0051
430-1025

Keypad Assembly
Macintosh Foot
Screw, Tap, 2.2 x 6.25

Note: The keyswitch used on the Macintosh Numeric

Keypad is the same as that on the Macintosh Keyboard:
Alps Longstem Keyswitch (pin 705-0070). See
Appendix A for illustration.

)

)
Macintosh / Macintosh Plus

rev. Apr 87

Illustrated Parts List / 7.11

(

I,
" /

(

'"
'"

w
a:

:J
~

l.J...

l
7.12/ Illustrated Parts List

rev. Feb 87

Macintosh / Macintosh Plus

)

o MACINTOSH PLUS -

REAR HOUSING (Figure 6)

Item

Part No.

Description

630-5211
630-5235
815-0938
815-0971
825-1254
825-1345

Rear Housing, Beige
Rear Housing, Platinum
Battery Door, Beige
Battery Door, Platinum
Agency Approval Label, Beige
Agency Approval Label, Platinum

2
3

)

J
Macintosh / Macintosh Plus

rev. Aug 87

Illustrated Parts List / 7.13

(

I.
I

FIGURE 7
7.14/ Illustrated Parts List

rev. Oct 90

Macintosh / Macintosh Plus

)

0 MACINTOSH PLUS - EXPLODED VIEW (Figure 7)

1
2

3
4
5

6
7
8
9

10
11

)

12
13
14
15

Part No.

Description

805-0217
661-0345
590-0167
590-0437
661-0525

Shield for Internal Drive
Drive Mechanism, 800K
Cable, Internal 3.5-Inch Drive (red stripe)
Cable, Internal 3.5-Inch Drive (yellow stripe)
Logic Board (without RAM; replaces part number
661-0321)
SIMM, 256K, 120 ns
SIMM, SOJ, 1 MB, 120 ns
SIMM, DIP, 256K, 120 ns
SIMM, SOJ, 256K, 80 ns
SIMM, SOJ, 1 MB, 80 ns
Resistor, 150 Ohms, 1/4 W, ±S%
RFI Shroud
ROM, Low
ROM, High
Packing Disk, 2-sided (for transporting)
Screw, M 3 x 6 (with two washers)
Shipping Fixture, 1.4 MB Drive Mechanism
Ground Clip
Logo Plate Label
Front Bezel

661-0402
661-0403
661-0494
661-0519
661-0520
101-4151
805-5047
661-0633
661-0632
003-0003
462-3401
805-5050
805-0910
825-1256
810-0379

IMPORTANT: Refer to the. Quick Reference: SIMM
Compatibility chart for SIMM compatibility. Follow this
chart carefully! Some SIMMs may falsely appear to be
interchangeable.

)
Macintosh / Macintosh Plus

rev. Mar 92

Illustrated Parts List / 7.15

(

... ..

a:::

:::::>

"".......
LL

7.16/ Illustrated Parts List

rev. Feb 87

Macintosh / Macintosh Plus

(

o MACINTOSH PLUS - KEYBOARD ASSEMBLY (Figure 8)
Item
1

2
3
4
5

Part No.

Description

661-0322
661-0416
c661-0416
D661-0416
E661-0416
F661-0416
T661-0416
815-0936
815-0983
815-0937
815-0984
658-5186
658-5190
705-0104
705-0070

Macintosh Plus Keyboard, Beige (with cable)
Macintosh Plus Keyboard, Platinum (with cable)
Macintosh Plus Keyboard, Platinum, French Canadian
Macintosh Plus Keyboard, Platinum, German
Macintosh Plus Keyboard, Platinum, Spanish
Macintosh Plus Keyboard, Platinum, French
Macintosh Plus Keyboard, Platinum, Italian
Top Cover, Macintosh Plus K/B, Beige
Top Cover, Macintosh Plus K/B, Platinum
Bottom Cover, Macintosh Plus K/B, Beige
Bottom Cover, Macintosh Plus K/B, Platinum
Macintosh Plus Keycap Set, Beige
Macintosh Plus Keycap Set, Smoke
Mitsumi Keyswitch·
Alps Long-Stem Keyswitch, Macintosh/
Macintosh Plus·
Mitsumi Locking Keyswitch·
Alps Alpha Lock Keyswitch, Macintosh/
Macintosh Plus·

705-0044
705-0077

)
*Refer to keyswitch identification in Basics section.

J
Macintosh / Macintosh Plus

rev. Feb 89

Illustrated Parts List / 7.17

(

FIGURE 9

7.18/ Illustrated Parts List

Oct 88

Macintosh / Macintosh Plus

0 SERVICE PACKAGING, 800Kl1.4 MB DRIVES (Figure 9)

Hem

Part No.

Description

602-0210

Service Packaging, 800K/1.4 MB Drives

)

Macintosh / Macintosh Plus

Oct 88

Illustrated Parts List /7.19

(

)

(

• Apple Technical Procedures

)

Macintosh SE and Macintosh SEl30
Technical Procedures

o TABLE OF CONTENTS
Section 1Basics

1.2
1.2
1.3
1.6
1.7
1.10
1.11
1.11
1.11
1.14
1.14
1.14
1.15
1.15
1.15
1.16

Product Description
Macintosh SE Features
Macintosh SE/30 Features
FDHD Disk Drive
Connector Identification
Internal Expansion Connectors
Theory of Operation
Introduction
Main Logic Board
Power Supply
Analog Board
CRT and Video Board
Disk Drive(s)
SCSI Hard Disk
Apple Desktop Bus Keyboard and Mouse
Care and Handling

Section 2Take-Apart

2.2
2.5
2.5
2.7
2.8
2.14
2.16
2.22
2.25
2.28
2.31
2.31
2.33
2.33
2.35
2.37
2.40
2.42
2.46

Cover
Discharging the Cathode-Ray Tube (CRT)
Discharge Procedure
Anode Cap
Analog Board and Power Supply
Main Logic Board
Identifying Macintosh SE Logic Boards
SIMMs
Video Board
Cathode-Ray Tube (CRT)
Internal SCSI Hard Disk Drive
Identifying 20SC Revision A and B Drives
Removing the Drive From Its Carrier
Replacing the Drive In Its Carrier
LED Cable Assembly
Upper Internal Disk Drive
Lower Internal Disk Drive
Fan Assembly
Speaker, Front Bezel, and Slot Cover

)

)
Macintosh SE and SEl30

rev. Jun 91

Contents / i

Section 3Adjustments

3.2
3.2
3.2
3.3
3.3
3.4
3.4
3.4
3.5

Yoke Adjustments
Introduction
Materials Required
Tilt Adjustment
Centering Ring Adjustment
Video Adjustments
Introduction
Materials Required
Adjustment Procedures

Section 4Diagnostics

4.2
4.2
4.3
4.4
4.4
4.6
4.6
4.6
4.8
4.9
4.14
4.16
4.17
4.17
4.17
4.20
4.22
4.26
4.28
4.29
4.29
4.30

Introduction to MacTest SE and MacTest SE/30
Program Similarities
Program Differences
Making Backup Disks
Copying MacTest SE and MacTest SE/30 Disks
Running MacTest SE and MacTest SE/30
Materials Required
Starting MacTest SE and MacTest SE/30
Installing the Loopbacks
Using the MacTest SE and SE/30 Menus
Running the Tests
Introduction to AppleCAT SE and AppleCAT SE/30
Running AppleCAT SE and AppleCAT SE/30
Materials Requ ired
Setting Up Test Station and UUT
Establishing Communication
Using the AppleCAT Menus
Running the Tests
Repair Confirmation Codes
SCSI Loopback Jumper Procedure
To Determine If a Jumper Is Needed
To Install the Jumper

5.3
5.3
5.3
5.3
5.4
5.4
5.6
5.7
5.8
5.9
5.10
5.12
5.12
5.12
5.12

Introduction
General Information
How to Use the Symptom Chart
Things to Remember
Symptom Chart
Video Problems
Peripheral Problems
Drive Problems
SCSI Problems
Miscellaneous Problems
Isolating a Faulty Macintosh SE SIMM
Battery Verification
Introduction
Materials Required
Verification Procedure

Section 5Troubleshooting

ii I Contents

rev. Jun 91

Macintosh SE and SEl30

(

)

Section 6AddlUonai
Procedures

6.3
6.3
6.4

6.5
6.7

6.8
6.8
6.8
6.9
6.10
6.10
6.11
6.12
6.14
6.15
6.17
6.18
6.20
6.20
6.20
6.21
6.24
6.24
6.24
6.25
6.25
6.25
6.26
6.26
6.26
6.29
6.29
6.29
6.29

)

Battery Replacement
Introduction
Battery Identification
Replacing Soldered Batteries (SE only)
Replacing Batteries in Battery Holders
SIMM Identification
Speed
1 MB SIMMs
256K SIMMs
Macintosh SE SIMM Upgrades
RAM Configurations
SIMM Arrangements
Logic Board Identification
Solder-Type Logic Board
Solder-Type Upgrades
Jumper-Type Logic Board
Jumper-Type Upgrades
Macintosh SE/30 SIMM Upgrades
RAM Configurations
SIMM Arrangements
SIMM Upgrades
Macintosh SE Chassis Tab Modification
Introduction
Modification Procedure
Chassis Assembly
Introduction
Assembly Procedure
Macintosh SE/30 Logic Board Upgrade
Introduction
Installation
FDHD Upgrade for the Macintosh SE
Introduction
Materials Required
Upgrade Procedure

J
Macintosh SE and SEl30

rev. Jun 91

Contents / iii

Section 7SE-Bus PC Card

Illustrated

Parts Ust

This section has moved to Apple PC 5.25 Drive.

IPL.3
IPL.5
IPL.7
IPL.9
IPL.ll
IPL.13
IPL.15
IPL.17
IPL.17
IPL.19

(

Internal View (Figure 1)
Chassis Assembly (Figure 2)
External Rear Housing (Figure 3)
Front Bezel (Figure 4)
Logic Board - Macintosh SE (Figure 5)
Logic Board - Macintosh SE/30 (Figure 6)
Analog Board (Figure 7)
Shipping Fixture, SOOK/1.4 MB Drives (Figure 8)
Dual Internal SOOK Drives (Figure 9)
Internal HDA (Figure 10)

Note: The labels FDHD and FDHD/SuperDrive refer to
the same product.

(

©Apple Computer, Inc., 1987-1991. No portion of this document may be reproduced in any form
without the written permission of Apple Computer, Inc.
MacTest, FDHD, Apple Desktop Bus, and SuperDrive are trademarks of Apple Computer, Inc.
Macintosh, AppleCAT, AppleTalk, Apple, and the Apple logo are registered trademarks of Apple
Computer, Inc.
MS-DOS is a registered trademark of Microsoft Corporation.
NuBus™ is a trademark of Texas Instruments.

l
iv I Contents

rev. Jun 91

Macintosh SE and SE/30

• Apple Technical Procedures

Macintosh SE and Macintosh SEl30
Section 1 - Basics

o CONTENTS
1.2
1.2
. 1.3
1.6
1.7
1.10
1.11
1.11
1.11
1.14
1.14
1.14
1.15
1.15
1.15
1.16

)

J
Macintosh SE and SE/30

rev. MargO

Basics 11.1

o PRODUCT DESCRIPTION
Macintosh SE
Features

The Macintosh® SE is an enhanced Macintosh Plus that
su pports internal and external customized expansion
options. This Macintosh comes with 1 or 2 megabytes
of RAM installed, with upgrades to 2.5 and 4 megabytes
available. The system also contains an internal
connector for expansion of the CPU bus, and provides
the customer with a choice of two drive configurations:
•

Two internal floppy disk drives

•

One internal floppy disk drive and one internal,
20 MB or 40 MB SCSI hard disk drive

The high-density (1.4 MB) Apple Floppy Drive High
Density (FDHD) disk drive is now the standard internal
drive for all Macintosh SEs. Macintosh SEs sold before
August 1989 were furnished with 800K internal disk
drives.
The Macintosh SE supports the same peripherals as the
Macintosh Plus, and will accept any keyboard or mouse
that connects to the new Apple Desktop BUS™.

Macintosh SE
Internal
Features

(

The Macintosh SE includes these new or improved (as
compared to the Macintosh Plus) internal features:
•

1 MB or 2 MB of RAM on repositioned, slanted
Single In-line Memory Modules (SIMMs)

•

New 256K ROM with modifications that support the
Apple Desktop Bus and FDHD disk drive, and
improve support of the Small Computer System
Interface (SCSI) and AppleTalk

•

Choice of internal 20 MB or 40 MB SCSI hard disk
or second internal floppy disk drive

•

Higher capacity 80-watt, wide-in put-range power
supply

•

Fan for cooling

•

Improved hardware handshaking on the SCSI port

l
1.2 I Basics

rev. Aug 89

Macintosh SE and SE/30

)

Macintosh SE
External
Features

)

•

96-pin Euro-DIN bus connector for internal
expansion board or other I/O device (mounting
holes provided)

•

Swing-away logic board mounting to allow easy
removal when an internal expansion board is
installed

•

One or two 1.4 MB, 3.5-inch FDHD disk drives

•

SWIM disk controller chip, which replaces the IWM
chip for controlling disk drives

•

Long-life lithium battery for clock and RAM cache

The Macintosh SE includes these external features:
•

Two Apple Desktop Bus connectors that support the
detached keyboard and mouse

•

Snap-out door at the rear to support optional
external II0 device

Macintosh SE/30
Features

The Macintosh 5E/30, which is named for its 16-MHz
68030 microprocessor, is the next generation in the
compact Macintosh SE line. The system is designed to
provide increased performance (up to four times faster
than the Macintosh SE), greater memory expandability
(up to 8 megabytes), and larger hard disk capacity.

Macintosh SE/30
System
Configurations

The Macintosh SE/30 requires System 6.0.3 (or later)
software. The system comes with 1 or 4 megabytes of
RAM installed, and contains a 120-pin, vertically
mounted expansion connector. The system also includes
an internal FDHD disk drive. The customer can choose
from three standard configurations:
•

1 MB of RAM and the FDHD drive

•

1 MB of RAM, FDHD drive, and 40 MB SCSI hard
disk

•

4 MB of RAM, FDHD drive, and 80 MB SCSI hard
disk

)
Macintosh SE and SE/30

rev. Aug 89

Basics 11.3

Macintosh SE/30
System
Features

Macintosh SE/30
Logic Board

1.4 I Basics

The Macintosh SE/30 includes the following system
features:
•

68030 microprocessor running at 16 MHz

•

68882 floating-point (numerics) coprocessor

•

1 MB or 4 MB of RAM on vertically mounted Single
In-line Memory Modules (SIMMs)

•

Eight repositioned SIMM sockets that can
accommodate system expansion to 8 MB

•

Single 32-bit, 120-pin expansion slot ("030 Direct
Slot")

•

Four 256K ROMs on a SIMM, upgraded to support
the FD HD disk drive

•

SWIM disk controller chip, which replaces the IWM
chip for controlling disk drives

•

Single 1.4 MB, 3.5-inch FDHD disk drive

•

Choice of internal 40 MB or 80 MB SCSI hard disk
drive

•

Removable, seven-year lithium battery

At the heart of the Macintosh SE/30 is the Motorola
68030 microprocessor (Figure 1, #1). The 68030 is a
true 32-bit microprocessor that is fully compatible with
earlier 16- and 24-bit Macintosh microprocessors. This
high-performance microprocessor runs at 16 MHz and is
designed to handle paged memory management
(incorporates the PMMU chip available for the
Macintosh II logic board). A 68882 numerics coprocessor
(Figure 1, #2) enhances system performance by assisting
with the floating-point calculations common in
spreadsheet applications.

rev. Aug 89

Macintosh SE and SE/30

(

)

FIGURE 1
The Macintosh SE/30 logic board includes new ROM
chips soldered on a SIMM board (Figure 1, #3). These
ROM chips include code that supports the FDHD disk
drive and SWIM disk controller chip. The SWIM chip
(Figure 1, #4) enables the FDHD to read and write both
GCR (Group-Coded Recording) data formats and MFM
(Modified Frequency Modification) data formats.

)

RAM memory in the Macintosh SE/30 is packaged in
256K or 1 MB Single In-line Memory Modules (SIMMs).
The Macintosh SE/30 logic board has two banks of
sockets that will hold up to eight SIMMs. Bank A
(Figure 1, #5) and Bank B (Figure 1, #6) each contain
four slots. Each bank, if used, must be filled with
identical 256K or 1 MB SIMMs. The following chart
illustrates RAM configurations that the Macintosh SE/30
will support:
RAM
1
2
4
5
8

MB
MB
MB
MB
MB

Bank A
Four
Four
Four
Four
Four

256K
256K
1 MB
1 MB
1 MB

Bank B
SIMMs
SIMMs
SIMMs
SIMMs
SIMMs

Empty
Four 256K SIMMs
Empty
Four 256K SIMMs
Four 1 MB SIMMs

)
Macintosh SE and SE/30

rev. Aug 89

Basics / 1.5

FDHD
Disk Drive

The 3.5-inch, 1.4 MB FDHD disk drive is a high-density
data storage system for both the Macintosh SE and the
Macintosh SE/30. Special high-density, 3.5-inch media
are required to take full advantage of the increased
data storage capacity of the FDHD drive. Do not,
however, use the high-density media in a 400K or 800K
disk drive; such data will be unreliable. A simple ruleof-thumb is always to use media that are appropriate for
the drive of lowest capacity; if you have both 800K and
1.4 MB disk drives, to be safe use only 800K media.

(

When used with the Apple File Exchange utility, the
FDHD disk drive also enables Apple systems (GCR data
format) to exchange data with MS-DOS systems (MFM
data format). The FDHD disk drive can read/write and
format 400K, 800K, and 1.4 MB Macintosh disks; 720K
and 1.4 MB MS-DOS disks; and 800K ProD OS disks.
When reading data in other formats, the Macintosh
SE/30 first copies MS-DOS or ProD OS data files using
the FDHD drive and Apple File Exchange utility, and
then uses special file translators to convert the data
from one application format to another. Some
applications, such as Microsoft Word, perform their own
translations.

(

1.6 I Basics

rev. Aug 89

Macintosh SE and SE/30

Connector Identification

The external connectors on the Macintosh SE and
Macintosh SE/30 are the same, but the internal
connectors differ slightly between models. The following
section shows the location of all external and internal
connectors on the Macintosh SE and Macintosh SE/30.

Back Panel
Connectors

The back panel of the Macintosh SE and Macintosh SE/30
has seven installed ports, and a slot for the installation
of an additional expansion port. The number beside the
port name below corresponds to the numbered arrow in
Figure 2.

)

#
#
#
#
#

1
2
3
4
5

#6
#
#

7
8

Apple Desktop Bus (mini DIN-4)
Apple Desktop Bus (mini DIN-4)
External drive port (DB-19)
SCSI port (DB-25)
Printer port (mini DIN-8)
Modem port (mini DIN-8)
Sound port (RCA phono jack)
Slot for optional expansion port

)

FIGURE 2

)
Macintosh SE and SE/30

rev. Aug 89

Basics I 1.7

Macintosh SE
Main Logic Board
Connectors

There are six connectors on the Macintosh SE logic
board. In the list below, the number beside the
connector name corresponds to the numbered arrow in
Figure 3.
#

2
3
4

#
#
#
#

5
6

(

Power connector
Connector for lower internal drive
Connector for upper internal drive
Internal hard disk SCSI 50-pin ribbon cable
connector
Speaker connector
96-pin Euro-DIN expansion connector

(

FIGURE 3

1.8 I Basics

rev. Aug 89

Macintosh SE and SE/30

)

Macintosh SE/30
Main Logic Board
Connectors

There are five connectors on the Macintosh SE/30 logic
board. In the list below, the number beside the
connector name corresponds to the numbered arrow in
Figure 4.

1
2

4
5

Power connector
Connector for internal 1.4 MB, 3.5-inch FDHD
disk drive
Internal hard disk SCSI 50-pin ribbon cable
connector
Speaker connector
120-pin, 32-bit, "030 Direct Slot" expansion
connector

)
ol!{{:!:::::)!{:] {:::::::::::::::::::::::I I:::::::::::::::::::::;:l Ell
1)::)::::::)::i:::i:!J 1:::::::::::::::::::::::1

I:::::::::::::::::::::::~

I:::::::::::::::::::::::j

~:::::::::::: :1
o~:
:~

:::::::::::

f!1Jl:

=:::==:11
:::
==:::=:1l
[IT]

It,! , oM,. !M

FIGURE 4

)
Macintosh SE and SE/30

rev. Aug 89

Basics 11.9

Internal
Expansion
Connectors

The Macintosh SE contains a 96-pin, right-angle
connector for supporting Apple and third-party
expansion cards. This connector has been replaced in
the Macintosh SE/30 by a 120-pin connector that is
vertically mounted to simplify installation.

Macintosh SE
96-pin Expansion
Connector

The 96-pin Euro-DIN connector on the Macintosh SE
logic board may be used in either of two ways:
•

To attach a third-party coprocessor board directly to
the logic board via a right-angle connector. The
coprocessor board (measuring about 4 X 8 inches)
would lie above and parallel to the logic board,
supported by standoffs that may be installed in the
logic board holes provided for that purpose.

•

To attach a cable that is then routed to an external
I/O device. From the connector on the logic board,
the cable is routed up through the forward hole in
the bottom of the metal chassis, through the
mounting bracket on the rear of the chassis, and out
through the snap-out accessory door on the rear of
the case. (Remove the rear accessory door from
inside the case.)

(

Note: Protruding tabs on some Macintosh SE chassis
may interfere with the installation of third-party
coprocessor boards, cards, or cables. If you encounter
such an installation problem, perform the "Chassis Tab
Modification" procedure (see Additional Procedures).

Macintosh SEI30
"030 Direct Slot"
Expansion
Connector

The internal expansion connector in the Macintosh SE/30,
known as the "030 Direct Slot," enables Apple and
third-party expansion cards to directly access the 32-bit
address and data bus of the 68030 microprocessor. This
new slot architecture delivers the improved
performance of the 32-bit bus and has other benefits for
expansion card developers. However, the greater pin
demands of the 32-bit bus require using a 120-pin
connector in the Macintosh SE/30. As a result, most
accelerator and video expansion cards designed to
utilize the 16-bit data bus in the Macintosh SE cannot
be used in the Macintosh SE/30.

l
1 .10 I Basics

rev. Aug 89

Macintosh SE and SE/30

)

o THEORY OF OPERATION
Introduction

The Macintosh SE and Macintosh SE/30 have eight basic
functional units:
•
•
•
•
•
•
•
•

Main logic board
Power supply
Analog board
Internal disk drive(s)
Internal SCSI hard disk (optional for Macintosh SE)
Video board
Video display (CRT)
Apple Desktop Bus keyboard and mouse

"Module swapping," or repair by replacement of faulty
modules, is much faster if you have a basic understanding
of the function of each module in the unit. If you know
what each module does when it is functioning normally,
you can more easily decide which module is at fault when
a particular function is missing or degraded. This is
called "logical troubleshooting." The following section
describes the Macintosh SE and Macintosh SE/30
modules and the functions they perform.

)
Main Logic
Board

The main logic boards of the Macintosh SE and
Macintosh SE/30 contain the components described
below. Components unique to one system or the other
are identified as such.

CPU

Macintosh SE: The Central Processing Unit (CPU) in the
Macintosh SE is a Motorola 68000 microprocessor. The
microprocessor gets instructions from memory, translates
them, and carries them out. It communicates with all
components on the logic board, and with all peripherals.
Macintosh SE/30: At the heart of the Macintosh SE/30 is
the Motorola 68030 microprocessor with a 32-bit
external address and data bus. This high-performance
microprocessor operates at 16 MHz-double the clock
speed of the 68000. The 68030 microprocessor also
supports paged memory management, thereby eliminating
the need for a separate PMMU chip. Paged memory
management is a type of parallel processing that enables
the computer to swap pages of data from a disk into
RAM memory, as needed, which makes the Macintosh
SE/30 appear to have more memory than it actually has.

)
Macintosh SE and SE/30

rev. Aug 89

Basics I 1.11

The Macintosh SE/30 logic board also includes the
68882 math coprocessor composed of IEEE P754
standard floating-point ICs. The 68882 provides a high
degree of precision and speed for Macintosh programs.

RAM

Macintosh SE: Macintosh SE RAM (Random-Access
Memory) is installed on 150-nanosecond Single In-line
Memory Modules (SIMMs). Each SIMM is a small printed
circuit card with mounted ICs. The logic board has four
sockets for SIMMs. The Macintosh SE comes with four
256K SIMMs installed for 1 MB of RAM, or with two
I-MB SIMMs installed for 2 MB of RAM.
Macintosh SE/30: The Macintosh SE/30 has two banks
of four SIMM sockets, and comes with 1 MB or 4 MB of
RAM. The amount of RAM on the logic board can be
changed by installing SIMMs of higher memory capacity.
Each bank must be filled with four SIMMs of the same
size, and Bank A (the first four rows closest to the
edge of the board) must be filled first, or filled with
the SIMMs of higher capacity. Both 256K and 1 MB
SIMMs are currently available, allowing 1 MB, 2 MB,
4 MB, 5 MB, or 8 MB configurations. The Macintosh
SE/30 can use only 120-nanosecond SIMMs.
Every time the Macintosh SE or Macintosh SE/30 is
powered on, the system performs a memory test to
determine how much RAM is present in the machine.

ROM

Macintosh SE: The two ROM (Read-Only Memory)
chips in the Macintosh SE contain the operating code for
the 68000. The Macintosh SE ROM supports the Apple
Desktop Bus, SCSI devices, AppleTalk networks, and
(since August, 1989) the FDHD disk drive. The ROM
chips at positions D6 and D7 on the logic board are
socketed. These ROMs should be replaced only when
installing the FDHD Upgrade Kit.
Macintosh SE/30: The four custom chips making up
system ROM for the Macintosh SE/30 are mounted on a
single SIMM module. This design facilitates feature set
upgrades, and allows the technician to easily install
upgraded or customized ROM. Included in the 256K of
permanent ROM memory for the Macintosh SE/30 are
routines for supporting the FDHD disk drive and SWIM
disk controller, NuBus slot manager, and Apple sound
manager.

1.12 I Basics

(

rev. Aug 89

Macintosh SE and SE/30

(

)

Disk
Controller
Chip

Macintosh SE: Macintosh SEs sold after August
1989, or Macintosh SEs upgraded to run the 1.4 MB
FDHD disk drive, use the SWIM disk controller chip
(see the description under "Macintosh SE/30" below).
Macintosh SEs sold before August 1989 use the IWM
chip, a self-contained disk controller on one IC that
supports all Apple format (GCR, for Group Code
Recording), 3.5-inch internal and external disk drives.
The IWM Simplifies the microprocessor's task of
reading from and writing to the disk drives. The IWM,
located at position 08 on the logic board, is socketed
and may be replaced by the technician.
Macintosh SE/30: The Macintosh SE/30 and all current
versions of the Macintosh SE use a SWIM disk
controller chip. The SWIM chip incorporates the
functionality of the IWM, and also enables the FDHD
disk drive to exchange data between Apple and MSDOS systems. The SWIM chip interprets, converts, and
outputs dual disk (clock/time) and file (data) signals as
appropriate for either GCR (variable rotational speed)
or MFM (constant rotational speed) formats. The SWIM
chip enables the FDHD drive to read, write, and format
in both GCR (Apple 400K and 800K) and MFM (MS-DOS
720K and 1.4 MB; and Apple 1.4 MB) data formats.

)

Serial
Communications
Controller

The Serial Communications Controller (SCC) handles
information sent to and received from the serial ports
on the back of the machine.

Versatile
Interface
Adaptor

The Versatile Interface Adaptor (VIA) converts serial
data (from input devices) to parallel data, so that the
logic board can interpret the information correctly.

Gate Array

The Macintosh SE and Macintosh SE/30 incorporate the
gate array implementation of PAL (Programmable Array
Logic) and other discrete logic devices. The gate array
handles control and synchronizing functions for the
main logic board.

Oscillator

The oscillator, or timing device, generates the master
clock pulse, which is broken down into the various
timing signals needed by the ICs on the logic board.

)
Macintosh SE and SE/30

rev. Aug 89

Basics I 1.13

Battery

The Macintosh SE and Macintosh SE/30 are equipped
with a single long-life lithium battery that provides
power to the system clock and calendar. This battery is
installed in a battery holder and can be replaced without
cutting and soldering. In earlier versions of the
Macintosh SE, the battery is soldered to the logic board.

Sound Chip

The sound chip supports the internal speaker connector
and the external sound jack. The Macintosh SE/30 logic
board contains a new, full-stereo sound chip.

SCSI Bus

The Apple SCSI manager supports up to seven daisychained SCSI devices.

Apple
Desktop
Bus

The Apple Desktop Bus is a method and protocol for
connecting computers with human input devices. The
Macintosh SE and Macintosh SE/30 control the flow of
data to connected devices by issuing commands through
the Apple Desktop Bus.

Power
Supply

The power supply is attached to the bottom half of the
analog board. This is where AC voltage is converted to
DC voltage for use by the entire system. The power
supply operates on standard line voltage and outputs
various DC voltages, which are used by the logic board,
the video display, and by some peripheral devices.

Analog Board

The analog board contains circuits for both horizontal
and vertical signals that are fed to the CRT. The
flyback transformer on the analog board delivers high
voltage directly to the CRT through the anode
connector.

CRT and

The Cathode-Ray Tube (CRT) provides the highresolution video display. The anode of the CRT
receives high voltage from the flyback transformer on
the analog board. The analog board also supplies the
voltages and signals to the neck and yoke of the CRT
that enable the CRT to create the video display. There
is a separate video board on the neck of the CRT that
provides video amplification and overvoltage protection.

Video Board

(

l
1.14 I Basics

rev. Aug 89

Macintosh SE and SE/30

Disk Drlve(s)

)

The internal disk drive (or drives) used in the
Macintosh SE and Macintosh SE/30 connect to the main
logic board through two internally installed connectors.
An external disk drive may be connected to the disk
drive port on the back of the logic board. The flow of
data between the logic board and the disk drives is
channeled through a disk controller chip, which
controls reading and writing operations.
The internal disk drive in the Macintosh SE and
Macintosh SE/30 is the high-density, 1.4 MB FDHD
(Floppy Drive High Density) disk drive. The FDHD
drive reads/writes and formats both GCR and MFM
format disks, thereby providing data exchangeability
between MS-DOS, ProDOS, and Macintosh systems. An
application-specific translator within the Apple File
Exchange utility program must be used to translate the
exchanged data for use within an application program.

)

SCSI
Hard Disk

The SCSI hard disk (optional on the Macintosh SE)
connects to the logic board through the internal SCSI
connector. Other SCSI devices may be daisy-chained to
the Macintosh SE and Macintosh SE/30 through the
external SCSI port. The SCSI bus on the logic board
will support a total of seven SCSI devices.

Apple Desktop
Bus Keyboard
and Mouse

The keyboard connects to the Apple Desktop Bus (ADB)
port on the Macintosh SE and Macintosh SE/30. The
mouse connects to the keyboard or to the computer's
other ADB port. All devices made for the Apple
Desktop Bus have a microprocessor that makes them
intelligent devices. All Apple Desktop Bus devices
communicate with the logic board via a mini DIN-4
connector. All except the mouse have ports for daisychaining other ADB devices. The mouse must be the
last device in the chain because it has no port.

)
Macintosh SE and SE/30

rev. Aug 89

Basics I 1 .15

o CARE AND HANDLING
The Macintosh SE and Macintosh SE/30 are small
enough to be somewhat portable. However, the
computers contain a CRT (cathode-ray tube-the picture
tube), which operates at very high voltages and contains
a high vacuum. If cracked or broken, the CRT can
implode (collapse into itselO, then explode.

WARNING: Before working inside this computer, read
Section 8, CRT Safety, under the You Oughta Know tab.
Both computers may also contain hard disks (a hard disk
drive comes standard with the Macintosh SE/30, and is
optional for the Macintosh SE). The hard disk is a
mechanical device with moving parts. Rough handling
such as jarring or bumping, especially while the hard
disk is running, could result in a mechanical failure or
damage to the information stored on the hard disk.
Careless handling accounts for more drive failures than
all other factors combined.
With these facts in mind, always be sure to:

1 .16 I Basics

•

Leave the Macintosh SE and Macintosh SE/30, and
the CRT and hard disk drive modules, in shipping
containers until use.

•

Use the shipping containers and packing materials
when transporting the computer or modules.

•

Place the computer on a protective padded surface
before beginning any repair procedure.

•

Never move a computer with a hard disk drive
during power-down. After the power is turned off,
the hard disk will slow down and the heads will
land within 15 seconds. Any jolts to the drive
during power-down may cause the heads to crash
into the media surfaces.

•

Never drop a Macintosh SE or Macintosh SE/30.
Even a drop of one inch to a hard surface could
cause implosion of the CRT and/or a hard disk drive
failure.

rev. Mar 90

Macintosh SE and SE/30

(

)

• Apple Technical Procedures

Macintosh SE and Macintosh SEl30
Section 2 - Take-Apart
o CONTENTS
2.2
2.5
2.5
2.7
2.8
2.14
2.16
2.22
2.25
2.28
2.31
2.31
2.33
2.33
2.35
2.37
2.40
2.42
2.46

)

Note: If a step is underlined, detailed instructions for
that step can be found elsewhere in this section.

)
Macintosh SE and SEl30

rev. Jun 91

Take-Apart 12.1

DeaVER

(
WARNING: Macintosh SE and SEI30 computers contain
high voltage and a high-vacuum picture tube. To prevent
serious personal injury and property damage, be sure you
read and understand the safety precautions in Section 8,
CRT Safety, under the You Oughta Know tab before you
remove the back cover. Failure to follow the safety rules
could result in serious injury.
CAUTION: Electrostatic Discharge (ESD) can cause
severe damage to sensitive microcircuits. The Macintosh
SE and Macintosh SEI30 logic boards contain C-MOS
components, among the most sensitive chips in use
today. Printed circuit assemblies and ICs (integrated
circuits, or "chips''), especially those that are removable,
must also be handled with extreme care. The Macintosh
SE and Macintosh SEI30 also have removable ROMs,
ROM SIMMs, and RAM SIMMs, which contain the RAM
memory. The C-MOS chips, ROMs, and SIMMs are very
susceptible to ESD damage. To prevent ESD damage to
these components, follow the precautions outlined for
ESD prevention in You Oughta Know.

Materials Required

Foam pad
Small flat-blade screwdriver
IS-inch Torx screwdriver
Pull-apart tool

Remove

Remove the cover as follows:

(

1. Place the Macintosh SE or Macintosh SE/30 on the
foam pad in an area where you will have ample room
to remove the cover. Don't put it under shelves
containing objects that could fall on the CRT and
break it.
Note: Be especially careful when handling a
Macintosh SE/30, or a Macintosh SE with an internal
hard disk. Read "Care and Handling" in the Basics
section before continuing.
2. Turn off the power and disconnect the power cord.
3. Disconnect the keyboard and mouse cables and all
other peripheral cables from the back of the
Macintosh SE or Macintosh SE/30.
2.2 I Take-Apart

rev. Mar 90

Macintosh SE and SE/30

FIGURE 1
4. If a reset!interrupt switch (Figure 1, #1) is present,
pry it off with a small flat-blade screwdriver.
5.

)

Place the Macintosh SE or Macintosh SE/30 facedown on the pad.

6. Use the Torx screwdriver to remove the four case
screws (Figure 1, #2).

Replace

Carefully lift up the cover and set it out of the way.
If the cover is difficult to remove, use the pull-apart
tool. (To prevent cosmetic damage to the cover and
bezel, do not use a screwdriver to pry off the cover.)

Remove the insulating paper shroud from the bottom
of the Macintosh SE or Macintosh SE/30.

Replace the cover as follows:
WARNING: The edges of the metal chassis may be
sharp. When moving the computer with the cover
removed, be sure to handle the metal chassis carefully.

Macintosh SE and SE/30

Place the computer face-down on the foam pad.

Replace the insulating paper shroud over the bottom
of the Macintosh SE or Macintosh SE/30.

rev. Apr 89

Take-Apart I 2.3

FIGURE 2
3. Slide the cover over the chassis and fit it into the
front bezel, making sure the video ground cable
(Figure 2, #1) is out of the way of the case screw
holder (Figure 2, #2).
4.

Reinstall the four case screws (Figure 3, #2).
Note: The two black screws should be installed in
the bottom of the case and the two silver screws in
the top.

Reinstall the reset/interrupt switch (Figure 3, #1).

FIGURE 3

2.4 / Take-Apart

rev. Jan 89

Macintosh SE and SE/30

(

o DISCHARGING THE CATHODE-RAY TUBE (CRn
The CRT in the Macintosh SE and Macintosh SE/30 is
equipped with a bleeder resistor that automatically
drains the charge from the CRT when the power is shut
off. Nevertheless, you must follow the discharge
procedure below to protect yourself in the event that
the resistor has failed and the anode is still charged.

Materials Required

Safety goggles
Foam pad (ungrounded)
N eedlenose pliers
Alligator lead
New CRT discharge tool (part number 076-0381)
WARNING: Before starting, read the safety precautions
and the CRT discharge procedure in Section 8, CRT
Safety, under the You Oughta Know tab. Alternative
instructions for discharging the CRT using the older
version of the discharge tool (and/or a screwdriver) are
a/so given in that section.

)

Discharge
Procedure

Remove your grounding wrists trap and jewelry and
put on safety goggles before beginning!

WARNING: Do not touch the yoke wires (Figure 4, #1),
the anode wire (Figure 4, #2), the anode connector
(Figure 4, #3), or the f/yback transformer (Figure 4, #4).

)

FIGURE 4

Macintosh SE and SE/30

rev. Mar90

Take-Apart I 2.5

Remove the cover.

3. Set the monitor upright on the ungrounded foam pad,
with the back of the monitor facing you.

FIGURES

(

4. Attach the alligator clip on the CRT discharge tool
to the metal part of the ground lug (Figure 5, #1).
CAUTION: Discharge the anode to the metal part of the
ground lug displayed in Figure 5, #1. Failure to do so will
damage the main logic board and/or the analog board.

5. Put one hand behind your back and grasp the handle
of the discharge tool with your other hand.
WARNING: Use only one hand when discharging the
CRT. This is to prevent you from becoming a path for
current should your hand slip and touch the metal part of
the discharge tool. While discharging the CRT, grasp only
the insulated handle of the discharge tool.

6. Hold the CRT discharge tool to the tube surface, and
insert it under the anode cap (Figure 5, #2) until it
touches the anode ring.

2.6 I Take-Apart

rev. Mar 90

Macintosh SE and SE/30

7. Remove the CRT discharge tool from under the
anode cap. Remove the alligator clip from the
ground lug. Set the tool aside where it will be out
of the way.

)

Note: If the bleeder resistor fails, a secondary charge
can build up over time, even after you have discharged
the CRT. If repairs are not finished within 30 minutes,
the anode should be discharged again. Or, to ensure
that any residual charge is dissipated during the service
procedure, establish a path for anode current to ground
by fastening one end of an alligator lead to the metal
ground lug and connecting the other end to the anode
ring.

Anode
Cap

For some of the following procedures, you may have
to remove the anode cap. To do so, peel back the
anode cap until you can see the anode ring at the
center. Look at the metal connector in the center of the
cap and notice how it is clipped into the CRT. Use the
needlenose pliers to compress the two prongs on the
clip to free it from the CRT, and lift it off the tube.

)

)
Macintosh SE and SE/30

rev. MargO

Take-Apart I 2.7

o ANALOG BOARD AND POWER SUPPLY

(

Materials Required

Grounded workbench pad and wriststrap
Small Phillips screwdriver

Remove

To remove the analog board and power supply:
1.

Remove the cover and discharge the CRT.

2. Remove the anode cap (Figure 6, #1).

(

FIGURE 6
3. Move the Macintosh SE or Macintosh SE/30 onto a
soft, grounded workbench pad and put on your
grounding wriststrap. (Never do this until after the
CRT is discharged.)
4. Carefully pull the video board (Figure 6, #3) off the
neck of the CRT.

2.8/ Take-Apart

rev. Jan 89

Macintosh SE and SE/30

)

Remove the following cables from the analog board:
•

Yoke cable (Figure 6, #2) (First depress the tab.)

•

Main logic board cable (Figure 6, #4)

•

Video board cable (Figure 6, #5)

•

Hard disk power cable, if present (Figure 6, #6)

Remove the screw holding the power supply ground
wire to the chassis (Figure 6, #7).

)

FIGURE7
7.

Using the small Phillips screwdriver, remove the
two lower left analog board screws and the metal
clip (Figure 7, #1).

Remove the two lower right analog board screws
(Figure 7, #2).

Place the Macintosh SE or Macintosh SE/30 face
down on the grounded workbench pad.

)
Macintosh SE and SE/30

rev. Jan 89

Take-Apart I 2.9

(

FIGURES
10. Carefully move the analog board (with power supply
attached) up and away from the chassis, taking care
not to bump the CRT or the brightness control knob
(Figure 8, #1) at the lower front of the analog
board.
WARNING: Do not grasp the analog board by the fan.
Hold the analog board by the edges, using your fingertips.

11. Disconnect the power supply cable (Figure 8, #2)
from the analog board.

@@
@

FIGURE 9
2.10 I Take-Apart

rev. Jan 89

Macintosh SE and SE/30

(

12. Place the board on the grounded workbench pad with
the power supply down, and remove the four power
supply screws (Figure 9, #1). Lift the board free.

)

c:::::J

~¢

9D~~~

mmnm"

mnm

I!!Iil

FIGURE 10

)

13. If you are returning the analog board to Apple, first
remove the brightness knob (Figure 10, #1) and put
the knob on the replacement analog board.

Replace

Follow the steps below to replace the power supply and
analog board. Also, if you are installing a new analog
board on a Macintosh SE, and a clip-on ferrite bead is
packaged with the new analog board, you may have to
install the ferrite bead on the video board cable. Check
your video board; if a ferrite bead is not on the cable,
install the clip-on ferrite bead enclosed with the new
analog board on the video board cable (see the Video
Board procedure).
1.

Place the power supply on the inside of the analog
board, using the painted outline on the board as a
guide (Figure 10, #2).

2. Holding the power supply in position, flip the
analog board and power supply to a face-down
pOSition with the power supply underneath. Do not
grasp the analog board by the fan.

)

3. Replace the four power supply screws (Figure 9, #1).

Macintosh SE and SEJ30

rev. Jan 89

Take-Apart 12.11

(

FIGURE 11
4. Reconnect the power supply cable (Figure 11, #1).
5. With the Macintosh 5E or Macintosh 5E/30 face down
on the grounded workbench pad, carefully place the
analog board/power supply unit in the chassis,
taking care not to bump the CRT or the brightness
knob at the lower front of the analog board. It is
easiest if you slide the corner with the brightness
knob in first, then maneuver the power supply cage
past the metal bracket at the back of the chassis.
Again, do not grasp the analog board by the fan.

6. Replace the metal clip and the two lower-left analog
board screws (Figure 12, #1).

FIGURE 12
2.12 I Take-Apart

rev. Jan 89

Macintosh SE and SE/30

(

)

FIGURE 13

)

7. Replace the two lower-right analog board screws
(Figure 12, #2).
8.

Reconnect the following cables to the analog board:
•

Yoke cable (Figure 13, #1)

•

Main logic board cable (Figure 13, #3)

•

Video board cable (Figure 13, #4)

•

Hard disk drive power cable (Figure 13, #5), if
present

Replace the anode cap (Figure 13, #6).

10. Reconnect the video board (Figure 13, #2) to the
neck of the CRT. It fits only one way.
11. Replace the screw that secures the power supply
ground wire to the chassis (Figure 13, #7).
12. Replace the cover.

)
Macintosh SE and SE/30

rev. Jan 89

Take-Apart I 2.13

o MAIN LOGIC BOARD

(

Materials Required

Grounded workbench pad and wriststrap
Small Phillips screwdriver
IC extractor

Remove

Follow these steps to remove the main logic board:

Remove the cover.

Discharge the CRT.

Put on your grounding wriststrap. (Never do this
until after the CRT has been discharged.)

CAUTION: In the following step, pull only on the pulltabs
or on the connectors themselves, not on the cables.

Carefully pull the video board (Figure 14, #4) off
the neck of the CRT.

(

FIGURE 14

2.14 I Take-Apart

rev. Aug 89

Macintosh SE and SE/30

)

Remove these connectors from the main logic board:
•

Hard disk drive cable, if present (Figure 14, #1)

•

Internal disk drive cable(s) (Figure 14, #2)

•

Power supply cable (Figure 14, #3) (You must
depress the holding clip on this connector
before you can pull it out.)

6. Place the Macintosh SE or Macintosh SE/30 face
down on a grounded workbench pad, with the
bottom of the main logic board facing you. You will
see that the right edge of the board is notched and
the left edge is smooth.

)

;" .. ~. -

........................ _..................... --_ .... -" -............ -..

......................................................................:-.,.

:T. . UjjjIX([jjXl"(([[jjjjX(([iEjjjIf@X.·.·.;.;.·.;.;.;.·.·.;. .;.;.;. . .;. . .;.;.;.;. . . . . . .;.;. . .;.;. .;. .;.;.;.;.J;:

FIGURE 15
7.

Holding the board by the edges, slide it up until the
tabs on the right edge of the board exactly match the
notches in the right metal bracket (Figure 15, #1).

Swing the right edge of the board free of the metal
bracket and lift the board out of the metal chassis.

)
Macintosh SE and SE/30

rev. Aug 89

Take-Apart 12.15

L
D

IQ
00

.......

(

[][]DD

[][]D[]
[][]D[]
[][]D[]

D
[][]D[]

.. \:
.. l ...... r ••••••••• ;:.:.

FIGURE 16
9.

Identifying
Macintosh SE
Logic Boards

With the main logic board held upright beside the
computer, disconnect the speaker cable
(figure 16, #1). Place the board on the grounded
workbench pad.

Two logic boards are available as exchange modules for
the Macintosh SE. If you are replacing the logic board
of a Macintosh SE that was originally shipped with an
FDHD drive, use logic board 661-0536. If your
customer's computer was originally shipped with an
800K internal drive, or has been upgraded to use an
FDHD drive, use replacement logic board 661-0526.
Be sure to use an exchange logic board that is

configured the same as the customer's original board.
Use the following procedure to identify the correct
exchange module:

2.16 I Take-Apart

rev. Aug 89

Macintosh SE and SE/30

(

)

Identify the customer's battery configuration
(Figure 17, #1):
a) If the battery is installed in a battery holder
(Figure 17, #2), use replacement logic board
661-0536 and go directly to the steps for
replacing the logic board (see "Replace").
b) If the battery is soldered to the logic board
(Figure 17, #3), perform step 2 next.

)
/

FIGURE 17

)
Macintosh SE and SE/30

rev. Aug 89

Take-Apart I 2.17

Identify the customer's disk controller chip
(Figure 18, #1):
a) If the part number on the disk controller chip
is 344-0062 (SWIM chip), use replacement
logic board 661-0526 and perform step 3 next.
b) If the part num ber on the disk controller
chip is not 344-0062, use replacement logic
board 661-0526 and go directly to the steps
for replacing the logic board (see "Replace").

(
FIGURE 18
IMPORTANT: Failure to transfer the customer's SWIM chip
and upgraded ROMs to the replacement logic board will
prevent an FDHD drive from utilizing high-density media.

Using the Ie extractor, remove the following chips
from the customer's logic board and install them in
the same positions on the replacement logic board.
(The notched end of the chips should face the front
of the logic board. For more information see "1.4 MB
Apple FDHD Upgrade for the Macintosh SE" in
Section 5, Additional Procedures.)
•
•
•

SWIM (Figure 18, #1)
Low ROM (Figure 18, #2)
Hi ROM (Figure 18, #3)

Return the ROMs and IWM chip to Apple on the
customer's faulty logic board.

2.18 I Take-Apart

rev. Aug 89

Macintosh SE and SE/30

Replace

Position the main logic board at the rear of the
Macintosh 5E or Macintosh 5E/30. The tabbed edge
of the board should be on the right.

Reconnect the speaker cable (Figure 19, #1) to the
main logic board.

)

L
CJ
10

IQ
00

CJ
ID

[][][][]
[][][][]
[][][][]
[][][][]

[][][][]

)

FIGURE 19
3.

Fit the smooth left edge of the main logic board into
the slot in the metal frame.

)
Macintosh SE and SE/30

rev. Aug 89

Take-Apart I 2.19

4. Exactly align the tabs on the right edge of the board
with the notches on the right metal bracket
(Figure 20, #1), and settle the right edge of the
board into the right metal bracket. Slide the board
down until you hear it cl ick into place.

(

FIGURE 20
5. Place the Macintosh SE or Macintosh SE/30 upright,
so that you can see the inside of the chassis.

2.20 I Take-Apart

rev. Aug 89

Macintosh SE and SE/30

(

)

FIGURE 21

)

6. Reconnect the following to the main logic board:
•
•
•

Internal disk drive cable(s) (Figure 21, #1)
Power supply cable (Figure 21, #2)
Hard disk drive cable, if present (Figure 21, #3)

Reconnect the video board (Figure 21, #4) to the
neck of the CRT. It fits only one way.

Replace the cover.

Note: If the diagnostics indicates that the replacement
logic board is bad, and the original board had been
upgraded for the FDHD drive, you may have swapped
bad ROM or SWIM chips. Run AppleCAT and observe
the test results displayed on the Status line. If any
ROM or SWIM chips are faulty, replace the bad chips
and reinstall the customer's original logic board.

)
Macintosh SE and SE/30

rev. Aug 89

Take-Apart I 2.21

o SIMMs

(
Macintosh SE: The Macintosh SE logic board has four
SIMM sockets, as shown in Figure 22. It comes with 1
megabyte of RAM installed on four 256K Single In-line
Memory Modules (SIMMs), or with 2 megabytes of RAM
installed on two 1 MB SIMMs. The original 256K and 1
MB SIMMs for the Macintosh SE are 150 nanosecond;
replacement SIMMs are 120 nanosecond. (The 120- and
l50-nanosecond SIMMs are interchangeable in the
Macintosh SE.)
Macintosh SE/30: The Macintosh SE/30 logic board has
two banks of four SIMM sockets, as shown in Figure 23.
It comes in a I-megabyte configuration that has four
256K SIMMs installed in bank A, or in a 4-megabyte
configuration with four 1 MB SIMMs installed in bank A.
All Macintosh SE/30 SIMMs are 120 nanosecond.
Note: Refer to Section 7, Additional Procedures, for
procedures specifically addressing memory upgrades.

Materials Required

Grounded workbench pad and wriststrap

FIGURE 22

2.22 I Take-Apart

rev. Aug 89

Macintosh SE and SE/30

(

)

II!:
!:

t ::"ii;'-'~ ; Ii iii
IHIIHIHHIHIHHH)

o :::

_':.:~!

::i:.':::'.

_.!:::.);:
..:;l:
.. ;:i:..:':::.:i:;;:..::::..

Ifll

·D!.~D! !t

(]] lE] Ii[] lilliHiillHillIHm

otit:it:i:i:i:iitJ
[::::::;::1:::1:::::1:1::::1

Bank B

Bank A

(:;:;:;:;:;:;:;:;:;:;:;:1 I:;:;:;:;:;:;:;:;:;:::::j ill!]
(::;:::;:::::;:::::::;:;1 I;:;:;:::;:;:;:;:;:;::::j I:::::::::::::;;::::::::)

~::::::::: ::::=
0= ::::::::::::~

Em)

£!me;]:

tt=:::::::1 ::: .

1t:=:=tl~J
o

I:,

,Ill i

E:Z:a~

1iit3
o

FIGURE 23

)

Remove

Follow the steps below to remove a SIMM from the
main logic board:
1.

Remove the cover and discharge the CRT.

Put on your grounding wriststrap and place the
Macintosh SE or Macintosh SE/30 on the grounded
workbench pad. (Never put on the grounding
wriststrap until after the CRT has been discharged.)

Remove the main logic board.

4. To remove a SIMM, use the SIMM removal tool. See
You Oughta Know for instruction on tool usage.
CAUTION: SIMMs are very susceptible to ESD and skin
acid damage. Handle only by the edges.

)
Macintosh SE and SE/30

rev. Aug 89

Take-Apart I 2.23

:-:.:-:-:-:.:- I,!!!!,*,*,mnmiinuunul EEl::

(

FIGURE 24

Replace

2.24 I Take-Apart

Follow the steps below to replace a SIMM:
1.

With the contacts (Figure 24, #1) on the SIMM
pointing down, insert the module into the connector
at an angle (bottom forward).

Push back on the top corners of the module. You
will hear a click when the module snaps into place.

Replace the main logic board and the cover.

rev. Aug 89

Macintosh SE and SE/30

(

)

o VIDEO BOARD
Materials Required

Grounded workbench pad and wriststrap
Torx screwdriver

Remove

Follow the steps below to remove the video board:
1.

Remove the cover.

Discharge the CRT.

WARNING: Leave your safety goggles on for the
remainder of this procedure.

Put on your grounding wriststrap and place the
Macintosh SE or Macintosh SE/30 on the grounded
workbench pad. (Never put on the grounding
wriststrap until after the CRT has been discharged.)

CAUTION: Whenever working on the upper part of the
chassis, always pull the video board off the neck of the
CRT or remove it totally. This will help avoid damage to
the CRT.

)

)
Macintosh SE and SE/30

rev. Aug 89

Take-Apart I 2.25

(

FIGURE 25
4.

Carefully pull the video board (Figure 25, #3) off
the neck of the CRT.

(

5. Disconnect the video board connector (Figure 25,
#1) from the analog board.

6. Remove the Torx screw holding the video ground
wire to the upper-left CRT mounting bracket
(Figure 25, #2).

Replace

CAUTION: The redesigned, vertically mounted video
board must be installed with the new axial fan. The new
axial fan will not allow for adequate vibration clearance
when installed with the old, horizontally mounted video
board.

New video boards come with an attached- ferrite bead
(Figure 26, #1) to reduce interference. If your video
board does not have a ferrite bead attached to the cable,
and you are installing a new analog board that is
packaged with a clip-on ferrite bead, install the ferrite
bead on the video board cable as shown in steps 1 and 2
below.

2.26 I Take-Apart

rev. Aug 89

Macintosh SE and SE/30

)

FIGURE 26
1.

Position the clip-on ferrite bead (Figure 26, #1)
around the video board cable as near the video
board connector (Figure 26, #2) as possible. Snap
the ferrite bead shut.

2. Install a plastic tie-wrap (Figure 26, #3) on the
cable to hold the ferrite bead near the connector.
Cut off excess tie-wrap.

)

3. Place the video ground wire tab over the upper-left
CRT mounting bracket and replace the Torx screw
(Figure 25, #2). Be sure the ground wire is routed
away from the case screw holder (Figure 25, #4).
4.

Reconnect the video board connector (Figure 25, #1)
to the analog board.
Note: A plastic guide may be installed over the
leads on the tip of the CRT. If so, pull the guide off
before reconnecting the video board to the CRT.

Reconnect the video board (Figure 25, #3) to the
neck of the CRT. It fits only one way.
Note: Before replacing the cover, make sure the
video picture is adjusted to the right height and
width. Refer to the "Size Adjustments" steps under
"Video Adjustments" in Section 3.

6. Replace the cover.

)
Macintosh SE and SE/30

rev. Aug 89

Take-Apart I 2.27

o CATHODE-RAY TUBE (CRT)

(

Materials Required

Grounded workbench pad and wriststrap
Torx screwdriver

Remove

Follow the steps below to remove the CRT:
1.

Remove the cover and discharge the CRT.

WARNING: Leave your safety goggles on for the
remainder of this procedure.

2. Remove the anode cap.
3. Move the Macintosh SE or Macintosh SE/30 onto a
soft, grounded workbench pad and put on your
grounding wriststrap. (Never put on the grounding
wriststrap until after the CRT is discharged.)
4. Remove the video board.
5.

Remove the analog board. (Do not remove the
power supply from the analog board.)

(

FIGURE 27

2.28 I Take-Apart

rev. Aug 89

Macintosh SE and SE/30

6. Using the Torx screwdriver, remove the three

)

remaining mounting screws from the corners of the
CRT (Figure 27, #1).
7. Lift the CRT free from the bezel.

Replace

Follow the steps below to replace the CRT:
1.

Place the CRT face down in the bezel, with the
anode aperture (Figure 27, #2) on the left, as shown.

Replace the three CRT mounting screws shown in
Figure 27, #1.

)

FIGURE 28
3.

Replace the analog board/power supply.

Replace the video board (Figure 28, #1).
Note: Directions for replacing the fourth CRT
mounting screw (Figure 28, #2) are included in the
video board procedure.

Replace the cover.

)
Macintosh SE and SE/30

rev. Aug 89

Take-Apart I 2.29

(

Revision A

Revision B

(

FIGURE 29

2.30/ Take-Apart

rev. Jun 91

Macintosh SE and SEl30

)

o INTERNAL SCSI HARD DISK DRIVE
The Macintosh SE and SE/30 can be configured with a
3.5-inch half-height or a 3.5-inch 1-inch-height SCSI
hard disk drive. The procedure for removing all Apple
SCSI internal disk drives is the same.
Unlike most drives for the Macintosh SE and SE/30, the
1-inch-height drives are oriented PCB-side down in
their carriers; thus, when removing the drive, the SCSI
power cable will be opposite its location in Figure 30.

Identifying 20SC
Revision A
and B Drives

Apple currently ships two versions of the internal Hard
Disk 20SC. To the customer, the Hard Disk 20SC
Revision A drive and the Hard Disk 20SC Revision B
drive are identical, but 20se Revision A and Revision B
drives must be replaced like-for-like. To differentiate
between drive versions, check their circuit boards. For
Revision A drives, the component side of the board is,
up (Figure 29, #1); for Revision B drives, the solder
side is up (Figure 29, #2). For part numbers, refer to
Illustrated Parts List or your Apple Seroice Programs
binder.

Materials Required

Grounded workbench pad and wriststrap
Medium Phillips screwdriver
Torque driver (for 1-inch-height drives)

Remove

Follow the steps below to remove an internal SCSI hard
disk drive.

)

Remove the cover and discharge the CRT.

2. Move the Macintosh SE or Macintosh SE/30 onto a
soft, grounded workbench pad, and put on your
grounding wriststrap. (Never put on the grounding
wriststrap until after the CRT is discharged.)
3. Remove the video board.

)
Macintosh SE and SEl30

rev. Aug 91

Take-Apart 12.31

4. Disconnect the hard disk drive cable from the main
logic board (Figure 30, #1).

(

5. Disconnect the hard disk drive power cable from
the analog board (Figure 30, #2).

6. Remove the two Phillips screws that secure the
hard disk drive carrier to the lower drive housing
(Figure 30, #3), and lift out the hard disk assembly.
7. Before returning the hard disk assembly to Apple,
remove the 50-pin SCSI connector cable.

Note: There are a number of ways in which damaged
hard drives must be returned to Apple. For information
on the appropriate return configuration for your drive,
see SCSI Hard Disk Drives Technical Procedures.

(

FIGURE 30

2.32/ Take-Apart

rev. Aug 91

Macintosh 8E and 8E/30

)

Removing the
Drive From
Its Carrier

To remove a drive from its carrier:
1.

Remove the four screws on the lower sides of the
carrier (Figure 31).

Unplug the LED from the drive, and lift the drive
out of the carrier.

3. Package the drive for return to Apple.

4 fie .....

)

FIGURE 31

Replacing the
Drive In
Its Carrier

Most drives can be replaced in a carrier by reversing
the steps above. Because of the compact nature of
I-inch height drives, special steps are required when
tightening the drives into their carriers. Use the
following steps to assure the proper functioning and
longevity of these drives.
1. Plug th.e LED into the drive.
2. Using the Phillips screws that you removed in
step 1, loosely secure the drive in its carrier.
3. Tighten the screws in the sequence shown in
Figure 31, torquing the four screws to 8.0 in-Ibs.

)
Macintosh SE and SE/30

rev. Aug 91

Take-Apart 12.33

Replace

1. Replace the 50-pin SCSI connector cable on the hard
disk assembly.

(

Note: If you are using the carrier with low sidemounting holes (see Figure 31), the key on the hard
disk SCSI connector will be inverted. To make the
hard disk drive cable fit properly, fold one end of
the cable forward and the other end backward into
the shape shown in Figure 32.
2. Slide the hard disk assembly over the lower drive
so that the tabs on the bottom of the hard drive
carrier mesh with the top holes on the lower drive
housing.
3. Replace the two screws that secure the hard disk
carrier to the lower drive housing (Figure 30, #3).

4. Reconnect the hard disk drive power cable to the
analog board (Figure 30, #2).
5. Reconnect the hard disk SCSI connector to the main
logic board (Figure 30 #1).

6. Replace the video board.
7.

(

Replace the cover.

DDDODDDDDCDCCDDDODD
DCDDDDDDDCOCDDDDDOD

Fold in Back

Fold in Front

FIGURE 32

2.341 Take-Apart

rev. Jun 91

Macintosh SE and SEl30

)

o LED CABLE ASSEMBLY
Materials Required

#2 jeweler's screwdriver

Remove

To remove the LED cable assembly:
1. RemQve the CQver and discharge the CRT.
2. Remove the hard disk assembly.

FIGURE 33
3. Pry the small plastic retaining ring from around the
LED holder with a jeweler's screwdriver (Figure
33). Slide the retaining ring up the wires and Qut
of the way.

)

FIGURE 34
4. Press the face of the LED toward the inside of the
metal frame while gently prying apart the LED
hQlder with the screwdriver until the LED snaps
free of the metal frame (Figure 34).
5. Disconnect the LED connector from the hard drive
assembly, and remove the LED cable assembly.

)
Macintosh SE and SEl30

Jun 91

Take-Apart 12.35

Replace

To replace the LED cable assembly:

(

FIGURE 35
1.

If necessary, slip the LED into its holder and snap it
into place with a jeweler's screwdriver (Figure 35).

(

FIGURE 36
2. Slide the retaining ring down the wires and
position it around the LED holder. Push the ring
back into place with the screwdriver (Figure 36).
3. Connect the LED cable to the LED connector on the
controller board.
4. Replace the hard disk assembly.
5. Replace the cover.

2.36/ Take-Apart

Jun 91

Macintosh SE and SE/30

)

o UPPER INTERNAL DISK DRIVE
Materials Required

Grounded workbench pad and wriststrap
Medium Phillips screwdriver

Remove

Follow the steps below to remove the optional upper
internal drive from the Macintosh SE (only):
1. Remove the cover and discharge the CRT.
2. Move the Macintosh SE onto a soft, grounded workbench pad and put on your grounding wriststrap.
(Never put on the grounding wriststrap until after
the CRT is discharged.)

)

FIGURE 37
3. Remove the video board.
4. Disconnect the upper internal disk drive cable from
connector }7 on the main logic board (Figure 37, #1).
5. Remove the two screws (Figure 37, #2) from the
metal bracket that holds the two drive housings
together. Lift off the metal bracket.

)

6. Slide the upper internal drive forward and lift it out.
Macintosh SE and SEl30

rev. Jun 91

Take-Apart /2.37

Replace

1. Remove the dummy packing disk from the
replacement internal drive mechanism.

(

IMPORTANT: Apple strongly advises the use of dust
shields on 1.4 MB floppy drives in all Macintosh SE and
SEI30 computers. All 1.4 MB replacement drives ship
with the dust shield already installed. If you plan to install
a dust shield on a current drive, however, you must clean
the drive first. Follow the procedure in "Cleaning the
Drive" in the Basics section of the FDHDISuperDrive tab
of the Apple Service Technical Procedures.

2. To place the upper drive into the chassis over the
installed lower drive, slide the upper internal drive
forward, then back over the lower internal drive so
that the tabs on the top of the lower drive housing
mesh with the holes on the bottom of the upper
drive housing (Figure 38, #1).

(

FIGURE 38
3. Place the metal bracket over the two drive housings
so that the slot in the bracket (Figure 39, #1) fits
over the tab on the upper housing.

FIGURE 39
2.38 I Take-Apart

rev. Jan 92

Macintosh SE and SE/30

)

4. Replace the two Phillips screws (Figure 39, #2) that
secure the metal bracket to the lower internal drive
housing.

)

FIGURE 40
5. Reconnect the upper internal disk drive cable to
connector J7 on the main logic board
(Figure 40, #1).

Note: You must use the longer of the two available
yellow-coded internal disk drive cables for the
upper drive. The shorter cable will not reach to the
main logic board. (The two cables are identical
except for length.)
6. Replace the video board.
7. Replace the cover.

)
Macintosh SE and SE/30

rev. Jun 91

Take-Apart I 2.39

o LOWER INTERNAL DISK DRIVE

(

Materials Required

Grounded workbench pad and wriststrap
Medium Phillips screwdriver

Remove

Although the disk drives may be different, follow the
steps below to remove the lower internal disk drive
from a Macintosh SE or from a Macintosh SE/30.
1.

Remove the cover and

dischar~e

the CRT.

2. Move the Macintosh SE or Macintosh SE/30 onto a
soft, grounded workbench pad and put on your
grounding wriststrap. (Never put on a grounding
wriststrap until after the CRT is discharged.)
3. Remove the video board.
4. Remove the hard disk drive or uPDer internal drive,
whichever is present.
5. Remove the main

10~ic

board.

(
~

IQ
D

DODD
DODD
DODD
DODD

DODD

FIGURE 41

2.40/ Take-Apart

rev. Jun 91

Macintosh SE and SEJ30

6. With the bottom of the chassis facing you, remove

)

the four Phillips screws (Figure 41, #1) that secure
the lower internal drive to the bottom of the metal
chassis. Lift the drive free.

Replace

Remove the dummy packing disk from the
replacement drive mechanism.

)

FIGURE 42
2.

Place the drive into the chassis so that the tabs on
the bottom of the metal drive housing fit into the
holes provided in the chassis frame (Figure 42, #1).

3. Replace the four Phillips screws (Figure 41, #1)
that secure the internal drive to the bottom of the
metal chassis.
4.

Replace the main logic board.

Replace the hard disk or upper internal drive.

6. Replace the video board.
7.

)
Macintosh SE and SE/30

Replace the cover.

rev. Jan 92

Take-Apart I 2.41

o FAN ASSEMBLY

(
CAUTION: There are two fan styles: the older cross-flow
(cylindrical) fan and the newer axial (round) fan. The axial
fan, since it is wider, must be installed with the redesigned,
vertically mounted CRT video board. The axial fan will not
allow adequate vibration clearance with the old,
horizontally mounted CRT video board.

Materials Required

Grounded workbench pad and wriststrap
Exacto knife
Soldering iron
Torx screwdriver

Remove

Follow the steps below to remove the fan assembly:
1.

Remove the cover and dischanle the CRT.

Move the Macintosh SE or Macintosh SE/30 onto a
soft, grounded workbench pad and put on your
grounding wriststrap. (Never put on a grounding
wriststrap until after the CRT is discharged.)

(

3. Remove the video board.
4. Remove the analog board.
5. Remove the power supply from the analog board.

6. Remove the fish paper from the board. (To do this,
compress and remove the arrow clips.)
7. The electrical connection of the fan to the analog
board has been achieved in several different ways.
In most designs, one or two wires from the fan are
soldered to the analog board. First check to see if
any wires are present. They may be routed along
the front (Figure 43, #1) or the back (Figure 44,
#1) of the analog board.
If there are no fan wires, go to step 8.

If a wire or wires are present, locate the solder
point(s) on the back of the board and desolder them.
Using the exacto knife, cut away any excess
bonding material holding the wire(s) in place.

2.42/ Take-Apart

rev. Jun 91

Macintosh SE and SEl30

)

:-9
..................................................................................................:

FIGURE 43

)

FIGURE 44
8. Next, locate the two solder points (Figure 44, #2)
on the back of the board that connect to the fan, and
desolder if there is solder present.
9. Remove the four screws (one is shown at Figure 44,
#3) that hold the fan assembly to the analog board
and lift the fan off.

)
Macintosh 5E and 5E/30

rev. Jun 91

Take-Apart / 2.43

Replace

1. Orient the new (axial) fan assembly (Figure 45, #1)
so that the holes in the bracket match the screw
holes on the analog board.

(

oWIWJ

I
j

................................................................................f···;
FIGURE 45
2.

Holding the fan in place, turn the analog board over
and install the four mounting screws (one is shown
in Figure 46, #1).

FIGURE 46
2.44/ Take-Apart

rev. Jun 91

Macintosh SE and SE/30

(

3. Route the two fan wires through the hole below the
fan on the analog board (Figure 45, #2).

)

Note: This hole was used for the insertion of one of
the arrow clips that hold the fish paper on the
board. The arrow clip for this hole can no longer be
used.

4. On the noncomponent side of the board, solder the
black wire to the first lower solder point (Figure 46,
#2) of connector P3.
5. On the noncomponent side of the board, solder the
yellow wire to the fifth lower solder point
(Figure 46, #3) of connector P3.

6. Replace the fish paper by reinstalling the arrow
clips. (Do not put an arrow clip in the hole shown in
Figure 45, #2.)
7. Replace the power supply.
8. Replace the analog board.
9. Replace the video board.

)

10. Replace the cover.

)
Macintosh SE and SEl30

rev. Jun 91

Take-Apart 12.45

o SPEAKER, FRONT BEZEL, AND SLOT COVER

(

Materials Required

Grounded workbench pad and wriststrap
Exacto knife
Soldering iron
Torx screwdriver

Remove

Follow the steps below to remove the speaker, slot cover,
or bezel from a Macintosh SE (only):
1. Remoye the coyer and discharie the CRT.
2. Move the Macintosh SE onto a soft, grounded
workbench pad and put on a grounding wriststrap
(after discharging the CRT).
3. Remove the video board and the main IOijc board.
4. Remove the analoi board. (Do not remove the
power supply from the analog board.)
WARNING: The edges of the metal chassis may be
sharp. Handle the metal chassis carefully.

5. Remove five Torx screws (Figure 47, #1) and lift
out the metal chassis with hard disk and/or drive(s).

6. If you are removing the speaker, use an exacto
knife to cut away the melted plastic that secures
two corners of the speaker to the inside of the
front bezel (Figure 48, #1), and lift the speaker out.

FIGURE 47

2.46/ Take-Apart

rev. Jun 91

Macintosh SE and SEl30

(

:::====="=""======. =J===:::::::~..

)

~::::::t".:. . .: .".:. . =
.. . =
..=
. . .=
. .=. . .:::. .~. .tIc""~""'~""~'••.........

FIGURE 48

7. If you are removing the slot cover from a Macintosh
SE, use an exacto knife to cut away the melted
plastic that secures two corners of the slot cover to
the inside of the front bezel (Figure 48, #3). Gently
push the slot cover through the slot and lift it out.
8. If you are removing the bezel, first remove the CRT.

)
Replace

Follow the steps below to replace the speaker, slot cover,
or bezel:
1.

Place the bezel face down on the grounded workbench pad.

2. If you are replacing the speaker, position the
speaker in the bezel (see Figure 48). Touch a
heated soldering iron to the two previously
unmelted plastic posts that now protrude through
the corners of the speaker (Figure 48, #2). The
plastic will spread as it melts, then harden and hold
the speaker in place.
3. If you are replacing the slot cover on a Macintosh SE,
position the slot cover in the bezel (see Figure 48)
with the plastic LED window beside the small hole on
the front bezel. Touch a heated soldering iron to the
two unmelted plastic posts on the slot cover (Figure
48, #4). The plastic will melt, then harden and hold
the slot cover in place.

)
Macintosh SE and SEl30

rev. Jun 91

Take-Apart 12.47

4. Replace the CRT, if you removed it.

(

WARNING: The edges of the metal chassis may be
sharp. Handle the metal chassis carefully.

5. Replace the metal chassis, with disk and! or SCSI
drive(s) attached, and fasten it to the bezel with the
five Torx screws (Figure 49, #1).

(

FIGURE 49

6. Replace the

analo~

board.

7. Replace the main logic board.
8. Replace the video board.
9. Replace the cover.

2.48 / Take-Apart

rev. Jun 91

Macintosh SE and SEl30

• Apple Technical Procedures

)

Macintosh SE and Macintosh SEl30
Section 3 - Adjustments
o CONTENTS
3.2
3.2
3.2
3.3
3.3
3.4
3.4
3.4
3.5

Yoke Adjustments
Introduction
Materials Required
Tilt Adjustment
Centering Ring Adjustment
Video Adjustments
Introduction
Materials Required
Adjustment Procedures

)

)
Macintosh 8E and 8E/30

rev. Jan 89

Adjustments / 3.1

o YOKE ADJUSTMENTS
Introduction

(

In infrequent cases, you may need to adjust the yoke of
the Macintosh SE or Macintosh SE/30 after you replace
the CRT. To see if the yoke needs adjusting, turn the
power on and look at the CRT screen. If the picture is
tilted, correct it using the tilt adjustment. If the picture
is off center, use the centering rings adjustment.
Yoke adjustments are made while standing behind the
Macintosh SE or Macintosh SE/30, so you must position
a mirror so that you can see the screen. Because of the
high voltage danger, do not try to make live
adjustments by facing the screen and reaching around
the computer; you can't see what your hands are going
totoueIL

Materials Required

Small Phillips screwdriver
Safety goggles
CRT discharge tool
Soft cloth or foam pad
Mirror
Exacto knife

(

FIGURE 1
WARNING: Read the safety precautions in Section 1,
Basics, before performing adjustments. Failure to follow
the safety rules could result in serious injury.

3.2 / Adjustments

rev. Jan 89

Macintosh SE and SE/30

Tilt Adjustment

)

Put on safety goggles and remove all metal jewelry.
If you are wearing a grounding wriststrap, remove it.

2. Remove the cover and discharge the CRT. (Refer to
Section 2, Take-Apart.)
3. Turn the computer with its back facing you, and
position the mirror with the CRT screen in the mirror.
4. Loosen the yoke clamp screw (Figure 1, #1) at the
top of the CRT neck two or three turns.
5. Connect the power cord and turn the power on.

6. Put one hand behind your back and with your other
hand grasp only the plastic spokes of the yoke
collar (Figure 1, #2). Rotate the yoke until the top
and bottom edges of the picture appear parallel with
the top and bottom edges of the bezel.
7. Turn the power off, unplug the computer, and
discharge the CRT again.
8. Hold the yoke collar in the position you just
determined in Step 6 and carefully tighten the yoke
clamp screw just enough so that the yoke cannot
slip. Do not overtighten.

)

9. Replace the cover.
10. Connect the power cord and turn the power on to
make sure the tilt adjustment is still correct.

Centering Ring
Adjustment

Put on safety goggles and remove all metal jewelry.
If you are wearing a grounding wriststrap, remove it.

2. Remove the cover and discharge the CRT. (Refer to
Section 2, Take-Apart.)
3. Turn the Macintosh SE or Macintosh SE/30 so that
its back is facing you, and position the mirror so
that the CRT screen is visible in the mirror.
4. Locate the two centering rings on the yoke assembly
(Figure 1, #3). The adjustment of these rings
determines whether the picture is centered or offset
to one side.
Note: If a bonding material is holding these rings in
place, break it using an exacto knife.

)
Macintosh SE and SEl30

Connect the power cord and turn the power on.

rev. Jan 89

Adjustments / 3.3

6. Center the picture by first holding the front centering
ring steady and moving the rear ring, then holding the
rear ring steady and moving the front ring.

(

7. When the picture is perfectly straight and centered,
turn the power off, remove the power cord, and
again discharge the CRT.
8. Replace the cover.
9. Plug in the power cord, turn the computer power
00, and view the screen to ensure that the centering
adjustment is still correct.

o VIDEO ADJUSTMENTS
Introduction

Video adjustments may be necessary whenever the CRT,
the analog board, the video board, or the power supply
is replaced.

Materials Required

Safety goggles
Plastic alignment tool (or "tweaker")
Mirror
Ruler

FIGURE 2

3.4 / Adjustments

rev. Jan 89

(

l
Macintosh SE and SE/30

)

Adjustment
Procedures

1. Put on safety goggles and remove all metal jewelry.
If you are wearing a grounding wriststrap, remove
it.
2. Remove the cover and discharge the CRT. (Refer to
Section 2, Take-Apart.)
3. Tum the computer with the side of the analog board
facing you, and position the mirror so that the CRT
screen is visible in the mirror.
4. Connect the power cord and turn the power on.

Brightness and Contrast

5. Turn the contrast control fully clockwise. (The
contrast control is on the front of the computer, on
the left side, under the Apple logo.)

6. Adjust the brightness control (Figure 2, #1) with
the alignment tool: turn it fully counterclockwise
so that white lines are visible on the screen. Then
turn it back in the opposite direction until the
white lines just disappear.
7. Turn the contrast control on the front panel slightly
counterclockwise. This is the ideal adjustment.

)
Size Adjustments

8. Use the plastic alignment tool to adjust the width
(Figure 2, #2) until the picture is approximately
7 inches wide.
9. Use the plastic alignment tool to adjust the height
(Figure 2, #3) until the picture is approximately
4.7 inches high.

Focus Adjustment

10. Turn the focus adjustment (Figure 2, #4) all the way
clockwise until it doesn't turn anymore. Now turn
it back in the opposite direction (counterclockwise)
one-eighth of a turn. This setting gives the best
overall sharpness at all points on the screen.

)
Macintosh SE and SEl30

rev. Jan 89

Adjustments / 3.5

(

• Apple Technical Procedures

)

Macintosh SE and Macintosh SEl30
Section 4 - Diagnostics
o CONTENTS
4.2
4.2
4.3
4.4
4.4
4.6
4.6
4.6
4.8
4.9
4.14
4.16
4.17
4.17
4.17
4.20
4.22
4.26
4.28
4.29
4.29
4.30

)

Macintosh SE and SE/30

Introduction to MacTest SE and MacTest SEl30
Program Similarities
Program Differences
Making Backup Disks
Copying MacTest SE and MacTest SEl30 Disks
Running MacTest SE and MacTest SEl30
Materials Required
Starting MacTest SE and MacTest SEl30
Installing the Loopbacks
Using the MacTest SE and SEl30 Menus
Running the Tests
Introduction to AppleCAT SE and AppleCAT SEl30
Running AppleCAT SE and AppleCAT SEl30
Materials Required
Setting Up Test Station and UUT
Establishing Communication
Using the AppleCAT Menus
Running the Tests
Repair Confirmation Codes
SCSI Loopback Jumper Procedure
To Determine If a Jumper Is Needed
To Install the Jumper

Aug 89

Diagnostics I 4.1

o INTRODUCTION TO MACTEST SE AND MACTEST SEt30

(

MacTest™ SE (version 3.0 or higher) is part of the
AppleCATTM SF.: diagnostic set that is used for testing
Macintosh SE systems. MacTest SEl3a (version 1.0 or
higher) is part of the AppleCAT SEl3a diagnostic set for
testing Macintosh SE/30 systems. Both MacTest SE and
Mac Test SEl30 may also be used as standalone

functional tests of their respective systems.

Program
Similarities

When used as standalone tests, MacTest SE and Mac Test
SEl30 perform pass/fail functional tests of the
Macintosh SE and Macintosh SE/30 systems,
respectively. MacTest SE and MacTest SEl3a are run
the same, but MacTest SEl3a tests Macintosh SE/30
components that do not exist in the Macintosh SE.
Initially, both MacTest SE and MacTest SEl3a allow you
to select the tests you want to run. As each test
progresses, messages on the screen indicate which area
is under test. As soon as a failure is detected, the test
stops and the screen indicates which module must be
replaced before the test can be run to completion. The
test then terminates and returns to the Finder (desktop).
Both MacTest SE and MacTest SEl3a also provide test
patterns for use in adjusting the CRT. Neither MacTest
SE nor MacTest SE/30 tests an internal SCSI hard disk.
To test the hard disk, use the Macintosh Hard Disk
Drive Diagnostic disk (see Section 3, Diagnostics, in
the SCSI Hard Disk Drives Technical Procedures).

4.2 / Diagnostics

Aug 89

Macintosh SE and SE/30

(

)

Program
Differences

Because of configuration differences between the
Macintosh SE and Macintosh SE/30 systems (see Basics),
Mac Test SE and Mac Test SEl30 test different
components.

Components Tested
by MacTest SE

MacTest SE tests the following Macintosh SE components:

•

•
•
•
•

Macintosh SE main logic board, including:
RAM
VIA
SCC
Clock
Sound chip
Internal and external disk drives
Keyboard and mouse
SCSI bus
Apple PC 5.25 Drive and Macintosh SE-Bus PC Card

The internal 96-pin Euro-DIN expansion bus connector
on the Macintosh SE logic board cannot be tested unless
an expansion card is connected to the expansion bus.
When a Macintosh SE-Bus PC Card and an Apple PC 5.25
Drive are installed, MacTest SE can test the card, drive,
and expansion bus at the same time.

)
Components Tested
by MacTest SEI30

MacTest SEl30 tests the following Macintosh SE/30

components:

• Macintosh SE/30 main logic board, including:

•
•
•
•

RAM
VIA
SCC
PMMU
FPU
Clock
Sound chip
Internal and external disk drives
Keyboard and mouse
SCSI bus
Video RAM

)
Macintosh SE and SE/30

Aug 89

Diagnostics I 4.3

o MAKING BACKUP DISKS

(

Make a backup of the original MacTest SE or MacTest
SE/30 diagnostic disk before you begin! When testing a
defective Macintosh SE or Macintosh SE/30, it is
possible to damage or erase a section of the Mac Test
disk.

You can make backup copies on any Macintosh,
regardless of which MacTest program you are copying.
For example, you can copy the MacTest SE disk using a
Macintosh Plus or a Macintosh II. The copy does not
have to be made on the Macintosh SE.
Copying
MacTest SE and
MacTest 5E130 Disks

Use Finder to make a backup copy of the MacTest SE
or MacTest SE/30 diagnostic disk. When copying the
MacTest SE or MacTest SEl30 disk, be sure to copy the
entire disk and not just the MacTest program. The
MacTest SE and MacTest SEl30 disks contain specific
versions of the System and Finder, and are not
guaranteed to run with other versions. Also, be sure to
copy MacTest SE and MacTest SE/30 to 800K disks only.

Using Your
Backup
Disk

Take the following precautions when using your
MacTest SE or MacTest SEl30 disk copy:

•

Do not write-protect your working copy of the
MacTest SE or MacTest SE/30 disk. The program

will not run correctly if you do.
•

4.4 I Diagnostics

Do not replace the System or Finder provided on
the MacTest disk. The versions used on the disk
are Finder 6.1 and System 6.0.2. MacTest SE and
MacTest SEl30 are not guaranteed to work with
other versions of the System and Finder.

Aug 89

Macintosh SE and SE/30

(

•

Do not change the name of the diagnostic program on

the disk. During logic board testing, the machine
reboots, looks for, and restarts the diagnostic named
MacTest SE (or MacTest SEl30, if you are testing
that system). If the name has been changed, the
startup routine will not be able to locate it, and the
system will stay on the desktop.
Therefore, if the MacTest SE or MacTest SEl30
window does not reappear after a logic board test,
check the name of the diagnostic's icon on the
desktop. Correct it to MacTest SE (or MacTest
SEl30) , and then select Set Startup from the desktop
Special menu. When you are asked if you wish to
change the name of the startup application to
MacTest SE (or MacTest SEl30) , click OK. Then
double-click on the corrected MacTest SE or
MacTest SEl30 icon to return to the test program.

)

)
Macintosh SE and SE/30

Aug 89

Diagnostics I 4.5

o RUNNING MACTEST SE AND MACTEST SE/30
Materials Required

MacTest SE or MacTest SEl30 diagnostic disk (backup)

Mini-DIN-8-to-mini-DIN-8 serial port cable
SCSI loopback test card (modified with jumper-see
"SCSI Loopback Jumper Procedure")
Blank, 800K disk for drive test
Blank, 1.4 MB disk for high-density drive test

Starting
MacTest SE and
MacTest SE/30

You can use Mac Test SE or MacTest SEl30 to perform a
functional test of the entire Macintosh SE or Macintosh
SE/30 system (respectively), or you can use it to test a
single component in a known-good system. Follow the
start-up steps below for the testing you wish to perform.

Testing
Complete System
or Logic Board

If you are testing a complete Macintosh SE or
Macintosh SE/30 system, or if you intend to run the
logic tests, turn the power off and remove any card
installed in the expansion slot.

Install the loopback connectors as described under
"Installing the Loopbacks," later in this section.

3. Insert the appropriate MacTest disk into the
internal drive, and power on the system. Mac Test
will display the Start, or Status, window. From the
Status window, you can click Start to run the tests.

Testing
Single
Component

1. If you are testing a single component in a knowngood system, insert the appropriate MacTest disk
into the internal drive and switch on system power.
2.

MacTest SE and MacTest SEl30 will display a
window telling you to switch off system power and
connect the SCSI loopback cable. The SCSI loopback
cable must be connected only when you are running
the logic board tests. If you do not need to connect
the SCSI loopback cable, click OK to get to the
Status window.

3. From the Status window, you can use the MacTest
menus. Go to the Options menu and use the Test
Selections submenu to select the tests you want to
run. Then click Start. For more specific information
on the tests, see "Using the MacTest SE and SEl30
Menus" and "Running the Tests," later in this
section.

4.6 I Diagnostics

Aug 89

Macintosh SE and SE/30

(

)

Helpful Startup
Information

If you do not know whether the system you are
testing is good, remove any expansion cards and run
the logic, drive, and video RAM (Macintosh SE/30
only) tests. (See "Using the MacTest SE and SEl30
Menus" and "Running the Tests," later in this
section.) Complete any needed repairs before you
continue.

2. If you removed a non-Apple expansion card from the
customer's system and the system tests OK, switch
off system power and replace the card. Then run the
logic, drive, and video RAM (Macintosh SE/30 only)
tests again to be sure the card is not interfering
with the system operation.
3.

If you want to test an Apple PC Card or an Apple PC
5.25 Drive (Macintosh SE only), run the Apple PC 5.25
Drive test as described in Section 3, Diagnostics, of
the Apple PC 5.25 Drive Technical Procedures.

4. If you encounter any of these problems, try the
solution that follows each problem:
•

A known-good MacTest SE or MacTest SE/30

disk will not boot: Refer to Section 5,
Troubleshooting.

)
•

The Configuration window indicates that an
attached disk drive is not installed: Check the
disk drive cables.

•

The Configuration window indicates that the
wrong amount of RAM is installed: Check SIMM
placements in the SIMM banks. For a Macintosh
SE, also check the position of resistors/jumpers
on the logic board. Refer to Section 6,
Additional Procedures.

•

The Configuration window indicates that an
upper internal drive is a lower internal drive
(or vice versa): Check the installation of the
internal drive cables.

•

A known-good MacTest SE or MacTest SE/30

disk will not boot: Refer to Section 5,
Troubleshooting.

)
Macintosh SE and SE/30

Aug 89

Diagnostics I 4.7

Installing the

Loop backs

Before beginning Mactest SE or Mac Test SF/30, and
with the power off, connect the serial loop back cable,
the SCSI loop back card, the keyboard and mouse, and
the external drive (optional).

(

CAUTION: Always power off the system when you
connect or disconnect the SCSI loopback card.

The SCSI loopback card (Figure 1, #1) must be
connected to the SCSI port (Figure 1, #2) on the back
of the system. (No other connections between the card
and the Macintosh SE or Macintosh SE/30 are
necessary.) To protect the SCSI circuitry, you must
have the power off when you connect the SCSI card.
Note: When the SCSI loopback card is connected,
the internal SCSI hard disk will not be able to
respond, nor will it be recognized by the system.
The loopback cable (Figure 1, #3) with the mini DIN-8
connectors must be installed between the modem and
printer ports (Figure 1, #4) on the rear of the machine.

(

FIGURE 1

4.8/ Diagnostics

Aug 89

Macintosh SE and SE/30

)

Using the
MacTest SE and
SE/30 Menus

Before you start MacTest SE or MacTest SEl30, you
may use the MacTest menus to select the tests that
you want to run or to select other features of the
diagnostic. You cannot use the menus when the tests
are running.

Options Menu

The Options menu contains the Test Selections and
Configuration submenus.
1.

Test Selections: The Test Selections windows
displayed by MacTest SE (Figure 2) and Mac Test
SE/30 (Figure 3) differ slightly, but the process of
selecting tests is the same for both programs.

Test Selections

181 Logic

Board

@ Short

Disk Driues:

D I.m.ll(~r [Jrhl(~

Long

o Keyboard

D Upper Driue

DMouse

o Sound
o Uideo Monitor Rdjustments
o HI)ph~:~~ 1>[ ~;'2~' Orim~ unit [ (~rd

)

o Loop on selected tests

)) ( Cancel)

FIGURE 2

Test Selections
~

Logic Board

@ Short

Long

Disk Driues:
~ Intern61

[HtN1U11

o Keyboard
DMouse
D Uideo Monitor RdJustments

o Uideo Ram Test
o Loop on selected tests

D (Cancel)

FIGURE 3

Macintosh SE and SE/30

Aug 89

Diagnostics I 4.9

Test Selections allows you to select the tests you wish to
run. To select a test, click in the box next to the name
of the item to be tested (an X appears). To deselect the
test, click again in the box (the X disappears). When you
have selected all the tests you wish, click OK to return
to the Mac Test Status window.

(

a) Logic: This test will verify the correct
functioning of the following circuitry on the
logic board:
•

VIA (Versatile Interface Adaptor)
(Serial Communications Chip)
Clock
SCSI bus
RAM
FPU (Floating-Point Unit) (Macintosh SE/30
only)
PMMU (Paged Memory Management Unit)
(Macintosh SE/30 only)

• sec
•
•
•
•
•

You may select a short or long logic test. The
running time of the test will vary depending on
how much memory is installed. At the beginning
of the RAM test, 1l1acTest SE and MacTest SEl30
will indicate the maximum running time of the
test.
b) Keyboard: This selection activates the keyboard
self-tests that verify the functioning of the
keyboard.
c) Mouse: This selection activates the mouse selftests that verify the functioning of the mouse.
d) Disk Drives: You may test any or all of the
drives (except internal or external hard disks):
•
•
•

Lower
Upper (Macintosh SE only)
External

Note: The diagnostic will not test an external
disk drive that is connected through a non-SCSI
Hard Disk 20.
e) Video RAM (Macintosh SE/30 only): This
selection tests the 64K of video RAM. Be aware
that video patterns will flash across your screen
during this test.
4.10 I Diagnostics

Aug 89

Macintosh SE and SE/30

(

)

Video Monitor Adjustments: This selection
displays test patterns that are used to adjust the
video picture on the monitor. After making any
necessary video adjustments, click the mouse or
hit any key to continue testing or to return to
the MacTest SE or MacTest SEl30 window.

g) Sound: This option provides two tests that
verify the proper functioning of the Macintosh
SE and Macintosh SE/30 sound chip:

•

8-Level Volume Test: produces 8 tones of
increasing volume.

•

C Scale: produces a C-major scale.

h) Apple PC 5.25 Drive (Macintosh SE only): This
test verifies the correct functioning of the drive,
the Apple PC Card, and the expansion port on
the main logic board. To set up for this test,
follow the instructions in Section 3, Diagnostics,
of the Apple PC 5.25 Drive Technical Procedures.

Note: The Apple PC 5.25 Drive test cannot
always determine which module caused a test to
fail. If the test reports that the drive and/or
card is bad, replace one module at a time as
described in Section 5, Troubleshooting, of the
Apple PC 5.25 Drive Technical Procedures.

)

i) Loop on selected tests: This selection provides a
continuous running (in sequence) of all selected
tests. To stop the looping, click Stop between
tests (that is, when the screen displays an arrow
rather than a wristwatch).
Here are a few simple guidelines to keep in
mind when preparing to perform loop tests:
•

You cannot loop on Video Monitor
Adjustments.

•

You cannot loop on both the Logic Board and
Disk Drives tests at the same time.

•

When loop-testing a disk drive with more
than one possible data format (FDHD), you
can select only one format to loop on.

)
Macintosh SE and SE/30

Aug 89

Diagnostics I 4.11

2. Configuration: When Configuration is selected,
MacTest SE displays the window shown in Figure 4,
and MacTest SEl30 displays the window shown in
Figure 5.

(

Macintosh SE Configuration
Memory Size:

1 MB

ROM Uersion :

0300

Disk Controller:

SWIM

Lower Drlue:

Not Connected

Upper Driue:

1.4MB

EHternal Driue:

Not Connected

AppleS PC Card:

Not Installed

(~OK

FIGURE 4

Mocintosh SE/30 Configurotion

Memory Size:

2 MB

ROM Uersion :

Reu 1.3

I nternol Driue:

1.4 MB

EHternol Driue:

Not Connected

(

FIGURE 5
The two Configuration windows display slightly different
information. The MacTest SE window indicates the
amount of memory in the Macintosh SE, the version
number of its ROMs, the type of disk controller chip
installed, its current disk drive configuration, and
whether or not an Apple PC card is installed. The
MacTest SEl3D window displays the amount of memory in
the Macintosh SE/30, the version number of its ROMs,
and its current disk drive configuration.

4.12 I Diagnostics

Aug 89

Macintosh SE and SE/30

File Menu

)

The File menu displays the following items. (Open and
Close are dimmed.)

• Open..
• Close
•

•
•

Save Test Selections
Stop
Quit

[Command-OJ
(Dimmed unless a desk
accessory is open)
[Command-S1
[Command-.l
[Command-Q1

Save Test Selections: Allows you to customize your
MacTest disk by saving your selection of tests for
the next time you use Mac Test SE or Mac Test SEl3D.

Stop: Ends the diagnostic and returns to the
MacTest Status window.

3. Quit: Returns you to the desktop.

Apple Menu

The Apple (ti) menu contains the following items.
(Chooser and Find File are shown, but they are inactive.)
1.

About MacTesFM SE or About MacTestTM SE/30.
When selected, a dialog box displays the diagnostic
name, version number, date of release, serial
number, and a copy-protect statement.

Control Panel This option allows you to set
preferences for speaker volume, monitor status,
mouse tracking, or desktop pattern.

)

3. Key Caps. When selected, Key Caps displays a
window with a keyboard. Press each key on the
keyboard and verify that the display block for the
key is highlighted. If the key is not highlighted,
the keyswitch is bad and should be replaced. If
numerous keys are not highlighted, exchange the
keyboard.

)
Macintosh SE and SE/30

Aug 89

Diagnostics I 4.13

Running
the Tests

After using Test Selections to select the tests you wish
to run, you are ready to start MacTest SE or
MacTest SEl30. Click Start in the Status window.
Please note the following:
•

The Status line at the bottom of the window will
keep you informed of the tests being performed and
the test results.

•

While running, all tests display a wristwatch. There
is no other moving or flashing indicator that tells
you the test is in progress.

•

When testing the logic board with a SCSI loopback
card that is missing or improperly installed, testing
will begin but the SCSI port test will fail. You
must switch off system power, disconnect all
external SCSI drives, and connect the SCSI loopback
card before continuing the test.

•

When testing the logic board, if the serial loopback
cable is missing or improperly installed, the testing
will begin but the serial ports test will fail. You
will be instructed to connect a serial loopback cable
and then to click OK to retry the failed test. (You
can connect the serial loopback cable without
shutting down the system.)

•

4.14 / Diagnostics

The RAM test causes several seconds of startling
graphics to be displayed on the screen before the
program reboots to the MacTest Status window.

Aug 89

Macintosh SE and SE/30

(

•

)

When testing the FDHD disk drive, you will be
prompted to insert and remove blank 800K and highdensity 0.4 MB) disks. Perform the disk swaps as
directed on the screen, and then click OK.

Note: It is important to insert the requested low- or
high-density disk. If the wrong disk is inserted,
MacTest SE and MacTest SEl30 will indicate that the
disk drive is malfunctioning when it may not be.
CAUTION: Do not press the reset or interrupt switch while
the RAM test is running. Pushing reset causes the RAM
test to fail, and pressing interrupt may damage the
Mac Test disk.

•

You may halt the testing by clicking Stop or Pause
anytime between tests (when the cursor is an arrow,
rather than the wristwatch).
Choose Stop to halt the testing and to return to
the Status window. Choose Start when you wish
to begin the testing sequence again.
Choose Pause if you wish to discontinue testing
temporarily. Choose Continue to resume the
tests from the point of interruption.

)

Note: Pause, the default option, can also be selected
during testing by pressing the or
keys. The program will act upon the Pause command
when it is between tests.
Replace any module that the test indicates is faulty (see
Section 2, Take-Apart). Before replacing the module,
use AppleCAT SE or AppleCAT SEl30 (whichever is
appropriate) or refer to Section 5, Troubleshooting, to
verify the diagnosis. If the system is still not operating
properly, turn to Section 5, Troubleshooting, for more
information.
If all tests pass, the Macintosh SE or Macintosh SE/30
will return to the Status window. The message All
selected tests have passed will be displayed on the
Status line.

)
Macintosh SE and SE/30

Aug 89

Diagnostics I 4.15

o INTRODUCTION TO APPLECAT SE AND APPLECAT SEl30

(

AppleCAT™ SE and AppieCA pM SEl30 are diagnostic
tools that use a known-good Macintosh to diagnose
module failures in a defective Macintosh SE or
Macintosh SE/30, respectively. The machine doing the
testing, or test station, is connected to the machine
being tested, or Unit Under Test (UUT) , through their
communication ports. The test station, when booted
with the AppleCAT SE or AppleCAT SE/30 diagnostic
program, performs the following functions:

•
•
•
•
•
•
•
•
•

Establishes communications with the UUT
Calls tests in the UUT ROM
Downloads tests to the faulty machine
Calls tests from the MacTest SE or MacTest SEl30
disk in the UUT disk drive
Displays test results on the test station screen
Identifies the failing module
Prompts the technician for information
Recommends a repair procedure
Issues a repair confirmation code (RCC)

Using AppleCAT SE or AppleCAT SEl30, the machine
being tested does not have to be fully operational. By
using an independent, working computer to do the
diagnosis, the AppleCAT diagnostic programs depend
very little on the unit under test (UUT) , and are more
reliable and thorough than traditional diagnostic
methods.
Standard windows guide the technician through each
stage of the diagnostic. When the UUT fails a test or
indicates a problem, an AppleCAT SE or AppleCAT
SEl30 window will ask for more information or
recommend a repair.
After each module replacement or adjustment, AppleCAT
SE and AppleCAT SEl30 rerun the failed test to verify
that the problem has been fixed. If the UUT
successfully completes this final test, the AppleCAT
programs issue a repair confirmation code (RCC).

4.16 / Diagnostics

rev. Aug 89

Macintosh SE and SE/30

(

)

o RUNNING APPLECAT SE AND APPLECAT SE/30
Materials Required

Known-good Macintosh test station
Programmer's switch for the UUT
Mini-DIN-8-to-mini-DIN-8 serial port cable (590-0552)
SCSI loopback card
Mini DIN-8 serial loopback plug
Torx screwdriver
Macintosh take-apart tool
CRT discharge tool
#0 Phillips screwdriver
#1 Phillips screwdriver

Macintosh SE
Materials Required

Macintosh SE (unit under test or UUf)
AppieCA pM SE diagnostic disk
MacTest™ SE disk (write-protected)
Blank) 800K disk
Blank) 1.4 megabyte disk

Macintosh SEI30
Materials Required

Macintosh SE/30 (unit under test or UUT)
AppleCAT SEl30 diagnostic disk
MacTest™ SEl30 disk (write-protected)
Blank) 800K disk
Blank) 1.4 megabyte disk

Setting Up
Test Station
and UUT

1. Connect the test station to a wall socket with an
AC power cord.

)

Place the UUT next to the test station.

Connect the UUf to a wall socket with an AC power
cord.

)
Macintosh SE and SE/30

rev. Aug 89

Diagnostics I 4.17

CAUTION: Always power off the system when you
connect or disconnect the SCSI loopback card.

Connect the SCSI loopback card to the SCSI port
(Figure 6, #1) on the UUT.

5. Connect the serial loopback plug to the printer port
(Figure 6, #2) on the UUT.

(

FIGURE 6

6. Connect one end of the serial port cable to the
modem port on the UUT; connect the other end to
the modem port on the test station (Figure 7).

FIGURE 7
4.18 I Diagnostics

rev. Sep 89

Macintosh SE and SE/30

)

Connect a keyboard or mouse to the OUT.

8. Verify that the programmer's switch (Figure 8) is
installed. With the front of the UUT facing you,
insert the two short tabs of the programmer's switch
into the 6th and 7th open slots from the back, along
the left side of the UUT. Push the switch until it
snaps into place or you are certain it is secure.
The programmer's switch has two parts. The front
part of the switch is a reset switch. Pressing the
reset switch is just like turning the power switch
off and back on. The back part of the switch is an
interrupt switch. Pressing the interrupt switch
places the UUT in interrupt mode.

)

FIGURE 8
Macintosh SE and SE/30

rev. Sep 89

Diagnostics I 4.19

Establishing
Communication

Insert the AppleCAT SE (if testing a Macintosh SE)
or AppleCAT SEl30 (if testing a Macintosh SE/30)
disk in the test station, and switch on system power.

Open the disk icon and then the AppleCAT icon.
The Start, or Status, window will appear on the test
station screen.

3. Be sure that all disks are ejected from the UUT.
4. Switch on system power at the UUT.
For a Macintosh SE: If the video is normal, the
Macintosh SE (UUT) will briefly display a blank gray
screen with an arrow. When this screen appears,
press the interrupt switch (Figure 9) to enter
interrupt mode. (You may have to press the
interrupt switch 3 to 5 times!) When in interrupt
mode, the UUT can respond to information received
over the communication port. You will know you are
in interrupt mode when the screen displays the' "sad
Macintosh" icon.
If the UUT screen is completely dark, or if bars or
stripes are displayed, there may be a problem with
the video. If the above occurs, wait about 4 seconds
per megabyte of installed memory, and then press
the interrupt switch to enter interrupt mode.

FIGURE 9

4.20 I Diagnostics

rev. Aug 89

Macintosh SE and SE/30

(

For a Macintosh SE/30: If you hear only the boot tone
(a single chord), you are not in interrupt mode. To
get into interrupt mode, wait until an arrow appears
in the upper-left corner of the UUT (Macintosh SE/30)
screen (about 4 seconds per megabyte of installed
memory), and then press the interrupt switch (Figure
9). When in interrupt mode (test mode), the UUT can
respond to information received over the
communication port.

)

IMPORTANT: If you hear any additional chords (chimes)
after the single boot tone, you are already in interrupt/test
mode. Do not hit the interrupt switch. The Macintosh
8EI30 will automatically go into interrupt mode if an error
is detected at power on.

If the UUT has video problems, the arrow may not be
visible in the upper-left corner of the screen. If
there is no arrow, wait about 4 seconds per megabyte
of installed memory, and then press the interrupt
switch.
Note: If a MacTest SE or Mac Test SEl30 disk was
left in the UUT disk drive during power on, the
MacTest disk may boot before you can press the
interrupt switch on the UUT. If this happens, eject
the MacTest disk, power off the UUT, and start over
at step 4.

)

)
Macintosh SE and SE/30

rev. Aug 89

Diagnostics I 4.21

Using the
AppleCAT
Menus

Before you start AppleCAT SE or AppleCAT SEl30,
you may use the AppleCAT menus to select the tests you
want to run or to select other features of the diagnostic.

(

Note: You must make your test selections from the
AppieCA T menus before starting AppleCAT SE or
AppleCAT SEl30. Changes to the test selections cannot
be made while the AppieCA T test is running. If you do
not use the Test Selections menu, the default test
selection will include the following tests:
•
•
•

Logic Board
Internal Disk Drive (Macintosh SE/30) or
Lower Floppy Drive (Macintosh SE)

IMPORTANT: Selecting specific tests shortens the
AppleCA T SE/30 test, but selected tests cannot find all
faulty modules. Only the default test selections will ensure
a complete system check.

Options Menu

The Options menu contains the Test Selections submenu.
Test Selections allows you to select and run certain
tests individually. To select a test, click in the box
next to the name of the item to be tested. The box will
display an X. To deselect the test, click again in the
box to remove the X. When you have selected all the
tests you wish, click OK. You will be returned to the
Status window.
Note: Test Selections will remain unchanged until you
change them or you reboot the AppleCAT SE or
AppleCAT SEl30 program.

Test Selections

t8l Logic Boord

Disk Driues:

D Uideo Troubleshooting

[81 Lower Floppy Driue

D Upper Floppy
((

Driue

)) (cancel)

FIGURE 10

4.22 I Diagnostics

rev. Aug 89

Macintosh SE and SE/30

(

)
Test Selections

1811 nternal Floppy Driue

~ Logic Board

o Uideo Troubleshooting
([

))

(cancel)

FIGURE 11
The Test Selections su bmenus for AppleCAT SE
(Figure 10) and AppleCAT SEl30 (Figure 11) differ
slightly, but each program includes Logic Board, Video
Troubleshooting, and Disk Drive tests.
1. Logic Board: This test verifies the correct
functioning of the following circuitry on the
Macintosh SE and Macintosh SE/30 logic boards:

)

•
•
•
•
•
•
•
•
•
•
•
•

ROM
Memory Size (RAM)
CPU Data Bus and Address Bus
Parameter RAM
VIA (Versatile Interface Adaptor)
Internal Clock
FPU (Floating Point Unit) (Macintosh S£/30 only)
Sound Chip (Macintosh S£/30 only)
SCC (Serial Communications Controller)
SCSI Bus
Apple Desktop Bus
Video RAM (Macintosh S£/30 only)

Note: Although both AppleCAT programs test the
SCSI circuitry on the logic board, they do not test
the internal SCSI hard disk. To test the hard disk,
use the Macintosh Hard Disk Drive Diagnostic disk
(see Section 3, Diagnostics, in the SCSI Hard Disk
Drives Technical Procedures).

)
Macintosh SE and SE/30

rev. Aug 89

Diagnostics I 4.23

2. Video Troubleshooting: This test checks the video
RAM. Be aware that video test patterns are flashed
on the screen during the test-the patterns do not
mean your monitor is failing.

(

3. Internal Floppy Drives: This test will verify the
proper functioning of the SWIM/IWM disk
controller chip, and the upper (Macintosh SE only)
and lower floppy disk drives.

Note: Both the Macintosh SE and Macintosh SE/30
may have high-density disk drives installed. Testing
a 1.4 MB internal drive requires swapping blank
disks in the uur. Refer to "Running the Tests," step
5, for more information.

File Menu

The File menu displays the following items. All are
dimmed except Stop (during testing) and Quit.
[Command-OJ
(Dimmed unless a desk
accessory is open)
(Option not available)
[Command-J
[Command-Q]

•

Open.••

•

•
•
•

Save Test Selections
Stop
Quit

Stop: Select Stop to end the diagnostic and return
to the Status window.

2. Quit: Select Quit to exit the program and return to
the desktop.

4.24 I Diagnostics

rev. Aug 89

Macintosh SE and SE/30

(

)

Apple Menu

Both the AppieCA T SE and AppleCAT SF/30 Apple ('*)
menus contain the following desk accessories:
1. About Diagnostic: When selected, a dialog box

displays the diagnostic name, version number, date
of release, serial number, and a copy-protect
statement.
2. Control Panel: With this option you can set
preferences for items such as speaker volume,
mouse tracking, whether or not AppleTalk is
connected, and the desktop pattern.
The following standard desk accessories are available
either from the AppleCAT SE or from the AppleCAT
SF/30 Apple (ti) menu:

•
•
•
•

Help

)

Chooser (AppleCAT SF/30 only)
Find File (AppleCAT SE only)
Scrapbook (AppleCAT SE only)
Alarm clock and Calculator (AppleCAT SE only)

The AppieCA T SEl30 Help menu includes a Memory
Configuration option. Memory Configuration shows all
possible RAM SIMM configurations for your Macintosh
SE/30.
The AppleCAT SEHelp menu includes SIMM Jumper
Setup and SIMM Resistor Setup options for the type of
logic board in your Macintosh SE (see "Macintosh SE
SIMM Upgrades" in Section 6, Additional Procedures).
These selections show all possible RAM SIMM and
corresponding jumper or resistor configurations for the
Macintosh SE.

)
Macintosh SE and SE/30

rev. Aug 89

Diagnostics I 4.25

Running
the Tests

After selecting the tests you wish to run using
Test Selections, you are ready to start AppleCAT SE or
AppleCAT SEl30. Click Start in the AppleCAT Status
window. Please note the following:

(

1. The Status line at the bottom of the Status window

will keep you informed of the tests being
performed and their results.

Note: If the message Could not establish
communication appears on the Status line, you may
have inserted the MacTest disk in the uur disk
drive before powering on. If this message appears,
follow the instructions given in the AppleCAT Status
window.
2. AppleCAT SE and AppleCAT SEl30 will interact with
you throughout each stage of the testing. When the
UUT fails a test or indicates a problem, the program
will prompt you for more information or recommend
a repair.

Note: When performing disk drive tests on a
Macintosh SE or Macintosh SE/30 with a 1.4 MB
drive, you will be required to perform setup steps
(see step 5).
3. The program will ask you for information that it
cannot obtain electronically. The screen will
display a choice of answers. Select the most
appropriate answer in each situation. After
selecting a response, click OK to continue.
CAUTION: Do not click the OK button until you've
completed every instruction given on the screen. Failure
to complete the instructions may misdirect the diagnostic.

4.26 I Diagnostics

rev. Aug 89

Macintosh SE and SE/30

(

4. If the UUT is turned off to replace or reinstall a
module:

)

a) Verify that all cables and test fixtures are
reattached before powering on.
b) Eject all disks from the UUT, and then switch on
system power.
c) Macintosh SE: Wait 9 to 22 seconds, depending
upon how much memory is installed, and press
the interrupt switch to enter interrupt mode.
Macintosh SE/30: If you do not hear the test
mode chimes, wait until an arrow appears
onscreen (about 4 seconds per megabyte of
RAM), and then press the interrupt switch to get
into the test mode.
5.

)

AppleCAT SE and AppleCAT SEl30 will also ask you
to perform setup steps. When the Setup Required
window appears, insert the requested disk. After
inserting the disk, click Done to continue the test.
AppleCAT will request the foHowing disks:
•

BOOK disk (blank and write-enabled)

•

High-density disk (blank and write-enabled; for
FDHD drive testing only)
Write-protected, Mac Test SEl30 disk

•

6. You may haIt the testing by clicking Stop or Pause
anytime during the tests:
a) Choose Stop to halt the testing and to return to
the AppleCAT Status window. Choose Start when
you wish to begin the testing sequence again
from the beginning.
b) Choose Pause if you wish to discontinue testing
temporarily. Choose Continue to resume testing
from the point of interruption.
IMPORTANT: Please read all messages and instructions
carefully. Do only what the AppleCA T program specifically
instructs you to do.

)
Macintosh SE and SE/30

rev. Aug 89

Diagnostics I 4.27

Repair
Confirmation
Codes

If AppleCAT SE and AppleCAT SEl30 find no problems,
they return to the Status window. The Status line
will display the message All selected tests pass.

(

If AppleCAT SE or AppleCAT SEl30 detects an
unidentifiable error in the Macintosh SE or Macintosh
SE/30, it will issue a repair confirmation code CRCC).
The RCC is an eight-digit information record that
contains the diagnostic name, the diagnostic version
number, the replaced module name, and the repair
sequence the program followed. The RCC should be
entered on the SRO form that accompanies the returned
module.

AppleGAT
RGGs

If AppleCAT SE or AppleCAT SEl30 is unable to identify
the problem with the UUT, AppleCAT will issue an RCC
beginning with one of the following four-digit prefixes:
•
•

Helpful
Suggestions

4.28 / Diagnostics

19ZZ-xxxx . . . . . . . for the Macintosh SE
4GZZ-xxxx . . . . . . . for the Macintosh SE/30

If you receive an RCC with one of the prefixes shown
above, refer to Section 5, Troubleshooting, for
information that can help you isolate the problem. Also
keep in mind that AppleCAT SE and AppleCAT SEl30 are
unable to identify a system failure if any of the
following is true:
•

The bad module is failing intermittently.

•

The system configuration changes during the test
(memory is removed or added, or system power is
removed).

•

Selected modules are tested; only the default tests
perform a complete system check.

•

The replacement module itself is bad.

•

You provide inaccurate input to AppieCA T, or set up
the test station incorrectly.

rev. Aug 89

Macintosh SE and SE/30

(

o SCSI LOOPBACK JUMPER PROCEDURE
To Determine
HaJumper
Is Needed

To be used with Mac Test SE and AppleCAT SE, and with
MacTest SEl30 and AppleCAT SEl30, the SCSI loopback
card must be jumpered between Pin 25 of J1and Pin 14
of RP1. On new SCSI loopback cards, the jumper has
been etched into the printed circuit. Only cards with
the old PCB artwork need the jumper procedure.

Note: This modification does not interfere with the
card's use on other Macintosh or Apple II family
systems, except that to work on Apple II systems, the
card must be connected to a notched mouse cable. (For
further information on the notched cable, refer to Hard
Disk 20SC Technical Procedures, Section 5, "SCSI
Interface Card. It)
To Identify

a New Card

)

To determine if you have a new card, which will not
need to be jumpered, look at the back of the card. If
the jumper is included in the artwork, there will be an
A instead of double zeros (00) at the end of the part
number, which is located under the words "APPLE
COMPUTER" (Figure 12, #1). These new cards do not
have to be jumpered.

FIGURE 12

)
Macintosh SE and SE/30

rev. Aug 89

Diagnostics / 4.29

External
Jumpers on
Old Cards

Some cards with the 00 part number and the old
artwork were modified with an external jumper
during the manufacturing process. Therefore, if your
card has a 00 part number, check to see if it has an
external jumper from Pin 25 of J1 to Pin 14 of RP1
(Figure 13, #1). If the card has no external jumper, you
must install one yourself.

(

(
FIGURE 13

Summary

To summarize:
If # on back

Do this:

ends with:

To Install
the Jumper

4.30 I Diagnostics

Nothing
Oumper is present in artwork.)

Check to see if external jumper
is present. If not, install jumper.

If you find that the card must be jumpered, solder a
wire connection between Pin 25 of J1 and Pin 14 of
RP1, as shown in Figure 13. (The pins are not
numbered on the board. In the orientation shown in
Figure 13, Pin 25 is the pin closest to the upper-left
corner of the card, and Pin 14 is in the middle line of
pins, closest to the left edge of the card.)

rev. Aug 89

Macintosh SE and SE/30

Ii Apple Technical Procedures

)

Macintosh SE and Macintosh SEl30
Section 5 - Troubleshooting
o CONTENTS
5.3
5.3
5.3
5.3
5.4
5.4
5.6
5.7
5.8
5.9
5.10
5.12
5.12
5.12
5.12

)

)
Macintosh SE and SE/30

rev. Mar 89

Troubleshooting I 5.1

(

)

o INTRODUCTION
General
Infonnation

There are three diagnostic tests that you may use to
troubleshoot a Macintosh SE or Macintosh SE/30 system:
•
•
•

AppleCA'PM SE or AppleCA'PM SE/30
MacTestTM SE or MacTest™ S£/30
Macintosh Hard Disk Drive Diagnostic

(version 4.0 or higher)
Use this troubleshooting section if the diagnostics are
unable to detect a failure. Read "Symptom Chart,"
"Isolating a Faulty Macintosh SE SIMM," and "Battery
Verification" before you begin troubleshooting; you will
need this information to troubleshoot the Macintosh SE
and Macintosh SE/30 effectively. After repairing the
system, run the diagnostics to verify system operation.

How to Use
the Symptom
Chart

Find the symptom that most nearly describes the
problem, then perform the corrective actiops in the
order listed. If a corrective action does not fix the
problem, go to the next action. If you replace a module
and find that the problem remains, reinstall the original
module before you go on to the next action.

Things to
Remember

Read all the safety precautions before removing or
installing any modules. (See Section 1, Basics.)

Follow all ESD precautions when troubleshooting.
(See You Oughta Know for more information.)

Perform the CRT discharge procedure before
removing or installing any modules. (See Section 2,
Take-Apart.)

Use known-good software. Bad software can
produce symptoms that appear to be hardware
problems.

)

5. If a non-Apple expansion card is installed, or if an
Apple expansion card is installed and the Macintosh
SE or Macintosh SE/30 will not start up, remove the
expansion card before troubleshooting. When the
Macintosh SE or Macintosh SE/30 operates correctly
without the expansion card, replace the card and
test again.

Macintosh SE and SE/30

rev. Mar 89

Troubleshooting I 5.3

o SYMPTOM CHART

(

Video Problems

Solutions

•

1. Turn brightness control clockwise.
2. Check video cable connections.

•

Screen is dark;
audio and drive
operate

Screen is bright and
audio is present,
but no video
information is visible

3.
4.
5.
6.

Replace
Replace
Replace
Replace

analog board.
video board.
main logic board.
CRT.

Replace analog board.
Replace video board.
3. Replace main logic board.
1.

•

Screen is completely
dark and fan is not
running

Replace power supply.
2. Replace analog board.

•

A single vertical
line is displayed

1. Replace analog board.
2. Replace video board.
3. Replace main logic board.
4. Replace CRT.

•

A single horizontal
line is displayed

1. Replace analog board.
2. Replace video board.
3. Replace main logic board.
4. Replace CRT.

•

Vertical bars
or stripes are
displayed

Replace main logic board.
2. Replace analog board.

•

Horizontal bars
or stripes are
displayed

1. Replace main logic board.
2. Replace analog board.

(

l
5.4 / Troubleshooting

rev. Jan 89

Macintosh SE and SE/30

)

Video Problems
(Continued)

Solutions

•

A white dot is
displayed in
center of screen

1. Verify that the yoke cable is connected.
2. Replace analog board.
3. Replace CRT.

•

Screen jitters at
top left and/or
lower right

Replace analog board.

)

)
Macintosh SE and SE/30

rev. Jan 89

Troubleshooting / 5.5

Peripheral Problems

Solutions

(
•

Cursor does not
move

1.
2.

•

Cursor moves but
clicking the mouse
button has no effect

1.
2.

Replace mouse.
Replace main logic board.

•

Cannot double-click
to open an application,
disk, or server

Remove any multiple system files on the hard
disk.
Clear parameter RAM. Hold down the

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.6
Linearized                      : No
Create Date                     : 2017:01:17 11:38:47-08:00
Creator                         : Adobe Acrobat 9.0
Modify Date                     : 2017:01:17 12:42:40-08:00
XMP Toolkit                     : Adobe XMP Core 4.2.1-c041 52.342996, 2008/05/07-21:37:19
Metadata Date                   : 2017:01:17 12:42:40-08:00
Creator Tool                    : Adobe Acrobat 9.0
Format                          : application/pdf
Document ID                     : uuid:f9883467-857d-c847-b3c5-8561a755942b
Instance ID                     : uuid:eba20e51-a2b0-b34f-9fe3-0123641ebc6a
Producer                        : Adobe Acrobat 9.0 Paper Capture Plug-in
Page Layout                     : SinglePage
Page Count                      : 395

EXIF Metadata provided by EXIF.tools

PN_072 0228_Apple_Service_Technical_Procedures_Macintosh_Family_Volume_One Mar_1992 PN 072 0228 Apple Service Technical Procedures Macintosh Family Volume One Mar 1992

PN_072-0228_Apple_Service_Technical_Procedures_Macintosh_Family_Volume_One-Mar_1992 PN_072-0228_Apple_Service_Technical_Procedures_Macintosh_Family_Volume_One-Mar_1992

Navigation menu

Versions of this User Manual:

Views

Navigation