95522_STC_2920_Illustrated_Parts_Catalog_Oct88 95522 STC 2920 Illustrated Parts Catalog Oct88

95522_STC_2920_Illustrated_Parts_Catalog_Oct88 95522_STC_2920_Illustrated_Parts_Catalog_Oct88

User Manual: 95522_STC_2920_Illustrated_Parts_Catalog_Oct88

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SEPARATOR SET PN 83464

THIS SEPARATOR SET CONTAINS 19
TABS TOTAL IN THE FOLLOWING
ORDER:
MAINTENANCE MANUAL
1. INTRODUCTION
2. OPERA T I ON
3. iNSTAllATiON
4. STORAGETEK INTERFACE
5. INDUSTRY INTERFACE
6. SCSI INTERFACE
7. VS INTERFACE
8. FUNCTIONAL DESCRIPTION
9. MAINTENANCE
10. REMOVAL/REPLACEMENT
11. DIAGNOSTICS
APPENDICES
IPC
PN COMPATIBILITY
MMLL
21/22/25 STD & 25 IND STO FCD
21/22 IND STO FeD
2925 SCSI FCD

"

[..I

Storage Technology Corporation

2920
Tape
Subsystem
!lIustrated Parts
Catalog
PN 95522

Information contained In this publication is subject to
change. In the event of changes, the publication will be
revised. Comments concerning the contents of this manual
should be directed to Tape/Disk Technical Publications at
the address below. A prepaid Reader's Comment Form is
provided at the back of the manual.
this publication was prepared by Storage Technology
Corporation, Tape/Disk Technical Publications, MO 97, 2270
South 88th Street, Louisville, Colorado 80028.

Warning: For the purpose of designing a system that
complies with FCC Rules and Regulations, Volume II, Part
15, Subpart J, this product is considered to be a
component within the total system configuration. It Is the
customer's responsibility to take such action as necessary
(shielded cabling i cabinet conSiderations, etc.) while
integrating this product Into his system so as to comply
with the above rules. Contact Storage Technology
Corporation for technical assistance in this matter.

Copyright

©

1984, 1986
by
Storage Technology Corporation
All Rights Reserved

ii

EC 49994
KIT PH 87783

95522

LIST OF EFFECTIVE PAGES
Manual PN 95522
Issue Date:
Reissue Date:
Change Date:
Incorporates EC:
Total

nu~ber

August 1983 EC 49288
February 1986 EC 49997
October 1988 Change 26
26499

of pages in

.....

Kit PN 87707
EC 26499 Kit PN 88536

document is 54,

th;c:
--.,

consisting of the

fo 110wi ng pages:

Cover
ii
iii thru i v
v

vi thru x
1

2

·3
4

5
6

7
8
9

10
i i

12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
95522

KIT PN

EC NO.

PAGE
o

87707
87783
88536
88125
87707
87707
83411
. 877.07
88375
88392
88011
88113
83215
88375
83411

EC 49997

EC
EC
EC
EC
EC
EC

EC

EC
EC
EC
EC
EC
EC
EC

49994
26499
23953A
49997
49997
23462
49·997
26258
26406
23490
26087
50524
26258
23462

88387
88536
88387
88387
88387
83102
88100
83487
87707
83383
87707
87707
87707
87707
87707
83229
83470
83470
83470
83470

EC 26393

EC 26499

EC 26393
EC 26393
EC 26393
EC 50503
EC 26055
EC 23727
EC 49997
EC 23442
EC 49997
EC 49997
EC 49997
EC 49997
EC 49997
EC 23149
EC 23654
EC 23654
EC 23654
EC 23654
EC 26499
PiN

REPLACE

88201

EC 26180

Kit

DISPOSITION

88536

REPLACE

;ii

LIST OF EFFECTIVE PAGES CONT
PAGE

EC NO.

32
33
34
35
36
37
38
39
40
41
42
Reader's Comment Form
Business Reply Mailer

EC
EC
EC
EC
EC
EC
EC
EC'
EC
EC
EC
EC
EC

iv

23953A
26251
26506
26506
26456
26422
23953A
26499
26499
26499
23953A
49997
49997

EC 26499
Kit PiN 88536

KIT PN
88125
88262.
88451 .
. 88451
88453
88443
88125
88536
88536
88536
88125
87707
87707

DISPOSITION

REPLACE
REPLACE
REPLACE

95522

TABLE OF CONTENTS
TITLE

PAGE

HOW TO USE. ILLUSTRATED PARTS CATALOG

vii

COVER GROUP.
·BASIC ASSEMBLY . . . ~ .
RETRACTOR ASSEMBLY.
FAN ASSEMBLY . . . .
BLOWER ASSEMBL Y. .' . . . . .
FILE HUB SUBASSEMBLY, MANUAL.
COVER ASSEMBLY. THREADING .
SWING ARM ASSEMBLY . . . . . .
CENTER OF GRAVITY MOUNTING KIT .
CABINET ASSEMBLY . . . . . . . . . . . . .
30 INCH AND 1 METER HORIZONTAL CASINETS. .
HORIZONTAL MOUNT OPERATOR PANEL.

2
6

FIGURE

. 1.

2.
3.
4.
5.
6.
7.
8.
9.
10.
11 •

12.

NUMERICAL INDEX . . . .

17

18
19

20
22
,.,AI

~'+

26
28
32
38
39

Reader's Comment Form
Business Reply Mailer

95522

EC 23953A
KIT

pIN 88125

v

I

(INTENTIONALLY LEFT BLANK)

vi

95522

HOW TO USE THE ILLUSTRATED PARTS CATALOG

GE-NERAL
Illustrations always precede their parts lists, and when possible, appear on the facing page.
The first number in each Descriptive Parts List (OPL) identifies the figure in
are shown (see Arrow 1). The index numbers (see Arrow 2) key the parts
related information in the list. On subsequent pages of the same list, the
figure number a:"ld the next line gives the index number of -the next item listed

FIGURE
&INOEX
NUMBER

OESCRIPTION

PART
NUMBER

, 2 3

1 .............

I

00002708
~2005001

I .3

~2~20021

FIGURE
& INOEX
NUMBER
I

/

'_
I

1

OESCRIPTION
1

2 3

~

2·

~.52

3

PART
NUMBER

2

~

OECK ASSEMBLY. 1910
OECK ASSEMBLY. 1920
(SEE FIGURE 1·' FOR NHA)
OPERATOR PANEL
EOT/BOT ASSEMBLY
CAPSTAN WHEEL

2 ·BKO
·BKO

2-L:~

which the listed parts
in the figures to the
first line repeats the
(Arrow 3).

CABL.E ASSEMBLY. OECK SIGNAL.
(SEE FIG. 7-6. 8, 10. 13. 22. 24, 28. -29 FOR TERMINATIONS).
CABLE ASSEMBLY. OECK SIGNAL.
(SEE FIG. 7·3. 10.22. 28. 34. 7S FOR TERMINATIONS)

42024900
42008510

I

The figure numbers and assemblies follow a logical sequence of breakdown. Any assembly that is
broken down into its component parts is identified with a BKO (breakdown) designation in place of
an index number (Arrow 4j. The first assembly listed in each DPL will always carry the BKO
designation. If an assembly is broken down (detailed) in another figure in this catalog, that figure
is referenced in the description column (Arrow 5).

FIGURE
& INOEX
NUMBER
?BKO
/'

4

·1
• 2
·3

P'ART
NUMBER
30400202
~50217

10028059
304S5501
30~1

o

~

·5

95522

10013062
10030505

OESCRIPTION /
123

~

~

FINAL A S S E M B L Y / ,
(SEE FIGURE '·29 FOR NHA)
CONTROL SWITCH PANEL ASSEMBL.Y
(SEE FIGURE 9 FOR BREAKOOWN)
NUT. HEX. 8032
AC POWER SUPPLY, 60HZ
AC POWER SUPPLY. 50HZ
(SEE FIGURE 4 FOR OETAILS)
SCREW, MACHINE. SBNH, 10-32 X .375
WASHER, L.OCK. NO. 10

'5

USABLE
ON
COOE

QTY
PER
ASM
1
1
~

,
1

3
3

vii

Oetailed figures refer back to the next higher overall view or next higher assembly (NHA) (Arrow 6).
Assemblies that are not detailed can be ordered only as complete assemblies.
A detail part may be unlisted for several reasons: it is part of a matched set. part of an assembly
that is purchased as a unit, or part of a welded or bonded assembly. If you need an unlisted part,
you must order the assembly that contains it, and not the detailed part.

LEVEL OF ASSEMBLY
The indented parts list indicates the subordination of major assemblies, subassemblies and detail
parts. Attaching hardware normally follows the detail part. The top assembly in each parts list is
level 1 (Arrow-n. Descriptions preceded by a single dot (.) (Arrow 8) are second level assemblies or
parts which are subordinate to those not preceded by a dot. Descriptions for level 3 are preceded
by two dots (••), and are subordinate to level 2 (Arrow 9).

8
FIGURE
& INDEX
NUMBER

7
• 2
·3

·~
• 5

·e
• 7

• 8
• 9
·BKO

.10

."

.12

.13

DESCRIPTION

ColE ~EMBLY. 1910
",GE ...SSEMBLY. 1920
;EE IG. 1·2 FOR NHA)
HOSE. MANUAL EXHAUST
HOSE. A\fTO EXHAUST·
HOSE. VACUUM
PNEUMATIC SUPPLY ASSEMBLY
(SEE FtG. 6 FOR OETAILS).
HOSE. EXHAUST 2.25 LONG
TUBE. FLEXIBLE 62 X 36.0
O'VERTER VALVE ASSEMBLY
CKT CD. OP, 1900 PC ASSEMBLY
CKT CO. DC. 1900 PC ASSEMBLY
FAN, AXIAL. 125 VAC, 6 IN O'A
COVER ASSEMBLY, REAR
RECTIFIER ASSEMBLY
SERVO HEAT SINK ASSEMBLY
SERVO HEAT SINK ASSEMBLY
TRANSFORMER ASSEMBLY
CABLE ASSEMBLY, SERVO SIGNAL.

-13

B
B
B

A
B

1
1

12

2

9
USABLE ON CODe
Usable On Codes identify all related parts (Arrow 10). The codes characterize differences in like
assemblies listed in the description column. In the example shown. two cage assemblies are
identified for use on the machine. The first occurrence of a code (A, B. etc.) in the Usable On
Code column identifies such assemblies (Le. the two versions of the cage assemblies are coded A
. and _ B). Subsequent occurrences of these codes identify which of the coded assemblies a
particular part is used on (Arrow 11). If there is no code identified, the part is used on all listed
codes.
There are occasions when the same part is used on more than one coded assembly and the only
difference is the 'QTY PER ASM' (Quantity Per Assembly) (Arrow 12).

viii

95522

NUMERICAL INDEX
The numerical index lists all part numbers in numerical order. The part number is cross referenced
to each figure and index number where the part can be found In the catalog. For example (Arrow
13): Part No. 00010245 can be found on Figure 7, Index No. 33.
NUMERICAL INDEX
PART
NUMBER

13

FIGURE
& tNDEX
NUMBER

00002708
~ "00010245

2·1
7-33
3-9

10037013
10cx)7015
1QCM1010

e-3 .
7·25
7·18

1~1011

PART
NUMBER

10081010
10096273
10097224
10097245
10111000
10111004

FIGURE
& INDEX
NUMBER

..1
2·7
7-31
5-3
2~
2~

PART
NUMBER

42017eoo
42017700
42017800
42017900
42018200
42018600

FIGURE
& INDEX
NUMBER

2·25
2·24
2·23
2-39
2·32
2·74

PART
NUMBER

424204(5
42420421
42420421

FIGURE
& INDEX
NUMBER

"22
2·50
2-47
. 2·16
2-33
2-65

42~

42420451
42420465

CHANGE BARS
A Change Bar (Arrow 14) indicates the latest EC revisions to a parts list. These are changes that
have occurred since the last issue date of the IPC.

14~

I

.10
0'1
.12
·13
·14
.15

42OO4eOO
42420111
42005400
42OCM700
42420337
42022200
42005200
42022100
42010900

FIL.E HUB ASSEMBLY
HUB RING
TAKEUP REEL. ASSEMBLY, MANUAL
TAKEUP REEL ASSEMBLY, AUTO LOAD
COLLAR. CLAMPTtTE
RESTRAINT COVER ASSEMBL.Y, UPPER
RESTRAINT ASSEMBLY, UPPER
RESTRAINT COVER ASSEMBL.Y, L.OWER
RESTRAINT ASSEMBLY. L.OWER

A

B

1

2
A
B
A

B

PART NUMBER COMPATIBILITY LIST
Whenever (PN COMP) (Arrow 15) appears in the part number column, refer to the machine part
number compatibility list for the latest part number.

1S---hliS
·7

• lS

• 9

42007200

(PN COMp)
(PN COMP)

110037013
.BKD
42005810
.10
42001400

95522

DIVERTER VAL.VE ASSEMBLY
CKT CO. OP, 1900 PC ASSEMBL.Y
CKT CO,
1900 PC ASSEMBLY
FAN, AXIAL, 125 VAC, 6 IN. DIA
COVER ASSEMBLY, REAR
RECTIFIER ASSEMBL.Y

3

ce,

ix

REFERENCE (REF) DESIGNATIONS
A reference (REF) designation after an index number on an illustration indicates that the part or
assembly is shown elsewhere in the same figure (Arrow 16). These designations are used as an aid
to the user in identifying parts shown in details and views.

16

I

j:

14 (REF)

21

DETAIL A

IPC STRUCTURE
The IPC is structured using the most current parts from the assembly parts lists (APls), the·
configuration control documents (CCOs), and the top level assemblies (TLAs) produced by various
engineering groups. The descriptive parts lists (OPLs) in the IPC list parts and assemblies followed
by their attaching hardware. Whenever possible, the parts and assemblies are listed in order either
in a clockwise or coun"terclockwise di'rection around the assembly, At times, the numbering
sequence appears to be discontinuous on the art, due to the locations of the attaching hardware,
or due to views or details included in the figure.
Any part number on the OPL which is followed by an asterisk (0), indicates that the part appears
on APL(S) or documents other than the ones listed on that OPL.
An assembly and its attaching hardware may be included in a OPL even though neither appears on
the APL(s) being listed in the OPL. This is done because the assembly may not be listed on a
higher APL. i.e., It may come directly from a CCO or TLA; therefore the assembly is shown in a
figure where it would logically appear. (Example: An operator panel assembly may be included in a
frame assembly OPL (and its figure) since it is attached to the frame.) In this case the part
numbers for the assembly, and its attaching hardware, are followed by an asterisk. If the assembly
in question is also broken down in the OPL, the individual parts in the assembly are assumed to
have asterisks following their part numbers.

x

95522

2920 TAPE SUBSYSTEM
ILLUSTRATED PARTS CATALOG
PN 95522

95522

1

'/lEW B .

~
1:

DETAIL B

VIEWC

DETAil A
2021

I

FIGURE 1.

2

COVER GROUP (SHEET 1 OF 2)

EC 23462
KJT PN 83411

95522

II

II

2111

FIGURE 1.

95522

COVER GROUP (SHEET 2 OF 2)

3

FIGURE
INDEX
NUMBER

- 15
- 16
- 17
- 18
- 19
- 20
-20A
-20B
-20C

403420201
403455101
403795001
403477701
404080001
402337204
403806201
403386203
404043003
10311363
10096070
10096055
403022202
403022301
403470202
404076201
(PN COMP)
10310327
10030502
10092019
403470003
403135001
403650902
404107201
10109158
403176501
403470301
403887501
403931801
404192801
403931701
403896401
403437704
404193101
10310405
403484602
10311352
10096069
10096052
403922403
40393i902
403930901
10311353

-BKD
- 21
- 22
-BKD
- 23
-23A
-23B
- 24
- 25
- 26
- 27
- 28
- 29

403420101
403478003
10203024
403665001
403440701
10017060.
10030522
403477802
403477902
10021063
10030505
10026006
10028006

1 -BKO
-BKD
-BKD
-BKD
-BKD
-

I

1

-

2

-

3
4
5

-

6

-

7

- 7A
- 8
- 9
- 10
-

11

-BKD
-BKO
-BKD
-BKD
- 12
-

13

-BKD
-BKD
-BKD
-BKD
- 14

4

PART
NUMBER

DESCRIPTION
1 234
OPERATOR PANEL,BASIC ASSEMBLY
OPERATOR PANEL GROUP,BASIC HORIZ
OPERATOR PANEL DG VERT
OPERATOR PANEL GROUP,C/G
OPERATOR PANEL ASSEMBLY.DC
OPERATOR PANEL ASSEMBLY
OPERATOR PANEL ASSEMBLY
PANEL SWITCH ASSY,HORIZ MOUNT
DC OPERATOR PANEL ASSEMBLY
SCREW.TF,TXPH.C/SEMS.6-32 X 7/16
WASHER. LOCK. SPLIT BLK OXIDE
WASHER,FLAT.NO.6 X .312 X .036 T.S
SWITCH ROCKER
ROCKER SWITCH
PANEL SWITCH HORIZ MOUNT
PLATE. SWITCH COVER
CKT.CO,KK.PC ASSEMBLY
SCREW,TXPH,ZP.4-40 X 1/4
WASHER.LOCK,HEL,MEO,PS,4
WASHER.NYLON,NO.4B
OPERATOR PANEL SUBASSEMBLY
OPERATOR PANEL ASSEMBLY
OPERATOR PANEL SUBASSEMBLY
OPERATOR PANEL SUBASSEMBLY
. STOF.SLFCLN,THRUT HO,4-40 X .25
. CONN FLEX CA"BLE
VERTICAL COVERS GROUP
COVERS GROUP.BEIGE
COVERS GROUP,BLACK
COVERS GROUP,WHITE
FRONT DOOR ASSEMaLY,BLACK
DOOR ASSEMBLY,FRO~T.BEIGE
DOOR ASSEMBLY,FRONT,CLOUD WHITE
DOOR ASSEMBLY,FRONT.WHITE
SCREW,TXPH.C/SEMS,ZP.6-32 X .500
LATCH,DOOR
SCREW.TXPH,BZ.4-40 X 3/8
WASHER. LOCK SPLIT BLK OXIDE.4
WASHER,FLAT.NO.4 X .446 X .045 T.S
LABEL,TAPE PATH
LABEL. TAPE PATH/MAINTENANCE
SIDE,PANEL
SCREW,TXPH,BZ,6-32 X 1/4
(INDEX NO.20A, B, C USED ONLY ON BLACK AND
WHITE COVERS GROUP)
HINGE GROUP
HINGE HALF.DECK
SCREW,TF,TXPH,SEM,10-32 X .625
HARDWARE ,2920
BRACKET KEEPER CLOSURE
SCREW,MACHINE,SHH, 10-32 X 1/4,PS
WASHER.LOCK,EXT,MED.PS.10
HINGE HALF,RACK BOTTOM
HINGE HALF.RACK TOP
SCREW,MACHINE,SHWH, 10-32 X 1/2
WASHER,LOCK,HEL.MED.PS,10
WASHER,FLAT,A,NO.l0
NUT, HEX. 10-32, ZP

EC 26258
KIT PiN 88375

USEABLE QTY
ON
PER
COCE
AS'"
1
1
1
1
1

A

S

e
o
E
A

C

B,D
E
-B,D
B,D

1
1
1

1
4
4
4
1
1

B,D

1

E·

1
1

A,B.e,E
A.B.C,E
A,B,e,E
A,B,e,E
A

B

e
E
A
A

4
4
6
1
1
1
1
4
1
1

1

A

1

A
A

1
1

A

1

A

1

A
A
A
A
A
A

1

5
1

2
2
2

A

1
1

1
2

A,e
A,e
A,e
A,e
A,e
A.C
A,e
A,e
A,e
A,e
A,C
A,C
A,e

1

2
4
1
1
1

1
1
1
4
4

4
4

95522

FlGUREj

INDEX
NUMBERI
1

-aKol
-BKDI
-8KO
-BKD
-BKO

-30

PART
NUMBER

403468901
403795201
403467401
403795101
403478101
402336905
403440103

403482501
-31
10096018
-32
-33 403865701
10007331
-34
-35
-361
-37 403242501
10096022
-38
10096069
-39
10096052
-40

=:~I

-43
=BKD
-44
-45
-46
-47
-48
-49

403434502
10203023
413455001
403440901
402624902
10007028
10030514
402610802
10075105
403127302

-50

10203009

-51
-BKD
-BKD
-52
-53
-54
-55
-56
-57
-58
-59

-60

95522

10075020
403SS7~01

424210201
403440701
10017060
1030522
403458504
404118801
403458404
404118701
10030505
10026006
10028006

I
I

DESCRIPTION
; 2 3

~

MOUNTING GROUP.VE~TrCAl
-- VERT
MOUNTING GROUP.MA~
MOUNTING GROUP.HeRIZ
MOUNTING GROUP.D.G. VERT
MOUNTING GROUP.C/G
COVER ASSEMBLY THREADING VERT
COVER ASSEMBLY THREADING HORIZ
(SEE FIG 7 FOR MOUNTING HARWARE AND OETAIlS)
SENSOR HOLE COVER
SCREW.MACH!NE.SFHC.6-32 X 3/8
LEADER SENSE HOUSING ASSEMBLY
SCREW.SHC.6-32 X l.oo.STL.SD
DELETED
DELETED
DOOR CATCH
SCREW.MACHINE.SBNH.4-40 X 3/S.S0
WASHER LOCK SPLIT. BlK OXIDE
WASHER.FlAT.NO.4 X .446 X .045 T.S
CLOSURE BRACKET
SCREW.TF.TXPH.SEM.l0-32 X .50
CLIP SNAP IN
VERTICAL VACUUM SEAL
· MUD FLAP ASSEMSLY
· SCREW.SHC.6-32 X .625
· WASHER.lOCK.!NT.NO 6
CABLE ASSEMBLY.KEYBOARD
CABLE ClAMP.FLAT.ADH BACK.t.S
LATCH DECK
SCREW.TF.TXPH.SEM.6-32 X .50
CA-CLP.T.3/4
SHIP GROUP - 1 INCH HINGE VERT
1 INCH SOlT HINGE.VERT SHIP GROUP
S~~CKET KEEPER CLOSURE
SCREW.MACHINE.SHH.l0-32 X 1/4.PS
WASHER.LOCK.EXT.MED.PS.l0
H!NGE.HALF.RACK.SOT 1 INCH
Hr~GE,HALF.SOTTOM

HINGE.HALF.RACK.TOP 1 INCH
HINGE.HALF.TOP
WASHER.LOCK.HEL.MED.PS.l0
WASHER.FLAT.A.l0
NUT.HEX.l0-32.ZP

EC 26406
KIT P/N 88392

USEABLE QTV
ON
PER
ASM
CODE
A

.

A

-

1

C

S
C

o
A.C
A1I .B.D
A*.B.D
A* .B.D
A.C
A.C
S.C
S.C
S.C
B.C
0
0
S.D
A,C
A.C
A.e
A.C
A .A".C
A .A"'.C
A.A"'.
S.C
A.A",
S.C
A.C
A
B

1

2
1

2

1

2
2
2
2
4
5
1
1

3
3

2

I
1

2
2
A
S
A

•

8

I

4
4
4

5

2009

I

FIGURE 2.

6

BASIC ASSEMBLY (SHEET 1 OF 5)
EC 23490
Kit PiN 88011

95522

!=!GUREI
INDEX
NUMBER,

i

2 -BKO! .103467301
-8KD 40396200~
-BKDI 404042801
-SKDI 402370902
-1
10097221
10091222
-2
-3 402339907
-4
42420324
-5 403442802
-6
10096304
-7
10030505
-8
401209304
-9
10013012
~101 402339303
-11
10007027
-12
10030503
-13 402573701
-14
10410204
-BKD 403479103
- 151
10090005
-16
10025014
-17
10308401
-18 . 403469003
-19 403802401
-20
10001202
-BKD 403375301
-21
10001021
-22
10030503
-23 401292314
-24
-25
-26
-21
-28

DESCRIPTION

PART
NUMBER

403376601
10204013
403315201
403376502
404077301

1 2 3 -l

I

BASIC ASSEMBLY.2920 MTS
BASIC ASSEMBLY.2922(CACHE)MTS
3ASIC ASSEMBLY.DC POWER GROUP
COVER ASSEMBLY.SEAL
· FASTENER
· FASTENER
· COVER. SEAL
CAP.HUB
FLANGE.FRONT.AUTO LOAD
SCREW.MACHINE.SHC.10-32 X .625
WASHER,LOCK,NO.10
FLANGE,REAR.MACHINE.REEL
SCREW.MACHINE.S8NH.4-40 X .250
HU8.TAKEUP REEL
SCREw.MACHINE.SHC.6-32 X .SCO.PS
WASHER,LOCK,HEL.MED.PS.NO.6
COLLAR,MOUNTING
CONNECTOR.BANANA JACK.UNINSULATED
OIVERTER ASSEMBLY. THREADING
RING,RETAINING.EXT .. 125
· PIN. DOWEL
· SPRING. EXT
· OIVERfER.THREADING
HUB CAP ASSEMBLY
SCREW.MACHINE.SHC.4-40 X 1.S
FILE PROTECT ASSEMBLY
SCREW.MACHINE.SHC.6-32 X 1/2
WASHER.LOCK.HEL,MED.PS,6
FILE HUB SUBASSEMBLY.MANUAL
(SEE FIGURE 6 FOR BREAKDOWN)
RING. FILE PROTECT
~CREW.TXPH.6-19 X .625
SPRING.FILE PROTECT
BUSHING. FILE PROTECT
SUPPORT.REEL REMOVAL

EC 26087

95522
J(

H

PIN 881.13

USEABLE QTY
ON
PER
CODE
ASM
A
B

1
I 1

C

1
1

3
3

1

3
3
1

6
1

3

1
1

3
1

3
3

1

3
3
3

7

I

2111

I

FIGURE 2.

8

BASIC ASSEMBLY (SHEET 2 OF 5)

EC 50524
KIT PN 83215

95522

FIGURE
INDEX
NUMBER

PART
NUMBER

2- 29 402338908
30 1402339009- 31 403651502- 32
10013024
- 33 403631701- 34 403391101
- 35
- 36 402606604
- 37 402603703
- 38 402390702
- 39 402390802
- 40 402390902
- 411 402391002
- 42 402390002
10008026
- 43
10030503
- 44
- 45 403579001
- 46 403554502
10008031
- 47
- 48 403081406
10007202
- 49
- 50 402552003
10090033
- 51
- 52 403069302
-BKD 403540701
- 53 403071001
- 54 402545207
- 55 403137601
-56 402340506
- 57 402336703
f009OO33
- 58
- 59 -403069302
-BKD 403469801
- 60 403071001
- 61 403469701
- 62 403137601
- 63 402340506
- 64 403470103
10311363
- 65
10030514
- 66
- 67 402338908
-67A 402339009
10013024
-67B
-67C 403391101
-670

95522

DESCRIPTION
1

234
BEARING. GUIDE
FLANGE.GUIDE BEARING
REAR GUIDE FLANGE
SCREW.MACHINE.SBNH.6-32 X .250.PS
THREADING RESTRAINT
SCREW. SHOULDER GUIDE
DELETED
CERAMIC R/W HEAD ASSEMBLY
SKEW BLOCK ASSEMBLY
SHIM. SKEW •. 001
SHIM. SKEW •. 002
SHIM. SKEW, .004
SHIM, SKEW, .006
SHIM, SKEW, .010
SCREW,MACHINE,SHC.6-32 X 3/8,SS
WASHER.LOCK,HEL,MED.PS.NO.6
FILLER.BLOCK MOLDED
CLEANER ASSEMBLY
SCREW.SCH,6-32 X 1.0
EOT/BOT ASSEMBLY
SCRE~,MACHINE,SHC,4-40 X 1.CO,PS
ROLLER ASSEMBLY.CROWNED
RING.RETAINING,EXT •. 125,S/PH
WASHER.ROLLER
ROLLER SUBASSEMBLY,CROWNED
BEARING.BALL
ROLLER ,CROWNED
SPRING, ROLLER
POST,FIXED ROLLER
ROLLER ASSEMBLY,FLANGED FLAT
RING,RETAINING,EXT .. 125,S/PH
WASHER,ROLLER
ROLLER SUBASSEMBLY.FLAT
BEARING,BALL
ROLLER.2920 FLAT
SPRING. ROLLER
POST,FIXED ROLLER
COVER PLATE.CARD CAGE
SCREW,TF,TXPH.C/SEMS.6-32 X 7/16
WASHER,LOCK,INT,MED,PS,6
8EARING,GUIDE
FLANGE,GUIDE BEARING
SCREW,MACHINE,SBNH,6-32 X .250,PS
SCREW, SHOULDER GUIOE
DELETED

EC 26258
KIT PiN 88375

USEABLE QTY
ON
PER
CODE
ASM
1

1
1

2
1

2

1

7
4
1

1
1
1

2
1

1
1
1
2
1
1
1
2
1
1
2
1
1

1
1

C

4
4
1
2
2
2

9

I

7t

f'

73

i

f'
I" "
I
I

I

"

/

70

'-~,

I

6!

'~

1

I
I

I

nI
l

I

I
I
I
I
I

I

,

"

I'/~

80

79

2002

I

FIGURE 2.

10

BASIC ASSEMBLY (SHEET 3 OF 5)

EC 23462
KIT FIN

~11

95522

FIGURE
INDEX
NUMBER

PART
NUMBER

-68

403219205

-69'

10007070
10030505
10026006
402553003
10206239
403231002
402340006
402560108

-70
-71
-BKD
-72
-73
-74
-75

10007032
-76
10030503
-77
-78 1 402560208
10007032
-79
10030503
-80
-81 403156502
-82 403522001
10203012
-83
-84 403826001«
403123804
-85
-86
-87
-88
-BKD
-89
-90
-91
-92
-93
-94
-95
-96
-97
-98
-99
-100
-101
-102

-103

95522

10007033
10030503
402271201
403125302
402338302
402338401
10013026
10030520
403854201
403853901
403096302
10203008
10013015
10030502
402637801
10007014
10027014
403862401

DESCRIPTION
123 4
BLOWER ASSEMBLY
(SEE FIGURE 5 FOR DETAILS)
SCREW,MACHINE,SHC,10-32 X 1.75,PS
WASHER,LOCK,HEL,MED,NO.10,PS
WASHER.FLAT.A.NO.10
COVER ASSEMBLY.REAR
SCREW.MAC,SEMS.TXPH,10-32 X 3/8
· GASKET,REAR COVER
· COVER.REAR
SWING ARM ASSEMBLY.UPPER
(SEE FIGURE 8 FOR BREAKDOWN)
SCREW,MACHINE,SHC.6-32 X .250
WASHER,LOCK,HEL,MED,PS,NO.6
SWING ARM ASSEMBLY,LOWER
(SEE FIGURE 8 FOR BREAKDOWN)
SCREW,MACHINE,SHC,6-32 X .250
WASHER,LOCK.HEL,MED,PS.NO.6
SPRING, TENSION
BUMPER. SWING ARM
SCREW,TF.TXPH,SEM.6-32 X .87
RETRACTOR ASSEMBLY W/MOUNT SCREWS (FUO)
RETRACTOR ASSEMBLY
(SEE FIGURE 3 FOR BREAKDOWN)
SCREW.MACHINE.SHC.6-32 X 1.S,PS
WASHER,LOCK,HEL.MED,PS,NO.6
DELETED
DELETED
MOTOR 'ASSEMBLY ,CAPSTAN
SCREW,SOCKET HEAD CAP
· MOTOR,CAPSTAN
· WHEEL.CAPSTAN
SCREW,MACHINE,SBNH,6-32 X 3/8,PS
WASHER,LOCK,EXT.MED.PS.6
SPRING,MOTOR ASSEMBLY
SEAL,CAPSTAN MOTOR
PLATE,MTG,EOT/BOT CONNECTOR
SCREW.TF,TXPH,SEM,6-32 X .37
SCREW,MACHINE,SBNH.4-40 X .50,PS
WASHER,LOCK.HEL,MED,PS.4
SENSE ASSEMBLY,FILE PROTECT
SCREW,MACHINE,SHC,4-40 X .375.PS
WASHER.FLAT,B,NO.4,N
FILLER BLOCK,OECK

EC 26180
Kit PiN 88201

USEABLE QTY
ON
PER
CODE
ASM

I

1

4
4
4
1

12
1

3
3
3
3
2
2
2

I I
4
4

1
3
1
1
1
1

3
1
1

2
2
2

1

11

I

117

112A

./

./

113
114

<

~

14.
(FIEF)

VIEW A

2010

FIGURE 2. BASIC

I
12

ASSEMB~Y

EC 26393
KIT PIN 88387

ISHEET 4 OF 5)
95522

FIGURE
INDEX
NUMBER

PART
NUMBER

402271403
"'"
l020;J024
eKD 1 402271301
10203024
- 106
- 107 402278102
- 108 402573701
10041170
- 109
- 110
10097203
- 111
- 112 403177503
404073003*

2- 104
- 105

-112A

404076003
10203024
- 114
10030522
- 115
00029526
00029526
~ 116
403859703
404042902*
117
10203024
1
10310493*
1
118
10030522
- 119 10080078*
- 120 403198201
- 121
10203024
- 122
10030522
- 123
10075020
10075020
10058094
- 124
10203008
- 125
- 126 402584501
127 403215502
- B-KD 403257203
1-0203009
- 128
10049051
- 129
10057075
- 130
- 131 403370503
10005027
- 132
10027019
- 133
-133A 10017232*
-133B 404076303*
-133C 10096018'41
10075063
-134
-135 402375504
-135A 404029103
-136 403214301
10080118
-137
10080132
138
10075131
-139
1
-140 403376303
-141
10203008
-142 403496001
-143
10096316
-144 402339603
-145 403840101
-146 403458811
1131

95522

USEABLE QTY
PER
ON
CODE
ASM

DESCRIPTION
1

2 3

4-

-

.-

MOTOR ASSEMBLY.REEL
.. e.
.... ...... v ,.. ...
.,. IF. IAPH.SCM.
S~KEw.
IV ~~ A .O~
MOTOR ASSEMBLY.FILE REEL
SCREW.TF.TXPH.SEM.10-32 X .62
· MOTOR REEL
· COLLAR ASSEMBLY.MOUNTING
· CONN.RE,PWB.M,3.C •. 84 •. 250
DELETED
BUSHING. STRAIN RELIEF
FAN ASSEMBLY
. DC FAN ASSEMBLY
(SEE FIGURE 4 FOR DETAILS)
HOOD,FAN
SCREW,iF.iXPH.SEM, 10-32 X .62
WASHER.LOCK,EXT,MED,PS.10
DECAL,GROUND LOCATION
DECAL.GROUND LOCATION
REGULATOR ASSEMBLY.CACHE
POWER SUPPLY ASSEMBLY,DC
SCREW.TF.TXPH,SEM.10-32 X .62
SCREW.TXPH.C/SEM,ZP.1/4-20 X 3/4

--

... 'V

I ...1

I

~

4
1
1

C

C
;

A.B
C
A.B
C
A,B
C

1
3

I
1
4
1

WASHER.LOCK,EXT.MEO,PS.10
FUSE.20A.60V.3AB.VERY FAST
CABLE ASSEMBLY,GROUND DECK TO FRAME
SCREW,TF,TXPH.SEM,10-32 X .62
WASHER.LOCK.EXT,MED.PS.NO.10
CABLE TIE.3/4
CABLE TIE.3/4
LINE FILTER.10A.220 VAC,4oo Hz
SCREW.RF,TXPH,SEM,6-32 X .375
VARISTOR ASSEMBLY
CABLE HARNESS.AC
CAPACITOR.INSULATED.6-UF.660V
SCREW.TF.TXPH.SEM,6-32 X .500
CAP,AC.6% 660 VAC.POLY.6.0 UF
TUBE.EL.SHRINK.21oo/1.oo.IEC
BRACKET.CAPACITOR
SCREW,MACHINE.SPH.6-32 X .5CO.PS
WASHER.FLAT.B.NO.6.N
CB,T.1P.25A.65 VDC.lEC
PLATE,POWER.SWITCH
SCREW.MACHINE.SFHC.6-32 X 3/a.BLZ
CA-CLP,ADJ/REL.3/16 - 11/16
CABLE HARNESS MOTORS
EDGE LINER .. 05-.12,POLY.3.00
· FUSE HOLDER. IN-LINE. 18-22GA
· FUSE, .75A.250V.SLO-BLO
· FUSE.4A.250V.SLO-BLO
CABLE TIE.REL.NY.5.0" MAX OIA
SWITCH ASSEMBLY~INTERLOCK
SCREW.TF.TXPH.6-32 X .375
MALE CONNECTOR.FTG
CLAMP,HOSE .. 87/38.WORM DRV
CABLE HARNESS SENSOR
CABLE HARNESS. POWER CACHE
DECK DIE.2920

EC 26499
KIT pIN 88536

I

A.B
C
A.B
A,B
A.B
A,B
A.B
A,B
A.B
A,B
A.B
A.B
A.B
C

1
1
2
2
2
1
1
2
1
1
1

3
1

AR
1
1
1
.1

C

1

C

2
2

C

3
2

1

1

2

13

"

r

1&1

166

DETAIL A

J-.f.j~-#--H---.--13& 137
~~'.4!tp.~t-r- 123 (REF)
'-l1-~--t--138

138
145
(REF)

141--,/
2023

FIGURE 2. BASIC ASSEMBLY (SHEET 5 OF 5)

I
14

EC 26393
KIT

PIN 88387

95522

FIGURE
INDEX
NUMBER
2 -BKD
-SKD
-aKDI
-BKQ
-BKD
-BKO
-BKD
-BKD
-BKO
-BKO
-BKD
-aKD
-aKD
-aKD

PART
'NUMBER
~03420oo1

403568401
403532101
403517701
403539001
403826301
403851001
404072101
404072201
..t04076601
404076701
404082901
404080201
404080301
-8KOI 404080401
-BKD 404080501
-BKD 404080601
-aKO 404080701
-aKD 404186501
-aKDI 404173601
-aKD 403612601
-aKD 403612701
-SKO t 4036~2801
-8KD 403613001
-8KD 403612901
-aKD 403922801
-BKD 403922701
-aKD 404072301
-aKD 404072401
-8KD 404076801
-aKD 404076901
-BKD 404083001
-BKD 404080901
-BKD 404081001
-BKD 404081101
-aKD 404081201
-BKD 404081301
-BKD 404081401
-aKD 404186601
-SKD 404173902
-BKD 403629405
-aKD 404072901
-147
10203024-BKD 402336808
-148 402340608
-149 402340701
-150 (PN COMP)
10075022
:-151
10026006
-152
-152A 404081601
10028061
-153
10078177
-154
10026004
-155
10030503
-156
-157
10028003
10030514
-158
10030515
-159
10075063
-160
-161
10075105
10097444
-161A
-161B
-161C
-1610

95522

DESCRIPTION
1

234

STD.CARDS.AND CAGE
A117.CARDS AND CAGE
INO STD.CARDS AND CAGE
CARD SET INO STO 100 IPS
100 IPS.CAROS AND CAGE
·CARD SET.CACHE
CARD SET.CACHE.IND STD
CARD SET.CACHE.LOW DR.15
CARD SET.CACHE.~ARITY.15
CARD SET.CACHE.SINGLE-ENDED
CARD SET.CACHE,DIFFERENTIAL
CARD SET.CACHE.VS INTERFACE
100 IPS CARD SET.SiD-DC
100 IPS CARD SET.I/S-DC
CARD SET.CACHE.SfO-OC
CARD SET.CACHE.I/S-OC
CARD SET.CACHE.SINGLE-END/DC
CARD SET.CACHE.DIFF/DC
CARD SET.CACHE.NRSK DIFF
CARD SET.STO.l00 !PS.HSI
POPULATED STD CARD CAGE
POPULATED A117 CARD CAGE
POPULATED IND SiC CARD CAGE
POPULATED 100 INO.STD CARD CAGE
POPULATED 100 IPS CARD CAGE
POPULATED CARD CAGE.CACHE
POPULATED IND STD CARD CAGE,CACHE
POPULATED CARD CAGE.CACHE,LOW DR
POPULATED CARD CAGE.CACHE,PARITY
POPULATED CARD CAGE. SINGLE-ENDED
POPULATED CARD CAGE.DIFFERENTIAL
POPULATED'CARD CAGE,CACHE VS
POPULATED CARD CAGE. 100 IPS STOIDC
POPULATED CARD CAGE. 100 IPS liS-DC
POPULATED CARD CAGE.CACHE STD-DC
POPULATED CARD CAGE.CACHE I/S-DC
POPULATED CARD CAGE,CACHE SINGLE-END/DC
POPULATED CARD CAGE,CACHE DlFF/DC
POPULATED CARD CAGE.NRSK DIFF
POPULATED 100 IPS.CARD CAGE/HSI
CARD CAGE ASSEMBLY
DC CARD CAGE ASSEMBLY
SCREW.TF,TXPH,SEM,10-32 X .625
CARD CAGE SUBASSEMBLY
. CARD CAGE
. GUIDE.CARD,SNAP-IN
CKT CD,MDB.PCC ASSEMBLY
CA-CLP.T. 1.75.NO. 10
WASHER.FlAT,A.NO. ~O
WASHER. SHOULDER
NUT,KEPS.W/WASHER.PS.10-32
RELAY.SS.PHOTO ISOL, 1P, 1T.SA.80
WASHER.FLAT.A.NO.6
WASHER.LOCK.HEL.MED.PS.6
NUT.HEX.6-32.2P
WASHER.LOCK.INT.MED.PS.6
WASHER.LOCK.lNT.MED.PS.8
CA-CLP.ADJ/REL.3/16 - 11/16
CA-CLP.FLAT,ADH BACK. 1.0 INCH MAX
TERMINATOR.SCSI.DIFFERENTIAL
DELETED
DELETED
DELETED

EC 26393
KIT PIN 88387

USEABLE QTY
PER
ON
CODE
ASM
A
B
,..
....
0
E
F
G
H

1

I.
1
I

I

J

K
L
M

N
0
P
Q

R
S
T
U

A
B
C

0
E
F
G
H

J
K

L
M

N
0

P
Q

R
S
T
U

A-M,T,U
N-S
4
1
1
12
1
1

N-S

8
16
8
1
2
2
2
2
2
~

T

I
15

~SEABLE

FIGURE

I/ INDEX

jNUMBER

f,2-

.

-8KD
-6KD
-SKD
-SKD
-BKD
-BKD
-BKD
-8KD
-8KD
-8KD
-8KD
-8KD
-8KD
-BKD
-BKD
-8KD
-8KD
-8KD
-162

-163
-164
-16.5

PART
NUMBER
403615601
J.03615501
J.03481901
403419601
403419501
403107901
403419401
403108002
J.03840601
J.03840101.
J.03840801
J.03840901
J.03841201
403841301
404026001
404026201
404026401
404026101
J.03615303
403255504
402573506
.103840502
403841102
J.04025101
..+0402.5.90 1
J.04026301
J.04025801
10203032
10015020
J.03215602
403215601
10011158

-8KD
-BKD
-8KD
-SKD
-8KD
-8KD
-8KD
-BKD
-8KD
-BKD
-166
-161
-168
-169
-110

-111
-112
-113

I
16

-8KD
-8KD
-174
-115
-116
-111

DESCRIPTION
123 4
50
50
50
SO
SO
50
60
60
50
50
50
50
60
60
60
50
60
50

HZ. 100 V.DG STRIP LEADS
Hz. 120 V.DG STRIP LEADS
Hz.220 V.POWER.OPT.NEMA.6-15
HZ.240 V.STRIP LEADS
Hz.200 V.STRIP LEADS
Hz.220 V.STRIP LEADS
Hz. 100 V.NEMA.5-15
Hz. 120 V.POWER.OPT.NEMA.5-15
Hz.220 V.STRIP LEADS CACHE
Hz.200 V.STRIP LEADS CACHE
HZ.240 V.STRIP LEADS CACHE
Hz.220 V.NEMA.6-15 CACHE
Hz. 120 V.NEMA.5-15 CACHE
Hz. 100 V.NEMA.5-15 CACHE
Hz. 120 V.50 IPS DG
Hz.220 V.6-15 DG
Hz. 120 V.100 IPS DG
Hz.220 V.NEMA DG
XFMR PK ASSEMBLY. 10 AMP
XFMR PK ASSEMBLY.50 Hz
XFMR PK ASSEMBLY.60 Hz
XFMR PK ASSEMBLY.50 Hz CACHE
XFMR PK ASSEMBLY.60 Hz CACHE
XFMR PK ASSEMBLY.60 Hz. 120 V.DG
XFMR PKAS-S-EMBL Y ,50 Hz.220 V. DG
XFMR PK ASSEMBLY ,60 HZ. 120 V.DG
XFMR PK ASSEMBLY.50 Hz.220 V.DG
SCREW.TF.TXPH.SEM.1/4-20 X .75
CABLE CLAMP,T.3/4
CIRCUIT BREAKER ASSEMBLY. 10 AMP
CIRCUIT BREAKER ASSEMBLY.7.5 AMP
C8.R.2F.PO.SNAP.RLY.IEC

403514001
J.03931801
"+04083101
404175201
404115401
403835701
403931901
404084101
404175101
404115301
(PN CCMP)
(PN CaMP)
(PN COMP)
(PN COMP)
(PN COMP)
10203008
10203009
10028058
J.03619501
J.03521001
10015101

PA/PB INTERFA~E ASSEMBLY
PA/PB INTERFACE ASSEMBLY.CACHE
VS INTERFACE ASSEMBLY
PA/P8 INTERFACE ASSEMBLY.CACHE.DC
PA/P8 INTERFACE ASSEM8LY,2921/2922.DC
PA/PB INTERFACE SUBASSEMBLY
PA/PB INTERFACE SU8ASSEMBLY.CACHE
VS INTERFACE SUBASSEMBLY
PA/PB INTERFACE SU8ASSEMBLY.CACHE,DC
PA/PB INTERFACE SUBASSEMBLY,DC
CKT CD,PA,ASSEMBLY
PWA.PW
PWA,PA-DC
CKT CD.PB.ASSEMBLY
PWA,P8-DC
SCREW.RF.TXPH,SEM,6-32 x .37
SCREW,TF,TXPH,SEM.6-32 X .50
NUT,HEX.6-32
STDF.MF,H.6-32 x .38.S.ZINC PLT
CABLE ASSEMBLY.60 PIN PERTEC
CA-CLP.FLAT.ADH BACK.3.0 INCHES MAX

404208801
404208901
402339803
404192701
10310529
404186001
10310405

POWER CORD SELECT,REGULAR
POWER CORD SELECT.SHIELDED
CCRD POWER
CCRD POWER SHIELDED
SCREW.TXPH,C/SEMS.ZP,4-40 X 3/8
SiANDOFF.~aWER,CONNECTaR

SCREW.TXPH.C/SEMS.ZP,6-32 x 3/8

EC 26393
KIT PIN 88381

ON
CODE

QTY
PER
ASM

A

1

B

1

C

1
1
1
1
1
1
1
1
1
1
1
1.
1
1
1
1
1
1
1
1
1
1
1
1
1
4
1
1

D
E
F
G
H

J
K
L
M
N
P

Q
R

S
T

A.B
C,D.E.F
G,H
J,K.L.M

N.P
Q
R

S
T

A.B.H.N
C.D,E.F
J,K,L,M

1

G.p

1

A

1
1

8
C
D
E

jI

A

8
C
D
E

A.S
C

D.E
A,8
D.E
A,8
A.8
A.8

1
1
1
1
1
1
1
1
1
4
1

4

2
1

A

8
A

8
8
8
8

1
1
1
1

2
1

2

95522

I

~1'
.........
.........

2114

FIGURE 3.

RETRACTOR ASSEMBLY

I FIGURE
& INDEX
NUMBER

PART
NUMBER

3 -BKD

403123804

•
-

403123501
10007014
10030502
10027013
403124003
10007014
10030502
10027013
403114006
10094021
403123604
403224601
403823001
403390901
10007027
10030503
-'03391202

1
2
3
4
5

· 6
- 7
• 8

- 9
-10
-11
-12
-13
-14
-15
-16
·17

DESCRIPTION
1 2

3

4

RETRACTOR ASSEMBLY
(SEE FIGURE 2-84 FOR NHA)
GEAR MOTOR ASSEMBLY
SCREW, MACHINE, SHC, 4-40 X 318, PS
WASHER, LOCK.HEL. MED,PS,4
WASHER, FLAT, B, NO.4, N
CONNECTING ROO END ASSEMBLY
SCREW, MACHINE, SHC, 4-40 X 318, PS
WASHER, LOCK, HE~ MED, PS,4
WASHER, FLAT, B. NO.4, N
SPUR GEAR
SCREW, SET, SCPo SL, 8-32 X 3116
CONNECTING ROO ASSEMBLY
GASKET, RETRACTOR
HALF GASKET, RETRACTOR
PLATE, MOTOR MOUNT
SCREW, MACHINE, SHC, 6-32 X 112, PS
WASHER, LOCK, HE~ MED, PS,6
BLOCK, GUIDE

USABLE ON
CODE

QTY
PER
ASM

1
1
3
3
3
1
1
1
1
1
1
1
1
1
1
4
4
2

•

95522-301

95522

EC 50503
KIT PN 83102

17

z--iI

12---.
11~

"

5

3

I
7

I

11--- I '10""-:>
IO,V.;J

,

v:IHI'tUI..U

i

t')

I"'Ufll\l~l:n

l:onllJl

I:TI:I n

EC NO.
Ufl.t..;nA_

t: tH: of '7

FIELD
APL.

-";v-"; j ; i-Jl

~O~J!t"\
uo;:,.,::;

EQUIVALENT TO 403118303/
403 AND 403807303.

22810

NONE

EQUIVALENT TO 403118303/
403 AND 403807304.

23065 _

NONE

CHANGED FROM FIELD MANDATORY TO FIELD EXC~PTIONAL.
EC22577 IS A PREREQUISITE.

50517A

68949

EQUIVALENT TO 403118203/
403 AND 403807303.

22810

NONE

EQUIVALENT TO 403118203/

23065

NONE

INITIAL RELEASE OF IMBED.
EQUIVALENT TO 403118203/
303 AND 403807303.

22810

NONE

EQUIVALENT TO 403118203/
303 AND 403807304.

23065

NONE

I r\UIYI

," JoeL-V

Itll-\I'H.J~-

.A•

TORY TO FIELD EXCEPTIONAL.
EC22577 IS A PREREQUISITE.

*403118303

2

403 AND 403807304.

*4031184G3

2

*403118204

2

REMOVE ALTERNATE SOURCE FROM
APL. EQUIVALENT TO 403118304/
404/403807305.

23707

NONE

*403118304

2

REMOVE ALTERNATE SOURCE FROM
APL. EQUIVALENT TO 403118204/
404/403807305.

23707

NONE

*403118404

2

REMOVE ALTERNATE SOURCE FROM
APL. EQUIVALENT TO 403118204/
304/403807305.

23707

NONE

PN 95523

STORAGE TECHNOLOGY CORPORATION

PAGE 3-16A

;

I

•

CD. TYPE: DP-50
CD LOC: A5
MACHINE: 2921
DESCRIPTION - DATA PATH CARD
PG EC LEVEL - 23694 DATE: 07/87

CARD

PN

403118205

COMPo
NO.
2

F lEU

EC NO.

APL.

LATCH INTERFACE STOP FOR
USE WITH ALTERNATE XBR.
EQUIVALENT TO 403118305/

2369!

NONE

LATCH INTERFACE STOP FOR
USE WITH ALTERNATE XBR.
EQUIVALENT TO 403118205/

23694

NONE

LATCH INTERFACE STOP FOR
USE WITH ALTERNAiE XBR.
ALENT TO 403118205/

23694

Nn~lj:
-.".'4 ....

DESCRIPTION

OF

EC

405/403807305.
403118305

t"I
L

405/403807305.
403118405

2

305/403807305.

PN 95523

STORAGE TECHNOLOGY CORPORATION

PAGE 3-16E

CD TYPE: DP-SO
CD LOC: A5
MACHINE: 2921
DESCRIPTION - DATA PATH SOIPS
PG EC LEVEL - 23694 DATE: 07/87

CARD PN·

COMPo
NO.

*403807302°

*403807303

403807305

2

2

.- "I' I"" I

DESCRIPTION OF EC

EC NO.

APL.

THIS CARD IS AN
INTERIM CARD FOR A GIVEN
NUMBER OF BOARDS. EQUIVALENT TO 403118302

49915

NONE

LATCH n+BLOCK LINE FOR
READ OF PE 10 WTTH CREASE.
FIB RELEASED AS REWORK
AND FIELD MANDATORY.
EC 50520 IS A PREREQUISITE.

50517

68949

CHANGfD FROM FIELD MANDATORY TG FIELD EXCEPTIONAL.
EC22577 IS A PREREQUISITE.

50517A

68949

EQUIVALENT TO 4031182031
303/403.

22810A

NONE

REDUCE "TREO" DELAY TO
PREVENT OVERRUNS. EQUIVALENT TO 403118203/303/403.

23065

NONE

REMOVE ALTERNATE SOURCE
FROM APL. EQUIVALENT TO
403118204/304/404.

23707

NONE

EQUIVALENT TO 4031182051

23694

NONE

II

305/405.

PN 95523

f".

r.LI:.LU

STORAGE TECHNOLOGY CORPORATION

Page 3-17

CD TYPE: DP-100
CD LOC: A5
MACHINE: 2922, 2925
DESCRIPTION - DATA PATH 1COIPS
PG EC LEVEL - 23977 DATE: 11/87

CARD PN

COMPo
NO.

*403499201
*403499202

~

!

*403633301
*403633302

1")'

'"

FIE!

DESCRIPTION OF EC

EC NO.

A-I
r'_

INITIAL RELEASE OF
100 IPS DP CARD.

49655

NONf

DELAY TREQ TO IF CARO"BY
CHANGING LS74 TO S74 AND
USE A +S'OR C CLK IN PLACE
OF -B elK.

49841

*68~

INACTIVE. REPLACED BY
403633301.

49916

NONE

INITIAL RELEASE OF EMBED'
FOR 100IPS.

49916

*68~

LATCH "+BLOCK LINE FOR
READ OF PE 10 WITH CREASE.
FIB RELEASED AS REWORK
AND FI~LD MANDATORY.
EC 50520 IS A PREREQUISITE.

50517

689£

CHANGED FROM FIELD MANDATORY TO FIELD EXCEPTIONAL.
EC22577 IS A PREREQUISITE.

50517A

689~

II

*403633303

2

REMOVE ALTERNATE
SOURCE FROM APL.

23707

NONE

*403633304

2

CHANGE CLOCK USED TO
23695
LATCH HOST TRAK AND STOP FOR USE WITH
ALTERNATE XBR.

NONE

*403633305

2

CHANGE + BUPER CLOCK TO PREVENT FALSE ERRORS CAUSED BY
+ PARITY ERROR ASYNC NOISE.
ALSO CORRECT TRAKICARRY TIMING IN GCR 100 IPS iO PREVENT OVERRUN,.

NONE

PN 95523

STORAGE TECHNOLOGY CORPORATION

23977

PAGE 3-1

CD TYPE: DP
CD LOC: AS
MACHINE: 2920 TAPE UNIT
DESCRIPTION - DATA PATH 100IPS
PG EC LEVEL - 26237
DATE: 02/88

CARD PN

COMPo
NO.

*403633305

403633307

PN 95523

DESCRIPTION OF EC

EC NO.

2

ADD INVERTOR TO PRODUCE CARRY
FROM AND CARRY TO AVOID 16D
DAIGNOSTIC FAILURE ON
POWER UP.

26108

2

ADD 100PFD CAPACITOR TO OUTPUT OF KA27. THIS CORRECTS A
FACTORY PROBLEM ON SUPPLIER
74LS74 DATE CODES 8731 & 8739.
INDUSTRY STANDARDS DIAG FAIL
126202 FRAME LENGTH ERRORS.
FIB UPDATE ONLY.

26237

STORAGE TECHNOLOGY CORPORATION

FIELD
APL.
"NONE

68949

Page 3-18A

CD TYPE:- DP, SSI
C.D LOC: A5
MACHINE: 2920 TAPE UNIT
DESCRIPTION - DATA PATH
PG EC LEVEL - 26237 DATE: 02/88

CARD PN

COMPo
NO.

DESCRIPTION OF EC

EC

*404171201

1

INITIAL RELEASE OF SLOW
SPEED INTERFACES.

26059

NONE

ADD 100PFD CAPACITOR TO OUT-

26237

NONE

404171202

PN 95523

PUT OF KA27. THIS CORRECTS A
FACTORY PROBLEM ON SUPPLIER
74LS74 DATE CODES 8731 & 8739.
INDUSTRY STANDARDS DIAG FAIL
126202 FRAME LENGTH ERRORS.

STORAGE TECHNOLOGY CORPORATION

~O.

FIELD
APL.

CD -TYPE: EDT/BOT.
CD LOC: DECK
MACHINE: 2921, 2922, 2925
DESCRIPTION - EOT/BOrSENSOR
PG EC LEVEL - 49826 . DATE: 02/85
COMPo
NO.

DESCRIPTION OF EC

EC NO.

FIELD
APL.

*403081201

INITIAL RELEASE

49204

NONE

*403081202

ADD NOSE TO HOUSING TO
ASSURE PROPER TAPE-SENSOR
DISTANCE.

49376

NONE

RELEASE OF IMBED.

49471

68356

49504

68441

49826

NONE

CARD PN

*403081303

2

I~ITIAL

*403081304

2

ADD HOLE FOR LOCATING
PIN AND GROOVE TO REDUCE
INTERNAL REFLEXTION TO
HOUSING.- MUST 8E INSTALLED
CONCURRENTLY WITH EC 49563.
F /8 68451.

403081404

PN 95523

2

CHANGED LENGTH OF THE CARD
.080 TO AVOID INTERFERENCE
BETWEEN CARD AND CONNECTOR.

STORAGE TECHNOLOGY CORPORATION

Page 3-20

CD TYPE: IF-50
CD LOC: A3
MACHINE: 2921 WITH STORAGETEK INTERF'ACE
DESCRIPTION - STORAGETEK INTERFACE
PG EC LEVEL - 49444 DATE: 01/84

CARD PN

COMPo
NO.

*402042202
*402042203

:2

DESCRIPTION OF EC

EC NO.

FIEL
APL.

INITIAL RELEASE

49168

NONE

REWORK TO IF CARD.
PUT NEW CODE IN E PROMS
TO ACCOMPANY BLOWER,
RETRACTOR AND SERVO
CARD CHANGES.
CONCURRENT WITH EF49269
ENG TO UPDATE PRODUCT
TEST. ENG TO UPDATE
FIELD.
LEVEL A1.05 MICROCODE.

49275

RELEASE OF COMPATIBILITY

49291

NONE

*402042204

3

CHANGING WRITE CORRECTION
REPORTING ELIMINATING F-81
AND 'NO TRAK' PROBLEMS.
LEVEL A1.06 MICROCODE
CONCURRENT WITH EC493G1
RD CARD 402261304.

49306

NONE

*402042205

3

CHANGES SERVO ALGORYTHM
MICROCODE. LEVEL Al.07
MICROCODE.

49318

NONE

*403222201

3

INITIAL RELEASS OF XIF CARD
WHICH USES 68 PIN CMOS.

49287

NONE

*403222202

3

CHANGES MICROCODE,ADDED
DIAGNOSTICS-LEVEL 1.09. MAKE
POWER-ON RESET TRIGGER ONLY
AFTER 4 VOLTS IS REACHED.

49383

NONE

*403222203

3

CHANGE MICROCODE A1-10
LEVEL CODE. RELEASES A
MANDATORY FIELD BILL.

49423
49423A

*682~

*403222204

3

CHANGE MICROCODE A1-11 LEVEL.
RELEASES A MANDATORY FIELD BILL.
EQUIVALENT TO 403222304.

49444

*682~

PN 95523

STORAGE TECHNOLOGY CORPORATION

PAGE 3-21

CD TYPE: IF-50
CD LOC: A3
MACHINE: 2921 WITH STORAGETEK INTERFACE
DESCRIPTION - STORAGETEK INTERFACE
PG EC LEVEL - 49569 DATE: 04/84

CARD PN

. . . 11""')"')""11

...... "'Tv,J",oJV"T

COMPo

NO.

DESCRIPTION OF

3

1\L..L..L..l-\wL..

OCI t:l\ct::

i'H:

\"II

/I

"'T

- ....

I=r

I AVCOC

1-1-\ I I-I\..J

YTI:
I

/\

~

EC NO.

FIELD
APL.

/10':)01)

!l.ln!l.IC

-r;;';w;;;;J'

I'H..i1 'H..

EQUIVALENT TO 40222204.

*403222205

3

CHANGE MICRO-CODE A1-12
49477
EQUIVALENT TO 403222305. RELEASES
A MANDATORY FIB.

68352

*403222305

3

49477
CHANGE MICRO-CODE A1-12
EQUIVALENT TO 403222205. RELEASES
A MANDATORY FIB.

68352

*403222206

3

CHANGE MICROCODE Al-13
EQUIV. TO 403222306.
RELEASES MANDATORY FIB.

49543

68418

*403222306

3

CHANGE MICROCODE A1-13
EQUIV. iO 403222206.
RELEASES MANDATORY FIB.

49543

68418

*403222207

3

CHANGE MICROCODE A1-14
EQUIV. TO 403222307.
RELEASES MANDATORY FIB.

49569

68449

*403222307

3

CHANGE MICROCODE A1-14
EQUIV. TO 4U3222207.
RELEASES MANDATORY FIB.

49569

68449

PN 95523

STORAGE TECHNOLOGY CORPORATION

PAGE

3~21A

CD TYPE: IF-50
CD LOC: A3
MACHINE: 2921 WITH STORAGETEK INTERFACE
DESCRIPTION - STORAGETEK INTERFACE
PG EC LEVEL - 49649 DATE: 07/84

CARD PN

COMPo
NO.

DESCRIPTION OF EC

EC NO.

FIEL
APL.

*403222208

3

CHANGE MICROCODE A1-15
EQUIV. TO 403222308.
RELEASES MANDATORY FIB.

49576

*684

*403222308

3

CHANGE MICROCODE A1-15
EQUIV. TO 403222208.
RELEASES MANDATORY FIB.

49576

*684

*403222209

3

CHANGE MICROCODE Al-16
EQUIV. TO 403222309. RELEASES
,MANDATORY Fis.

49582

*684

*403222309

3

CHANGE MICROCODE Ai-16
EQUIV." TO 403222209. RELEASES
MANDATORY FIB.

49582

*684,

*403222210

3

REWORK DIAGNOSTICS MICROCODE
TO RETIGGER WATCHDOG T"IMER.
EQUIV. TO 403222310.

49598

*684~

*403222310

3

REWORK DIAGNOSTICS MICROCODE
TO RETIGGER WATCHDOG TIMER.
EQUIV. TO 403222210.

49598

*684~

*403222211

3

IMPROVE LOCK-OUT DETECTION
OF Z80. EQUrV. TO 403222311.
RELEASES MANDATORY FIB.

49626

*685

*403222311

3

IMPROVE LOCK-OUT DETECTION
OF Z80. EQUIV. TO 403222211.
RELEASES MANDATORY FIB.

49626

*685

*403222212

3

CHANGE M-CODE A1-17. EQUIV.
TO 403222312. MANDATORY FIB.

49649

*685:

*403222312

3

CHANGE M-CODE A1-17. EQUIV.
TO 403222212. MANDATORY FIB.

49649

*685~

PN 95523

STORAGE TECHNOLOGY CORPORATION

PAGE 3-21E

CD TYPE: IF-50
CD LOC: A3
MACHINE: 2921 WIT~ STORAGETEK INTERFACE
DESCRIPTION - STORAGETEK INTERFACE
PG EC LEVEL - 50518 DATE: 11/85

CARD PN

COMPo
NO.

DESCRIPTION OF EC

EC NO".

FIELD
APL.

*403222213

3

CHANGE M-CODE A1-18 EQUIV
TO 403222313 MANDATORY FIB.

Lf9709

*68576

*403222313

3

CHANGE M-CODE A1-18 EQUIV
TO 403222213 MANDATORY FIB.

49709

*68576

*403222214

3

CHANGE M-CODE A1-19 EQUIV
TO 4032223=14 MANDATORY FIB.

49i55

*68626

*403222314

'OJ

~

CHANGE M-CODE A1-19 EQUIV "
TO 4G3222214 MANDATORY FIB.

49755

*68626

*403222215

3

CHANGE 74S240 TO 74LS240
TO SOLVE CLOCK NOISE PROBLEM.
EQUIVALENT TO 403222315.

49806

NONE

*403222315

3

CHANGE 74S240 TO 74LS240
TO SOLVE CLOCK NOISE PROBLEM.
EQUIVALENT TO 403222215.

49806

NONE

*403222216

3

RELEASE M-CODE A220
EQUIVALENT TO 403222316.
MANDATORY FIB.

49781

*68851

*403222316

3

RELEASE M-CODE A220
EQUIVALENT TO 403222216.
MANDATORY FIB.

49781

*68851

*403222217

3

CHANGE MCODE A221. EQUIVALENT TO 403222317.
FIB RELEASED MANDATORY.

50520

*68953

*403222317

3

CHANGE MeODE A221. EQUIVALENT TO 403222217.
FIB RELEASED MANDATORY.

50520

*68953

*403222218

3

WIRE CHANGE TO HOLD START
LATCH RESET WHILE SUBSYSTEM
IS OFFLINE. EQUIVALENT TO
403222318. FIB RELEASED
EXCEPTIONAL.

50518

*68957

PN 95523

STORAGE TECHNOLOGY CORPORATION

Page 3-21C

CD TYPE: IF-50
CD LOC: A3
MACHINE: 2921 WITH STORAGETEK INTERFACE
- DESCRIPTION - STORAGETEK INTERFACE
PG EC LEVEL - 26239 DATE: 07/88

DESCRIPTION OF EC

EC NO.

FI ELI
APL.

3

WIRE CHANGE TO HOLD START
LATCH RESET WHILE SUBSYSTEM
IS OFFLINE. EQUIVALENT TO
403222218. FIB RELEASED
EXCEPTIONAL.

50518

*689~

3

FIB 68953 (MANDATORY)
COMBINED WITH FIB 68957
(EXCEPTIONAL) TO CREATE
NEW FIB 68987. NEW FIB
INCLUDES ALL CHANGES IN
PREVIOUS FIB'S. EQUIVALENT TO 403222318. FIB
RELEASED EXCEPTIONAL.

2·2577

. 6898~

EQUIVALENT TO 4032223181
418.

22811

NONE

FIB 68953 (MANDATORY)
COMBINED WITH FIB 68957
(EXCEPTIONAL) TO CREATE
NEW FIB 68987. NEW FIB
INCLUDES ALL CHANGES IN
PREVIOUS FIB'S. EQUIVALENT TO 403222218. FIB
RELEASED EXCEPTIONAL.

22577

68987

EQUIVALENT TO 4032222181
418.

22811

NONE

CARD PN

COMPo
NO.

*403222318

*403222218

*403222318

3

*403222418

3

INITIAL RELEASE OF IMBED.
EQUIVALENT TO 4032222181
318. FIB UPDATE ONLY.

22811

68963

*403222219

3

FIXES SIGNAL DEGRADATION
ON 2.5 MHZ OSCILLATOR TO
HOST IN DAISY CHAIN CONFIGURATION. EQUIVALENT
TO 403222319/419. FIB
RELEASED EXCEPTIONAL.

22948

69168

PN 95523

STORAGE TECHNOLOGY CORPORATION

Page 3-210

CD TYPE: IF-50
CD LOC: A3
MACHINE: 2921 WITH STORAGETEK INTERFACE
DESCRIPTION _. STORAGETEK INTERFACE
PG ~C LEVEL - 26239 DATE: 07/88

CARD PN -.

COMP.
NO.

*403222319

DESCR I PT ION OF EC

EC NO.

FIELD
APL.

3

FIXES SIGNAL DEGRADATION
ON 2.5 MHZ OSCILLATOR TO
HOST IN DAISY CHAIN CONFIGURATION. EQUIVALENT
TO 403222219/419. FIB
RELEASED EXCEPTIONAL.

22948

69168

*403222419

3

FIXES SIGNAL DEGRADATION
ON 2.5 MHZ OSCILLATOR TO
HOST IN DAISY CHAIN CONFIGURATION. EQUIVALENT
TO 403222219/319. FIB
69168 RELEASED EXCEPTIONAL. FIB 68963 UPDATE
ONLY.

.22948

69168
68963

403222220

3

RELEASE OF MICROCODE A222
WHICH FIXES REJECT 35
(UNABLE TO FIND BLOCK
AFTER BACK SPACE BLOCK)
AFTER WRITE OVERRUN, AND
DEPRESSION OF ON-LINE SWITCH
WILL CAUSE THE NEXT HOST
COMMAND TO BE IGNORED.
FB UPDATE ONLY, EQUIV TO
403222320 AND 403222420.

26239

69168
68987
68963

PN 95523

STORAGE TECHNOLOGY CORPORATION

Page 3-21E

~

'.

CD TYPE: IF-50
CD LOC: A3
MACHINE: 2921 WITH STORAGETEK INTERFACE
DESCRIPTION - STORAGETEK INTERFACE
PG EC LEVEL - 26239 DATE: 07/88

CARD PN
403222320

403222420

PN 95523

COMP ..
NO.
3

3

DESCRIPTION OF EC

EC NO.

RELEASE OF MICROCODE A222
WHICH FIXES REJECT 35
(UNABLE TO FIND BLOCK
AFTER BACK SPACE BLOCK)
AFTER WRITE OVERRUN, AND
DEPRESSION OF ON-LINE SWITCH
WILL CAUSE THE NEXT HOST
COMMAND TO BE IGNORED.
FB UPDATE ONLY, EQUIV TO
403222220 AND 403222420.

26239

RELEASE OF MICROCODE A222
WHICH FIXES REJECT 35
(UNABLE TO FIND BLOCK
AFTER BACK SPACE BLOCK)
AFTER WRITE OVERRUN, AND
DEPRESSION OF ON-LINE SWITCH
WILL CAUSE THE NEXT HOST
COMMAND TO BE IGNORED.
FB UPDATE ONLY, EQUIV TO
403222220 AND 403222320.

26239

STORAGE TECHNOLOGY CORPORATION

FI ELI
APL.
6916~
6898~

6896:

6916E
689B?
6896~

Page 3-21F

CD TYPE: IF-.100
CD LOC: A3
MACHINE: 2922 WITH STORAGETEK INTERFACE
DESCRIPTION - STORAGETEK INTERFACE
PG EC LEVEL - 23266 DATE: 11/86
CARD PN

COMPo
NO.

DESCRIPTION OF EC

EC NO.

FIELD
APL.

*403486201

1

INITIAL RELEASE

49653

NONE

*403486202

CHANGE PROMS TO 81.02 LEVEL.
REWORK fOR TREQ/TRAK DIAGNOSTIC TIMING.

49772

NONE

*403486203

CHANGE PROMS TO 81.03 LEVEL.
CHANGE CLOCK DRIVER CHIP

49790

NONE

*403486204

CHANGE PROMS TO 81.04 LEVEL.
WIRE SPEED CONTROL SWITCHES
DISABLE WHEN NOT BUSY.

49908

*68813

*403486205

CHANGE PROMS TO "Bl.05 LEVEL.
FIB RELEASED MANDATORY.

50521

*403486206

WIRE CHANGE TO HOLD START
LATCH RESET WHILE SUBSYSTEM
IS-OFFLINE. FIB RELEASED
EXCEPTIONAL.

22503

*68959

FIB 68951 (MANDATORY) COMBINED WITH FIB 68959 (EXCEPTIONAL) TO CREATE NEW
FIB 68991. FIB INCLUDES
ALL CHANGES IN PREVIOUS
FIB'S. FIB RELEASED AS
EXCEPTIONAL.

2257S

*68991

*403486207

CHANGE PROMS TO 81.06 LEVEL
FIB 69000 RELEASED AS EXCEPTIONAL. FIB 68965 IS UPDATE
ONLY.

22594

*69000
*68965

*403486208

FIXES SIGNAL DEGRADATION ON
2.5 MHZ OSCILLATOR TO HOST
IN DAISY CHAIN CONFIGURATION.
FIB 69168 RELEASED EXCEPTIONAL.
FIB 68965 UPDATE ONLY.

22948

69168
*68965

·23266

69199

403486209

PN 95523

CHANGE PROMS TO B1.07 LEVEL
TO IMPROVE OPERATION RELIABILITY. FIB RELEASED EXCEPTIONAL.
STORAGE TECHNOLOGY CORPORATION

*68951

*68965

Page 3-22

CD TYPE: IF-100
CD lOC: A3
MACHINE: 2922 WITH STORAGETEK INTERFACE
DESCRIPTION - STORAGETEK INTERFACE
PG EC LEVEL - 23828 DATE: 09/87
DESCRIPTION OF EC

EC NO.

FIEL
APL.

*403486209

EQUIVALENT TO 403486310.

22997

NONE

*403486310

INITIAL RELEASE OF IMBED
WITH REWORK. CHANGED TO
TRI-STATE OUTPUT BUFFERS.
EQUIVALENT TO 403486209

22997

NONE

403486210

RELEASE 8108 LEVEL MICROCODE. TO FIX LOOP OUTS AND
RUNNING OFF END OF TAPE.
F/B RELEASED EXCEPTIONAL.
EQUIVALENT TO 403486311.

23828

6932

403486311

RELEASE 8108 LEVEL MICROCODE TO FIX LOOP OUTS AND
RUNN I NG OF F END OF TAPE-.
F/8 RELEASED EXCEPTIONAL.
EQUIVALENT TO 403486210.

23828

6932

CARD PN

PN 95523

COMPo
NO.

STORAGE TECHNOLOGY

COR~ORATION

Page 3-221

CD TYPE: IF, CACHE
CD LOC: A3
MACHINE: 2925 EXCEPT SCSI INTERFACE
DESCRIPTION - CACHE BUFFER DRIVE INTERFACE
PG EC LEVEL - 26240 DATE: 02/88

CARD PN

COMPo
NO.

DESCRIPTION OF EC

EC

*403923201

1

INITIAL RELEASE TO PRODUCTION FOR CACHE BUFFER.

22602

NONE

*403923202

CACHE RESET IMPROVEMENTS
WILL NOW ALWAYS DISPLAY
VALID MACHINE CHECK CODES
AND CACHE CODE. CHANGE
MICROCODE LEVEL TO CA02.
FIB RELEASED EXCEPTIONAL.

22690

*69116

*403923203

RELEASES THE CA03 LEVEL
MICROCODE TO IMPROVE DATA
REL1ABILITY, TAPE POSITIONING AND ERROR CODE DISPLAY.
FIB RE~EASED EXCEPTIONAL.

22865

*69141

CLARIFICATION OF DESCRIPTION FOR PREVIOUS EC.

22865A

NONE

*403923204

R~LEASES THE CA04 LEVEL
MICROCODE. FIB RELEASED
EXCEPTIONAL:

23173

*69185

*403923205

RELEASES THE CA05 LEVEL
MICROCODE TO PREVENT SYSTEM
HANGS OF VARIOUS MACHINE
CHECKS. FIB RELEASED EXCEPTIONAL.

23275

*69201

EQUIVALENT TO 403923306

22997

NONE

*403923306

INITIAL RELEASE OF IMBED
WITH REWORK. CHANGED TO
TRI-STATE OUTPUT BUFFERS.
EQUIVALENT TO 403923205.

22997

NONE

*403923206

NONE BUILT FOR PRODUCTION.

23656

NONE

*403923307

NONE BUILT FOR PRODUCTION.

23656

NONE

PN 95523

STORAGE TECHNOLOGY CORPORATION

NO.

FIELD
APL.

Page 3-23

CD TYPE: IF, CACHE SCSI
CD LOC: A3
MACHINE: 2925 WITH SCSI INTERFACE
DESCRIPTION - CACHE BUFFER DRIVE INTERFACE (SCSI)
PG EC LEVEL - 26559 DATE: 09/88
COMPo
NO.

DESCRIPTION OF EC

EC NO.

FIELD
APL.

*403923207

RELEASE CA08 LEVEL MICROCODE, RUN OFF EOT, F98. ADD
FS1 AND FS2. EQUIVALENT TO
403923308. FIB RELEASED EXCEPTIONAL.

26240

*6939

*403923308

RELEASE CA08 LEVEL MICROtODE. RUN OFF EOT. F98. ADD
FS1 AND FS2. EQUIVALENT TO
403923207. FIB RELEASED EXCEPTIONAL.

26240

*6939

403923208

RELEASE CA09 LEVEL MICROCODE.
DENSITY SELECT DISABLE
OPTION AND LOAD RELIABILITY.
EQUIVALENT TO 403923309.
FIB RELEASED EXCEPTIONAL.

26559

69486

403923309

RELEASE CA09 lEVEL MICROCODE.
DENSITY SELECT DISABLE
OPTION AND LOAD RELIABILITY.
EQUIVALENT TO 403923208.
FIB RELEASED EXCEPTIONAL.

26559

69486

CARD PN

PN 95523

STORAGE TECHNOLOGY CORPORATION

Page 3-23A

CD TYPE: IF, CACHE SCSI
CD LOC: A3
MACHINE: 2925 WITH SCSi INTERFACE
DESCRIPTION - CACHE BUFFER DRUVE UNTERFACE (SCSI)
PG" EC LEVEL - 26319 DATE: 05/88

CARD PN

COMPo
NO.

DESCRIPTION OF EC

EC NO.

FIELD
APL.

*404095201

1

INITIA.L RELEASE.

23742

NONE

EQUIVALENT TO 404095301.

26319

NONE

INiTIAL RELEASE OF IF
CACHE CARD WITH LEVEL CA07
MICROCODE FOR USE IN SCSI
INtERFACE 29255.

23742

NONE

DESCRIPTION CLARIFICATION.

26319

NONE

*404095201

NOT BUILT ANYMORE. REWORK
TO 403923207. FIB RELEASED
EXCEPTIONAL.

26240

69393

*404095301

NOT BUILT ANYMORE. REWORK
TO 403"923308. F/B RELEASED
EXCEPTIONAL.

26240

69393

~404095301

PN 95523

'1
I

"STORAGE TECHNOLOGY CORPORATION

Page 3-24

CD TYPE: IFP-50
CD LOC: A3
MACHINE: 2921 WITH IND. STD. INTERFACE
DESCRIPTION - IND. STD. INTERFACE
PG EC LEVEL - 50501N DATE: 11/85
COMPo
NO.

DESCRIPTION OF EC

EC NO.

FIEL[
APL.

*403459201

INITIAL RELEASE

49650

NONE

*403459202

ADD. LATCH AND UPDATE PROMS
TO LEVEL C1.02

49763

NONE

CARD PN

*403459203

1

LENGTHEN POWER-ON RESET BY
CHANGING T!MING CAP IN CIRCUIT.

49777

NONE

*403459204

1

FIX DENSITY SELECT PROBLEM
AND FIX HANG AT BOT WITH CODE
CHANGE LEVEL C1.03.

49793

NONE

*403459205

FIXES TEST 12 AND 34C,
F99 IN DIAGNOSTICS. BUS PARITY
ERROR IN PE, PE" !D BURST LENGTH,
FEN RESET LINE, ADJUSTS SERVO
TO 50 IPS, RESETS FBY AFTER
A REWIND, CORRECTS ADDRESS
LINES, WITH CODE CHANGE
LEVEL C1.04.

49808

*686';

*403459206

WIRE CHANGE TO HANDLE
FASTER DATA IF CHANGED TO
100 IPS.

49831

*687'

*403459207

CHANGE M-CODE LEVEL
C1.05 FIXES FBT HANG HER
RESET· WITH THE RESET OF DBY,
HAND SYSTEM WHEN A RESET IS
ISSUED. HARDWARE CHANGE FOR
HER AND FBY HANG. REW UNLOAD
OFF BOT.

49937

*688~

INACTIVATE FIB'S IN EC
50501A. EC 50501N UPDATES COMPATIBILITY PAGE.

50501N

NONE

50501

*689~

*403459208

PN 95523

1

HARDWARE CHANGE TO IMPROVE
. READ/WRITE STROBE TIMINGS.
THIS.CHANGE ALLOWS A GREATER
MARGIN FOR VALID DATA ON THE
INTERFACE.
STORAGE TECHNOLOGY CORPORATION

Page 3-2:

CD TYPE: IFP-50
CD LOC: A3
MACHINE: 2921 WITH IND. ST. INTERFACE
DESCRIPTION - IND. STD. INTERFACE"
PG EC LEVEL - 26395
DATE: 06/88
COMPo
NO.

DESCRIPTION OF EC

EC NO.

FIELD
APL.

CHANGE M-CODE LEVEL TO
C1.06. IMPROVE READING
CREASED LEADERS AT BOT
(PE Tn

50529

68967

NOT UPWARD COMPATIBLE

23585

NONE

*403459310

INITIAL RELEASE OF IMBED AND
ADDITION OF PARITY GENERATOR
AND SwITCHABLE GCR SiAiUS.

23585

NONE

*403459311

CORRECT TRI-STATE BUFFER
DRIVER.

26069

NONE

403459312

CORRECT ADDRESS SWITCH
LINES. CORRECT F70 ERRORS
DUE TO LAST WORD TIMING.
FIELD BILL UPDATE

26395

68967

CARD PN
*403459209

•

PN 95523

..,

~IIQ,T\1

..,'-'.,....., I

•

STORAGE TECHNOLOGY CORPORATION

Page 3-25A

r ' -

\.-',-

CD TYPE: IFP-100
CD LaC: A3
MACHINE: 2922 WITH IND. STD. INTERFACE
DESCRIPTION - IND., STD. INTERFACE
PG EC LEVEL - 26395 DATE: 06/88

DESCRIPTION OF EC

·EC NO.

FlEU
APL.

*403595201

INITIAL RELEASE

49791

NONE

*403595202

CORRECT ADDRESS LINES:

49808

*686~

*403595203

WIRE CHANGE TO HANDLE
FASTER DATA FOR 100 IPS
INCLUDED ALL THE FIXES IN
CODE C1.04 (EC 49808)
ALLOW 100 IPS STREAMING
M-CODE LEVEL 01.02

49831

NONE

*403595204

CHANGE M-COOELEVEL
01.03 FIXES MOTOR BURN OUT,
LEAVES HARD ERROR ASSERTED
AFTER "TAPE LOST POSITION" ERROR
RESET HARD ERROR AFTER REWIND
OR BACKSPACE FILE.
EQUIVALENT TO 403595203.

49849

*687~

*403595205

CHANGE M-CODE LEVEL
01.04, FIXES F71 ERRORS
HARDWARE CHANGE TO WORK WITH
LATEST LEVEL OP CARDS FASTER
TRAK TIMING TO DP CARD BY SONS.
ADD GAP AND SPEED SELECTION VIA
SWITCH.

49869

*6876

*403595206

49938
CHANGE M-CODE LEVEL
01.05 FIXES FBY HANG, ADOS
VARIABLE ERASE AND SECURITY
ERASE AT 100IPS, HER RESET,
WITH THE RESET OF DBY, HANG
SYSTEM WHEN A RESET IS ISSUED.
HARDWARE CHANGE FOR HER AND FBY
HANG. REW UNLOAD AWAY FROM BOT.
FIELD BILL RELEASED AS MANDATORY.

*6885

CARD PN

CaMP.
NO ..

INACTIVATE F/B'S IN EC
50501A. EC 50501N UPDATES COMPATIBILITY PAGE.

PN 95523

STORAGE TECHNOLOGY CORPORATION

50501N

NONE

Page 3-26

CD TYPE: IFP-100
CD LOC: A3
MACHINE: 2922 WITH INDUSTRY STD. INTERFACE
DESCRIPTION - IND. STD. INTERFACE
PG EC LEVEL - 26395 DATE: 06/88

DESCRIPTION OF EC

EC NO.

FIELD
APL.

*403595207

HARDWARE CHANGE TO IMPROVE
READ/WRITE STROBE TIMINGS.
THIS CHANGE ALLOWS A GREATER
MARGIN FOR VALID DATA ON THE
INTERFACE.

50501

*68927

*403595208

CHANGE M-CODE LEVEL TO 01.06.
IMPROVE READING CREASED LEADERS AT BOT (PE 10 BURST).

50529

*68969

*403595209

CHANGE M-CODE LEVEL TO 01.07.
ADD NEW OPTION SWITCH, IMPROVE OPERATIONS ON INTERFACE. OPTIONS ADDED:
1. LOAD ONLINE FEATURE
2. PARITY GENERATION
3. SWITCHABLE DENSITY
STATUS LINE
4. SWITCHABLE RESET ON
A MISPOSITION

22926

*69189

EQUIVALENT TO 403595310.

23585

NONE

EQUIVALENT TO 403595311

26069

NONE

*403595310

INITIAL RELEASE OF IMBED WITH
REWORK TO THE CARD LAYOUT.
EQUIVALENT TO 403595209.

23585

NONE

*403595311

CORRECT TRI-STATE BUFFER
DRIVER. EQUVIALENT TO
403595209. FIB UPDATE ONLY.

26069

*69189

*403595210

RELEASE 0108 MICRO-CODE,
FIX F98, F05, RUN OFF EOT.
EQUIVALENT TO 403595312.
FIB RELEASED EXCEPTIONAL.

26140

69395

403595211

CORRECT ADDRESS SWITCH
LINES. CORRECT F70 ERRORS
DUE TO LAST WORD TIMING.
EQUIVALENT TO 403595313.
FIELD BILL UPDATE ONLY.

26395

69395

CARD PN

PN 95523

COMPo
NO.

STORAGE TECHNOLOGY CORPORATION

Page 3-26A

CD TYPE: . IFP-100
CD LOC: A3
MACHINE: 2922 WITH IND. STD. INTERFACE
DESCRIPTION - IND. STD. INTERFACE
PG EC LEVEL - 26395 DATE: 06/88
COMP.
NO.

DESCRIPTION OF EC

EC NO.

FIELC
APL.

*403595312

RELEASE 0108 MICRO-CODE,
FIX F98, F05, RUN OFF EOT.
EQUIVALENT TO 403595210.
F/B RELEASED EXCEPTIONAL.

26140

69395

403595313

CORRECT ADDRESS SWITCH
LINES. CORRECT F70 ERRORS
DUE TO LAST WORD TIMING.
EQUIVALENT TO 403595211.
FIELD BILL UPDATE ONLY.

26395

69395

CARD PN

PN 95523

STORAGE TECHNOLOGY CORPORATION

Page 3-268

CD TYPE: IF7.
CD LOC :
MACHINE: 2920 TAPE UNIT
DESCRIPTION:
PG EC LEVEL: 49978 DATE: 10/85

CARD PN
*403860201

PN 95523

COMPo
NO.

NO.

DESCRIPTION OF EC

EC

DELAY OF 15 MSEC BEFORE
INITIATION OF DATA PREFETCH ON ALL 50 IPS
WRITES/LWR. REPLACING
PROM #2 WITH RPQ CHANGE.

49978

STORAGE TECHNOLOGY CORPORATION

FIELD
APL.
NONE

Page 3-27

(

" CD TYPE:" IFP-DC
CD LOC: A3
MACHINE: 2920 TAPE UNIT
DESCRIPTION:DC- 48 VOLT INTERFACE
PG EC LEVEL: 2~140 DATE: 02/88
""

.. .,

CARD PN

NO.

DESCRIPTION OF EC

EC NO.

FIEL
APL.

*404152201

1

INITIAL RELEASE

23969

NONE

CORRECT TRI-SiATE BUFFER
DRIVER.

26069

NONE

INITIAL RELEASE OF SiRUCTURE.

26055

NONE

~UI'It' •

*404152202

*404152203

1

RELEASE 0208 MICRO-CODE.

26044

NONE

404152204

1

RELEASE D108 MICRO-CODE,
FIX F98, F05, RUN OFF EDT.'
FIB RELEASED EXCEPTIONAL.

26140

6939

PN 95523

STORAGE TECHNOLOGY CORPORATION

Page

3-2~

CD TYPE: KK
LOC: OP PANEL
MACHINE: 2920 TAPE UNIT
DESCRIPTION - OP PANEL
PG EC LEVEL - 49810 DATE: 06/85

CD

CARD' PN

COMPo

NO.

*402051301

DESCRIPTION OF EC
... &1 T

~

T

... 1

11'11 i lAL

,..,,... I

r-

A ,.. ....

tH:Lt:.P.~i:

FIELD

EC NO.

APL.

II"''''''''''''

NONE

q~\).:jl

TO ENGINEERING.
RELEASE OF COMPATIBILITY

49291

*402051302

1

CORRECT MOUNTING HOLE POSITION

49630

NONE

*402051402.

1

CHANGE ARTWORK TO NEW
HOLE LOCATIONS.

49657M

NONE

402051303

CHANGE J35 CONNECTOR
TO POLARIZED CONNECTOR.

49810

NONE

402051403

CHANGE J~~
........ CONNECTOR
iO POLARIZED CONNECTOR.

43810

NONE

PN 95523

STORAGE TECHNOLOGY CORPORATION

PAGE 3-29

CD TYPE: NK
CD LOC: POWER SUPPLY
MACHINE: 2920 TAPE UNIT
DESCRIPTION - VOLTAGE REGULATOR
PG EC LEVEL - 22917 DATE: 07/86

CARD PN

COMP.
NO.

DESCRIPTION OF EC

EC NO.

FIEL
APL.

*402213301

1

DARLINGTON DR X5TR-INT CONFIG

49223

NONE

*402213302

1

CHANGED TRANSISTOR FROM
TIP120 TO D44H11 S\I! I TCH I NG
XSTR INITIAL RELEASE.

49223

NONE

RELEASE OF COMPATIBILITY

49291

NONE

CHANGED FILM TO PLACE
FEED THROUGH PADS ON HOLES
1-5 ON COMPONENT SIDE. INITIAL
RELEASE.

49414

NONE

"402213303

"INCREASED LENGiH OF CABLE
FROM NK TO AK CARD. EQUIVALENT TO 402213403.

22917

NONE

402213403

INCREASED LENGTH OF CABLE
FROM NK TO AK CARD. EQUIVALENT TO 402213303.

22917

NONE

*402213402

PN 95523

STORAGE TECHNOLOGY CORPORATION

PAGE 3-3(

CD TYPE:
CD LOC:

MACHINE:

PK
POWER SUPPLY

2921, 2922, 2925

DESCRIPTION - SHORT CIRCUIT DETECT
PG EC LEVEL - 49985 DATE: 10/85

CARD PN

COMPo
NO.

*402055304

1

*402055305

1

*402055306

,..,

*402055307

,L

402055308

2

DESCRIPTION OF EC
,..,,..1 ,.. A"''''' T,...

EC NO.

FIELD
APL.

IU t:.1'HJ 11'1-

~::1~4f1

nnniO ..

NONE

RELEASE OF COMPATIBILITY.

49291

NONE

TIMING CONSTANT C4 INCREASED.
GAIN CHANGED AND TRANSFORMER
NOTES CLARIFIED. MAGNETIC
SHIELD ADDED TO DIP RELAY
TO PREVENT OPERATION DUE TO
TRANSFORMER LEAKAGE FLUX.

49255

NONE

MOUNTING HOLES CHANGED TO
SLOTTED HOLES TO ALLOW
EASIER MOUNTING TO TRANS-"
FORMER.

49368

NONE

CUT TRACE RUNNING UNDER TBi
ON PK CARD. TRACE IS CUT
IN 5 PLACES TO ELIMINATE
ALL POSSIBLE SHORT CIRCUITS.
REWORK WIRE IS ADDED TO RESTORE ORIGINAL CONNECTION.

49545

68416

ADDING A CAPACITOR TO FORCE
CB TO TRIP WHEN FERRO CAP
WINDING IS SHORTED: REPLACING READ REPLAY WITH
MECHANICAL RELAY TO IMPROVE
IMMUNITY TO STRAY FIELDS FROM
TRANSFORMER. EQUIVALENT TO

49195

NONE

EQUIVALENT TO 402055409/509.

49985

NONE

ADDING A CAPACliOR TO FORCE
CB TO TRIP WHEN FERRO CAP
WINDING IS SHORTED: REPLACING READ REPLAY WITH
MECHANICAL RELAY TO IMPROVE
IMMUNITY TO STRAY FIELDS FROM
TRANSFORMER.

49195

NONE

INliIAL
EERING.

t\t.LI:.A~t:.

,... ... ,.. T "I

402055409.

*402055408

PN 95523

2

STORAGE TECHNOLOGY CORPORATION

PAGE 3-31

(.; ..
\

'

..

CD TYPE: PK
CD LOC: POWER SUPPLY
MACHINE: 2921, 2922, 2925
DESCRIPTION - SHORT CIRCUIT DETECT
PG EC LEVEL - 49985 DATE: 10/85

CARD PN .
402055409

402055509

PN 95523

COMPo
NO.
2

2

DESCRIPTION OF EC

EC NO.

FIEL
APL.

ELIMINATE FALSE TRIP BY ADDING
DIODE ( CR 12) . REMOVES RACE
CONDITION BY REVERSING SENSE
OF OUTPUT RELAY. EQUIVALENT
TO 402055308.

49818

6867

EQUIVALENT TO

49985

NONE

49985

NONE

402055~08/509.

RELEASE OF IMBED. EQUIVALENT TO 402055308/409.

STORAGE TECHNOLOGY CORPORATION

PAGE

3-31~

CD TYPE: RD-50
CD LOC: A6
MACHINE: 2921
DESCRIPTION
READ CARD
PG EC LEVEL - 49923 DATE: 06/85

COMPo

CARD PN

NO.

EC NO.

INITIAL RELEASE
TO ENGINEERING

*402261303

*402261304

DESCRIPTION OF EC

2

FIELD
AP-L.

NONE

RELEASE OF COMPATIBILITY

49291"

REDUCE WRITE AMP SENSE
THRESH"ID
Tn
1~~
I
reRnM
UIII 2~%
..;
IV
IwflJ.
CONCURRENT WITH EC40306
IF CARD 402042204.

49301

NONE

ALLOWS REAR CABLE TO BE LOCKED.

49422

NONE

1.)1...

*402261305

.2

*402261306

2

ENABLES READ CABLE TO BE
LOCKED IO RD CARD. CONCURRENT
WITH EC 49389A, FIB 68340.

49499

68338

*402261307

2

DELETE 10UF CAP(C31)
FROM-SV REGULATOR CIRCUIT.

49769

NONE

402261308

2

CHANGE veo GAIN DURING
DATA AND LOWER VR MINIMuM
THRESHOLD IN WRITE MODE.
CHANGE PLL FILTER VALUES TO
INCREASE BAND WIDTH. FIELD
BILL RELEASED AS EXCEPTIONAL.

49923

68837

PN 95523

STORAGE TECHNOLOGY CORPORATION

PAGE 3-32

CD TYPE: RD-100
CD LOC: A6
MACHINE: 2922, 2925
DESCRIPTION - READ CARD
PG EC LEVEL - 49981 DATE: 12/85

CARD PN

COMPo
Nru.

*403504201

DESCRIPTION OF EC

EC NO.

FIEL
APL.

INITIAL RELEASE OF
RD 100 IPS CARD.

49692

NONE

*403504202

1

CORRECT 100 IPS PE ANALOG
SIGNAL DISTORTIUON BY GAIN
ADJUSTMENT.

49882

*587

403504203

1

REDUCE AMP ·SENSE MINIMUM
49936
VOLTAGE IN WRITE FOR LOW
OUTPUT SIGNAL TAPES. CHANGE
HIGH GAIN CURRENT AND PLL
FILTER VALVES IMPROVES VELOCITY TRACKING CAPABILITY IN GeR.
FUNCTIONALLY EQUIVALENi TO
403504202. FIELD BILL RELEASED AS EXCEPTIONAL.

6883

EQUIVALENT TO 403504303.

49981

6883

IMBED REWORK AND ELIMINATE
GAIN RESISTOR SELECTION.
CHANGE BUFFER AMP GAIN,
BANDPASS GAIN AND BANDPASS FILTER CONFIGURATION.
EQUIVALENT TO 403504203.

49981

6883

403504303

PN 95523

STORAGE TECHNOLOGY CORPORATION

PAGE 3-3:

--

CD ry.PE: SV
CD LOC: A1
MACHINE: 2921, 2922, 2925
DESCRIPTION - SERVO CARD
PG EC LEVEL - 49863 DATE: 01/85

CARD PN

COMP.

NC.

*402239203

FIELD
APL.

DESCRIPTION OF EC

EC

INITIAL RELEASE

NONE

RELEASE OF COMPATIBILITY

49227
49387
49291

NO.

*402239307

1

RELEASE OF 300 LEVEL

49269

NONE

*402239308

1

ADD RESISTOR TO EPO DRIVER
THRESHOLD.

49336

NONE

*402239309

2

ADD "DOOR AJAR" INTERLOCK
CIRCUITRY. MACHINES WITHOUT
INTERLOCK SWITCH MUST HAVE
MOTHERBOARD JUMPER tB02 TO
A02) INSTALLED.

49250
49250A

NONE

DISABLE BOTH REEL MOTOR
DRIVERS WHEN REELS SHOULD
BE STILL.
COMPATIBILITY NUMBER ROLLED
BACK. NO COMPATIBILITY
BREAK.

49510

-68437

49863

NONE

TRIM FILE REEL DAC OFFSEl
VOLTAGE.
COMPATIBILITY NUMBER ROLLED
BACK. NO COMPATIBILITY
BREAK.

49658

NONE

49863

NONE

ALLOWS EVEN EXTREME VALVES
AT FILE REEL DAC OFFSET
VOLTAGE TO BE TRIMMED,
IMPROVING FILE REEL SPEED
DRIVING LOAD.
COMPATIBILITY NUMBER ROLLED
BACK. NO COMPATIBILITY
BREAK.

49770

NONE

49863

NONE

RELEASE OF 400 LEVEL EMBED
OF 300 LEVEL. EQUIVALENT
TO 402239312.
COMPATIBILITY NUMBER ROLLED
BACK. NO COMPATIBILITY
BREAK.

49715

NONE

49863

NONE

*402239310

*402239311

*402239312

*402239413

PN 95523

2

2

2

2

STORAGE TECHNOLOGY CORPORATION

68360

PAGE 3-34

CD TYPE: SV
CD LOC: Al
MACHINE: 2921,2922, 2925
DESCRIPTION - SERVO CARD
PG EC LEVEL - 26319 DATE: 05/88

CARD PN

COMPo
NO.

DESCRIPTION OF EC

EC NO.

FIEL
APL.

*402239313

~

'1

INCREASE GAIN OF AMPLIFIER
TO HANDLE INERTIA AT EDT,
EQUIVALENT TO 402239414.

49925

*688

*402239414

2

INCREASE GAIN OF AMPLIFIER
iO HANDLE INERTIA AT EDT,
EQUIVALENT TQ 402239313.

49925

*68E

2925 TAPE UNITS REQUIRE
LEVEL 402239314 OR ABOVE.
2921 AND 2922 MAY USE

26319

NONE

LOWER LEVEL.

*402239.314

2.

CHANGES MADE TO MAINTAIN
COMMONAL!TY BETWEEN CACH~
BUFFER AND STANDARD 2920
PRODUCTS. EQUI VALENT TO
402239415. FIB UPDATE ONLY.

22528

*68E

*402239415

2

CHANGES MADE TO MAINTAIN
COMMONALITY BETWEEN CACHE
BUFFER AND STANDARD 2920
PRODUCTS. EQUIVALENT TO
402239314. F/B UPDATE ONLY.

22528

~68E

*402239315

2

APPLY THERMAL COMPOUND TO
017 AND Q30. CHANGE 2
RESISTORS. EQUIVALENT
TO 402239416.

22648

NONE

*402239416

2

APPLY THERMAL COMPOUND TO
AND Q30. CHANGE 2
RESISTORS. EQUIVALENT
TO 402239315.

22648

NONE

Q17

PN 95523

STORAGE TECHNOLOGY CORPORATION

Page 3-34

CD TYPE: SV
CD LOC: Ai
MACHINE: 2921, 2922, 2925
DESCRIPTION - SERVO CONTROL
PG EC LEVEL - 23769 DATE: 01/8~

COMPo
NO.

CARD PN
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