Apple 7100 66 Users Manual
7100/80AV 545aea2f-bcee-4169-8efc-a71258476279
710066 to the manual 545aea2f-bcee-4169-8efc-a71258476279
2015-02-02
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Basics Power Macintosh System Overview - 1
Power Macintosh System Overview
PowerPC microprocessors are a family of processors built
on reduced instruction-set computing (RISC) technology.
RISC processors streamline the internal workings of
computers. Whereas traditional (complex instruction-set
computing, or CISC) processors contain a wide variety of
instructions to handle many different tasks, RISC
processors contain only those instructions that are used
most often. When a complex instruction is needed, a RISC
processor builds it from a combination of basic instructions.
RISC processors are designed to execute these basic
instructions extremely quickly. The performance gains
achieved by speeding up the most-used instructions more
than compensate for the time spent creating less-used
instructions.
Basics Power Macintosh System Overview - 2
Previously, RISC technology had been used only in high-end
workstations and commercial database servers. With the
introduction of Macintosh PowerPC computers, Apple
succeeded in bringing RISC technology to personal
computing.
Key Points
Three key points to remember about a PowerPC processor-
based Macintosh system: It's a Macintosh; it's compatible; it
offers tremendous performance.
Apple's PowerPC computers feature the same user interface
as their 680x0-based predecessors. Users can mix RISC-
based and 680x0-based Macintosh systems on the same net-
work and exchange files and disks between them. In addition,
users can run both 680x0 and native PowerPC applications
on the same Power Macintosh system simultaneously.
Basics Power Macintosh System Overview - 3
Compatibility is not limited just to applications. INITs,
CDEVs, drivers, and other Macintosh utility software also
work on PowerPC processor-based Macintosh systems. So do
AppleTalk devices (such as printers), SCSI devices (such as
hard drives and scanners), ADB devices (such as mice,
trackballs, and keyboards), and other Macintosh cards and
peripherals.
The primary operating system for PowerPC processor-
based Macintosh computers is System 7. The operating
system has been optimized for the highest performance on
the PowerPC processor. This optimization of System 7
benefits applications written for 680x0 systems as well as
those developed specifically for PowerPC processor-based
systems.
And while PowerPC-based Macintosh systems running
native applications offer two to four times the performance
Basics Power Macintosh System Overview - 4
of the fastest 68040- and 80486-based personal
computers, the real promise of PowerPC technology is that
it enables Apple and other developers to deliver new
software capabilities on Macintosh systems that were
previously available only on high-end workstations.
Troubleshooting Tips
When troubleshooting Power Macintosh systems, keep in
mind the following:
1 If a Power Macintosh system does not power up, you
should first attempt to reset the logic board. Instruc-
tions are provided in the Additional Procedures chapter.
2 With Power Macintosh computers, you must install
noncomposite RAM SIMMs only, and the RAM SIMMs
must be installed in like pairs (that is, the same size and
speed). Additional troubleshooting information is
Basics Power Macintosh System Overview - 5
provided in the Symptom Charts section of the
Troubleshooting chapter under the “System” topic
heading.
3 If a Power Macintosh system has bad RAM SIMMs
installed, you will not hear death chimes. Instead, a
dialog box will appear alerting you to the fact that a bad
RAM SIMM has been detected. Additional troubleshooting
information is provided in the Symptom Charts section
of the Troubleshooting chapter under the “System” topic
heading.
4 If the system hangs shortly after installing a new NuBus
card, contact the vendor to verify that the card is
compatible with the Power Macintosh system or to see if
there is a software upgrade available. If the NuBus card
is an Apple manufactured product, refer to the Service
Tech Info Library for more information.
Basics Power Macintosh System Overview - 6
5 The Power Macintosh AV systems use the same logic
board as the non-AV versions. The only difference is that
the AV versions have the Power Macintosh AV Card
installed in the PDS slot.
The Power Macintosh 7100/66 and 7100/80 systems
must
have a video card installed in the PDS slot. These
systems use the Power Macintosh 2 MB Video Card. A
missing card can result in a system that won't boot or a
system that crashes.
Basics Rear Panel Connectors - 13
Rear Panel Connectors
The figure on the following page shows the rear panel of a
Power Macintosh 7100 computer with a 2 MB Video Card
installed. The AV version of the Power Macintosh 7100
would have a Power Macintosh AV Card installed instead of
the 2 MB Video Card. In addition to a DB-15 connector, the
AV Card includes an S-Video Input and an S-video Output
port.
Specifications Processor - 1
Processor
CPU
Built-in MMU and FPU
32K of on-chip cache memory
7100/66:
66 MHz PowerPC 601 RISC microprocessor
Requires system software version 7.1.2 or later
7100/80:
80 MHz PowerPC 601 RISC microprocessor
Requires system software version 7.5 or later
Note
: To run System 7.5 on the Power Mac 7100/80, you must
install enabler version 1.1.1 or later. This version of the
system software, which ships with the unit, requires Finder
version 7.1.5. You can verify that you have the correct Finder
version installed by using the “Get Info” command.
Specifications Memory - 2
Memory
RAM
8 MB RAM soldered on logic board, expandable to 136 MB via 4
SIMM sockets on logic board (using pairs of same size, 80 ns
or faster, 72-pin noncomposite SIMMs); 16 MB configuration
has two 4 MB SIMMs installed
Note
: SIMMs must be installed in pairs of the same size and
speed. Install noncomposite SIMMS only.
ROM
4 MB installed on SIMM socket
Specifications Memory - 3
VRAM
7100/66 & 7100/80:
1 MB, expandable to 2 MB using four 256K VRAM SIMMs
7100/66AV &
2 MB
7100/80AV:
Cache
7100/66:
32K of on-chip cache; optional 256K level 2 cache available
7100/80:
32K of on-chip cache; 256K level 2 cache standard
Clock/calendar
CMOS custom chip with long-life lithium battery
Specifications Disk Storage - 4
Disk Storage
Hard Drive
7100/66:
250 MB or 500 MB hard drive
7100/80:
500 MB or 700 MB hard drive
CD-ROM
7100/66:
Optional internal CD-ROM drive
7100/66AV:
Internal AppleCD 300i Plus CD-ROM drive
7100/80 & 7100/
80AV:
Internal AppleCD 300i Plus CD-ROM drive standard on some
models and optional on others
Specifications I/O Interfaces - 6
I/O Interfaces
SCSI
One SCSI port; DB-25 connector
Supports a maximum of six external devices (five when internal
CD-ROM is installed)
Serial
Two RS-232/RS-422 LocalTalk/GeoPort serial ports; mini DIN-
9 connectors (backward compatible with mini DIN-8
connectors)
Apple Desktop Bus
One Apple Desktop Bus (ADB) port; mini-Din-4 connector
Maximum power draw 500 mA; maximum of three devices total
Ethernet
One built-in AUUI-15 Ethernet port
Specifications I/O Interfaces - 7
Expansion Slot
One processor-direct slot (PDS); 182-pin connector
NuBus
Three NuBus slots support standard size cards; 96-pin Euro-DIN
connectors
Sound
16-bit stereo in and out
Sample rates of 48, 44.1, 24, and 22.05 kHz
Input/output line level: 1 V peak-to-peak
Input/output signal-to-noise ratio (SNR): 82 dB with no audible
discrete tones
Bandwidth: 20 Hz–20 kHz (± 2 dB) at 44.100 kHz sample rate
THD+N (total harmonic distortion plus noise): less than 0.05%,
measured 20Hz–20 kHz with a 1-Vrms sine wave input
Specifications I/O Interfaces - 8
Video
One HDI-45 DRAM-based video port on logic board supports
direct connection to Apple AudioVision monitors and with
optional HDI-45 to DB-15 adapter supports 12", 13", 14",
15" portrait, 16", and 17" monitors
7100/66 & 7100/80:
Also has a Power Macintosh 2 MB Video Card with one DB-15
VRAM-based video port that supports 12", 13", 14", 15"
portrait, 16", and 17", 20", and 21" monitors
7100/66AV & 7100/
80AV:
Also has a Power Macintosh AV Card with the following: one DB-
15 VRAM-based video port that supports 12", 13", 14", 15"
portrait, 16", and 17", 20", and 21" monitors; one S-video/
composite input port; and one S-video composite output port
Note
: Only one monitor can be attached to the card at one time
(that is, either through the DB-15 port or the S-video port).
Specifications I/O Devices - 9
I/O Devices
Keyboard
Standard, extended, or adjustable keyboard
Keyboard draws 25–80 mA, depending on model of keyboard
Mouse
ADB Mouse II; Draws up to 10 mA
Microphone
7100/66:
Optional Apple PlainTalk microphone; unidirectional and
optimized for use with speech recognition
7100/66AV, 7100/80
& 7100/80AV:
Apple PlainTalk microphone standard
Specifications Video Display - 10
Video Display
Video Support
System must have the Power Macintosh 2 MB Video Card or Power
Macintosh AV Card installed
All Power Macintosh 7100 series computers support
monochrome, color, VGA, and SVGA formats on the HDI-45
logic board connector, including:
• Macintosh 12" Monochrome Display (640 x 480)
• Macintosh 12" RGB Display (512 x 384)
• AppleColor High-Res RGB 14" Monitor (640 x 480)
• Apple AudioVision 14 Display (640 x 480)
• Macintosh Color Display (640 x 480)
• Macintosh 15" Portrait Display (640 x 870)
• Macintosh 16" Color Display (832 x 624)
Specifications Video Display - 11
Video Support
(continued)
All Power Macintosh 7100 series computers also support the
following monitors via the DB-15 connector on their
respective video cards:
• Macintosh 19" Color Display (1024 x 768)
• Apple Multiple Scan 20 Display (1280 x 1024)
• Macintosh 21" Color Display (1152 x 870)
And the AV versions support the following monitors via the DB-15
connector on the Power Macintosh AV Card:
• NTSC (512 x 384 and 640 x 480)
• PAL (640 x 480 and 768 x 576)
Troubleshooting General/ - 1
General
The Symptom Charts included in this chapter will help you
diagnose specific symptoms related to your product. Because cures
are listed on the charts in the order of most likely solution, try
the first cure first. Verify whether or not the product continues to
exhibit the symptom. If the symptom persists, try the next cure.
(Note: If you have replaced a module, reinstall the original module
before you proceed to the next cure.)
If you are not sure what the problem is, or if the Symptom Charts
do not resolve the problem, refer to the Flowchart for the product
family.
For additional assistance, contact Apple Technical Support.
Troubleshooting Symptom Charts/Error Chords - 3
Error Chords
One-part error
chord sounds during
startup sequence
1 Disconnect hard drive power cable and hard drive data cable.
Reboot system. If startup sequence is normal, run Macintosh
Hard Disk test and replace hard drive if necessary.
2 Disconnect floppy drive cable and reboot system. If startup
sequence is normal, replace floppy drive.
3 Replace logic board. Retain customer’s SIMMs.
Troubleshooting Symptom Charts/System - 4
System
Does not power on;
screen is black, fan is
not running and LED
is not lit
1 Check cables.
2 Plug monitor directly into wall socket, and verify that
monitor has power.
3 Reset logic board. (Refer to Additional Procedures.)
4 Reseat ROM SIMM and cache SIMM.
5 Replace power cord.
6 Replace power supply.
7 Replace logic board.
Clicking, chirping or
thumping
1 Replace power supply.
2 Replace logic board. Retain customer’s SIMMs.
Troubleshooting Symptom Charts/System
(Continued)
- 5
System
(Continued)
System shuts down
intermittently
1 Check that air vents are clear. Thermal protection circuitry
may shut down system. After 30 to 40 minutes, system
should be OK.
2 Replace power cord.
3 Check batteries. Refer to "Battery Verification" in Additional
Procedures.
4 Replace power supply.
5 Replace logic board. Retain customer’s SIMMs.
Troubleshooting Symptom Charts/System
(Continued)
- 6
System
(Continued)
System
intermittently
crashes or locks up
1 Verify that system software is version 7.1.2 or later.
2 Verify SIMMs are noncomposite and installed in like pairs
(same size/speed).
3 Verify that software is known-good.
4 Verify that software is Power Macintosh compatible (contact
developer).
5 Verify that a video card is installed in the PDS slot.
6 Clear parameter RAM. Hold down <Command> <Option> <P>
<R> during startup but before "Welcome to Macintosh"
appears.
7 Replace cache SIMM (if installed).
8 Replace DRAM SIMMs. Refer to Memory manual.
9 Replace power supply.
10 Replace logic board. Retain SIMMs.
Troubleshooting Symptom Charts/Video - 7
Video
Screen is dark, audio
and at least one drive
operate, fan is
running, and LED is
lit
1 Adjust brightness on monitor.
2 Replace video cable.
3 Try using known-good RAM SIMMs.
4 If monitor is attached to DB-15 connector, attach monitor to
HDI-45 connector. If problem goes away, verify VRAM
SIMMs on video card are good. If SIMMs are bad, replace
them. If SIMMs are good, replace video card.
5 Replace monitor. Refer to appropriate monitor manual to
troubleshoot defective monitor.
6 Replace logic board. Retain customer’s SIMMs.
Troubleshooting Symptom Charts/Video
(Continued)
- 8
Video
(Continued)
Screen is dark, audio
and drive do not
operate, fan is
running, and LED is
lit
1 Remove peripherals.
2 Remove NuBus cards.
3 Replace DRAM SIMMs
4 Replace VRAM SIMMs.
5 Replace video card.
6 Replace power supply.
7 Replace logic board.
Partial or whole
screen is bright and
audio is present, but
no video information
is visible
1 Replace video cable.
2 Replace VRAM SIMMs.
3 Replace video card.
4 Replace monitor. Refer to appropriate monitor manual to
troubleshoot defective monitor.
5 Replace logic board. Retain customer’s SIMMs.
Troubleshooting Symptom Charts/Video
(Continued)
- 9
Video
(Continued)
Screen is completely
dark, fan is not
running, and LED is
not lit
1 Verify that external power cables are properly connected.
2 Reset logic board. (Refer to Additional Procedures.)
3 Remove peripherals.
4 Remove NuBus cards.
5 Replace power supply.
6 Replace logic board. Retain customer’s SIMMs.
Multiple Scan
monitor attached to
Power Macintosh
7100/66AV displays
ghosting or video
smearing
Replace Power Macintosh AV Card.
Troubleshooting Symptom Charts/Floppy Drive - 10
Floppy Drive
Audio and video are
present, but internal
floppy drive does not
operate
1 Replace internal floppy drive cable.
2 Replace internal floppy drive.
3 Replace logic board. Retain customer’s SIMMs.
Floppy disk ejects,
and display shows Mac
icon with blinking
“X”
1 Try a different floppy disk.
2 Replace floppy drive cable.
3 Replace internal floppy drive.
4 Replace logic board. Retain customer’s SIMMs.
Floppy disk does not
eject
1 Switch off system and hold mouse button down while
switching on.
2 Eject disk manually.
3 Replace floppy drive cable.
4 Replace floppy drive.
Troubleshooting Symptom Charts/Hard Drive - 12
Hard Drive
Internal hard drive
runs continuously
1 Update driver software of hard drive using HD-SC Setup.
2 Reinstall system software.
3 Replace SCSI data cable.
4 Replace internal hard drive.
5 Replace logic board. Retain customer’s SIMMs.
Internal hard drive
does not operate
1 Replace SCSI data cable.
2 Replace SCSI power cable.
3 Replace hard drive.
4 Replace logic board. Retain customer’s SIMMs.
Troubleshooting Symptom Charts/CD-ROM Drive - 13
CD-ROM Drive
CD-ROM drive does
not accept a compact
disc
1 Exchange disk (if disk is dirty or damaged).
2 Replace CD-ROM drive mechanism.
Macintosh does not
display CD-ROM
drive icon
1 Verify that CD-ROM extension is in System Folder.
2 Replace CD-ROM drive mechanism.
3 Replace SCSI data cable.
Compact disc won’t
eject from the drive
1 Turn off file sharing in Sharing Setup Control Panel.
2 Manually eject the compact disc.
3 Press the eject button behind the front bezel (if it is
accessible).
4 Replace the CD-ROM drive mechanism.
Troubleshooting Symptom Charts/Peripheral - 14
Peripheral
Works with internal
or external SCSI
device, but does not
work with both
1 Replace external SCSI cables.
2 Verify that there is only one terminator on external devices.
3 Verify that SCSI select switch on any external device is set
differently from any internal SCSI device.
4 Verify that the hard drive is terminated and the CD-ROM
drive is not terminated.
5 Replace the terminator on external SCSI device.
6 Replace the SCSI select cable on external SCSI device.
Troubleshooting Symptom Charts/Peripheral
(Continued)
- 15
Peripheral
(Continued)
Cursor does not move 1 Reboot computer.
2 Verify that mouse is connected properly.
3 If mouse was connected to keyboard, connect mouse to
computer ADB port instead. If mouse works, replace
keyboard.
4 If mouse does not work in any ADB port on computer, replace
mouse.
5 Replace logic board. Retain customer’s SIMMs.
Cursor moves, but
clicking the mouse
button has no effect
1 Replace mouse.
2 Replace logic board. Retain customer’s SIMMs.
3 If mouse was connected to keyboard, connect mouse to
computer ADB port instead. If mouse works, replace
keyboard.
Troubleshooting Symptom Charts/Peripheral
(Continued)
- 16
Peripheral
(Continued)
Double-click does not
open application,
disk, or server
1 Remove duplicate system files from hard drive.
2 Clear parameter RAM. Hold down <Command> <Option> <P>
<R> during startup but before "Welcome to Macintosh"
appears.
3 If mouse was connected to keyboard, connect mouse to
computer ADB port instead. If mouse works, replace
keyboard.
4 If mouse does not work in any ADB port on computer, replace
mouse.
5 Replace logic board. Retain customer’s SIMMs.
No response to any
key on the keyboard
1 Verify that keyboard is connected to ADB port.
2 Replace keyboard cable.
3 Replace keyboard.
4 Replace logic board. Retain customer’s SIMMs.
Troubleshooting Symptom Charts/Miscellaneous - 17
Miscellaneous
About This Macintosh
reports more system
memory than is
installed
1 Verify that RAM SIMMs are installed in matching pairs
(same size and speed).
2 Replace RAM SIMMs.
About This Macintosh
reports less system
memory than is
installed
1 Verify that RAM SIMMs are installed in matching pairs
(same size and speed).
2 Replace RAM SIMMs.
Take Apart Top Cover - 1
Top Cover
No preliminary steps are
required before you begin
this procedure.
1 Gently loosen the
captive screw.
Note
: Do not force the
screw.
2 Slide the top housing
toward the front 1 inch.
Lift the top housing
straight up.
Caution
: Do not attempt
to tilt the top housing
when you remove it.
Top
Housing
EMI
Gasket
Captive
Screw
Take Apart Power Supply - 5
2 If there is a power
supply strap installed on
the unit, squeeze on the
two ends of the strap and
push it through the
metal opening to remove
it.
Note
: The power supply
strap is part of the
shipping packaging for
some power supplies.
When replacing the
power supply you
should replace the strap
if present.
Take Apart Power Supply - 6
3 Remove the power
supply screw from the
rear panel.
4 Pry the latch away from
the base of the power
supply.
5 Grasp the power supply
and firmly lift it out of
the drive mount chassis.
Note
: The firm lifting
motion disconnects the
power supply’s
connector from the logic
board.
Power Supply
Screw Rear Panel Power Supply
Latch
Take Apart Video Card - 25
1
Caution
: Pull up evenly
on both sides of the video
card to avoid bending the
connector pins, and
remove the card from
the expansion slot.
Replacement Caution
:
When replacing the card,
do not force it into the
expansion slot. If the
card does not seat
properly, remove it and
try again.
Take Apart Fan - 28
3
Caution
: When remov-
ing the fan, be careful
that you don’t knock the
heat sink or damage the
DRAM chips on the logic
board.
Grasp the fan and gently
pull down and out on the
fan to release it from the
metal drive chassis.
Note
: The fan bracket has
five plastic tabs un-
derneath that attach to a
metal slot in the drive
chassis. You may need to
wiggle the fan slightly
to release the tabs.
Metal Drive
Chassis
Tab
Tab Tab
Tab
Tab
Fan Bracket
Underneath Side
DRAM
Chips
Fan
Heat
Sink
Take Apart Fan - 29
Replacement Caution
: When
replacing the fan, be
careful that you don’t knock
the heat sink or damage the
DRAM chips on the logic
board.
4 The fan bracket has five
plastic tabs on its
underneath side that are
used to attach the fan to
the metal drive chassis.
To replace the fan,
insert the main plastic
tab in the middle of the
bracket into the second
metal slot from the right
on the drive chassis.
Tab
Tab
Tab
Tab
Main Tab
Fan Bracket
Underneath Side
Metal Drive
Chassis
Second
Slot
Take Apart Speaker - 32
1 Disconnect the speaker
cable from the logic
board.
2 Remove the speaker
mounting screws and
pull out the speaker.
Note
: There is more than one
version of speaker for the
computer. Speakers install
with four or two screws,
depending on the version.
Speaker
Logic Board
Speaker
Cable
Take Apart Logic Board - 34
1 Remove the customer’s RAM SIMMs and 256K cache
SIMM before returning the logic board to Apple.
Note
: Grasp the cache SIMM by its corners and pull up
firmly to remove it.
Note
: The connectors for the cache and ROM SIMMs are
functionally the same, and the ROM and 256K cache
SIMMs may be installed in either connector. Be sure you
remove the cache SIMM and not the ROM SIMM. The
256K cache SIMM has five chips on each side.
Take Apart Logic Board - 36
Replacement Note
: Remove
the customer’s SIMMs from
the defective logic board and
install them on the
replacement logic board.
Replacement Note:
Position
the center rear edge of the
logic board in the plastic
bracket and slide the board
straight back.
Logic Board
Logic Board
Upgrades Expansion Cards - 1
Expansion Cards
Before you begin, remove
the top housing.
Caution
: Review the ESD
precautions in Bulletins/
Safety.
Note:
The Power Macintosh
7100/66 must have the
Power Macintosh 2 MB Video
Card installed in its PDS
slot. The Power Macintosh
7100/66AV must have the
Power Macintosh AV Card
installed in its PDS slot.
Caution:
Pull up evenly
PDS
NuBus Slots
Upgrades Power Macintosh Upgrade - 10
Note:
The Power Macintosh
7100/66 Upgrade Kit for
the Centris 650 or
Macintosh Quadra 650
includes a Power Macintosh
7100/66 logic board, top
housing, bottom chassis, 1.4
MB manual insert floppy
drive, video card, SCSI
power cable, and CD-ROM
EMI shield.
Power Macintosh 7100/66 Logic Board
Upgrades Power Macintosh Upgrade - 11
1 Disconnect the following
cables from the old logic
board and reconnect
them to the new board:
• CD-ROM audio cable
(if present)
• Floppy drive cable
• SCSI data cable
Note:
You may find it
easier to connect the
cables if you remove the
drive chassis. Refer to
Take Apart.
Note
: The new SCSI
power cable is already
connected to the upgraded
logic board.
SCSI Data Cable
CD-ROM Audio SCSI
Power
Floppy
Drive
Upgrades Power Macintosh Upgrade - 12
2 If the customer’s old
logic board had DRAM
SIMMs installed, remove
them and install them on
the upgraded logic board.
Important:
You must
install DRAM SIMMs in
matching pairs (that is,
SIMMs of the same size
and speed). The SIMMs
must be 80 ns or faster,
72-pin, noncomposite
SIMMs.
Replacement Note
: Return
all VRAM and nonmatching
DRAM SIMMs from the old
logic board to the customer.
Upgrades Power Macintosh Upgrade - 19
12 If there was a power
supply strap installed on
the old unit, squeeze on
the two ends of the strap
and push it through the
metal opening on the
chassis.
13 Install the strap on the
upgraded unit.
Note:
The power supply
strap is part of the
shipping packaging for
some power supplies.
When replacing the
power supply you
should replace the strap
if present.
Power Supply
Strap
Upgrades Power Macintosh Upgrade - 21
14
Caution
: When install-
ing a video card, push
down evenly on both ends
of the card. Do not force
the card into the expan-
sion slot. If the card does
not seat properly,
remove it and try again.
To upgrade to a Power
Mac 7100/66, install
the Power Macintosh 2
MB Video Card in the
PDS slot on the logic
board. To upgrade to a
Power Mac 7100/
66AV, install the Power
Macintosh AV Card.
Upgrades Power Macintosh Upgrade - 25
17 Copy the computer’s
serial number from the
old top housing to the
new top housing.
Note:
A blank serial
number label is provided
on the back of the
upgraded bottom
housing.
18 Lower the top housing
down so that it clears the
drives and slide the top
housing back into place.
Replacement Note:
Do
not attempt to tilt the top
housing when you
install it.
Top Housing
Upgrades Power Macintosh Upgrade - 27
19
Caution:
Excessive force
on the captive screw will
damage the top housing.
Tighten the captive
screw on the top housing.
Note:
You must install
the System 7.1.2
software that came with
the Power Macintosh
Logic Board Upgrade Kit.
Refer to the user
manual provided in the
upgrade kit for instal-
lation instructions.
Top Housing
Captive
Screw
Additional Procedures Battery Verification - 1
Battery
Verification
Before you begin, remove
the following:
• Top housing
• Power supply
• Drive chassis
±
Warning:
If handled or
discarded improperly, the
lithium battery in the
computer could explode.
Review battery handling and
disposal instructions and the
ESD precautions in
Bulletins/Safety.
Battery
Additional Procedures Battery Verification - 2
1 Set the voltmeter to the
10 volts DC scale.
2 Hold the positive probe
of the voltmeter to the
positive end of the
battery (marked “+”
on the logic board) and
the negative probe to the
negative end of the
battery.
3 If the battery voltage is
below 3.2 volts, replace
the battery. Refer to
“Battery Replacement”
in this chapter.
Positive
Negative
Probe
Probe
Additional Procedures Battery Replacement - 3
Battery
Replacement
Before you begin, remove
the following:
• Top housing
• Power supply
• Drive chassis
±
Warning:
If handled or
discarded improperly, the
lithium battery in the
computer could explode.
Review battery handling and
disposal instructions and
ESD precautions in
Bulletins/Safety.
Battery
Additional Procedures Reset Logic Board - 6
Reset Logic Board
Before you begin, remove
the following:
• Top housing
• Power supply
• Drive chassis
• Power cord
Note:
Whenever you have a
unit that fails to power up,
you should follow this
procedure to reset the logic
board
before
replacing any
modules.
±
Warning:
If handled or
BatteryBattery
Additional Procedures Reset Logic Board - 10
4 Press the computer’s power-on button, which is located
on the rear panel beneath the power outlet. Wait 5–10
minutes and then
• Replace the battery
• Replace the drive chassis
• Replace the power supply
Replacement Note:
Make sure the battery is facing in
the correct (+/-) direction.
Note:
This procedure resets PRAM. Be sure to check the
computer’s time/date and other system parameter
settings.
Note:
If this procedure resolves the problem, claim an
adjustment on an SRO. If not, replace defective
component and
do not
claim the adjustment procedure.
Exploded View 1
Bottom Housing
922-0898
CD-ROM Audio Cable
922-0724
Light Pipe
815-6272
NuBus Access Cover
810-6035
Power Cable *
922-0051
922-1379
Floppy Drive Cable
922-0112
Floppy Drive Carrier
922-0763
CD ROM
Drive
661-0913
CD Carrier
Rails
922-0067
Manual Insert
Floppy Drive
661-0121
Internal Chassis
922-0058
Logic Board
661-0897
661-0208
Power Supply
661-0758
Power Supply Strap
922-0906
Top Housing
922-0405
CD-ROM
Caddiless
Bezel
CD-ROM
w/Caddy Bezel
922-0800
Blank Bezel
922-1373
Front Panel
922-0899
EMI Gasket
922-0887
Speaker
922-0055
Hard Drive *
Hard Drive
Carrier 922-0066
HDA/CD-ROM
SCSI Cable
922-0053
Power Macintosh 7100
Product family configurations may vary. For parts with asterisk (*), refer to parts list.
