Apple Macintosh Quadra Centris 700 Service Manual

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Service Source

Macintosh IIcx/IIci/

Quadra 700

Macintosh IIcx

Macintosh IIci

Macintosh Quadra 700

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Service Source

Basics

Macintosh IIcx/IIci/Quadra 700

Basics Overview - 2

Overview

This manual includes
complete repair procedures
for the Macintosh IIcx,
Macintosh IIci, and Quadra
700, shown at left.

Figure: Macintosh IIcx, IIci, and Quadra 700

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SpeciÞcations

Macintosh IIcx/IIci/Quadra 700

Specifications Processor - 1

Processor

CPU

Macintosh IIcx

Macintosh IIci

Quadra 700

Addressing

Motorola 68030 microprocessor

15.6672 MHz

Motorola 68030 microprocessor
25 MHz

Motorola 68040 microprocessor
25 MHz

32-bit registers
32-bit address/data bus

Specifications Processor - 2

Coprocessor

Built-in floating-point unit (FPU)

Specifications Memory - 3

Memory

RAM

Macintosh IIcx

Macintosh IIci

Quadra 700

ROM

Macintosh IIcx

Macintosh IIci

1 MB, expandable to 128 MB (120 ns or faster SIMMs)

1 MB, expandable to 128 MB (80 ns or faster SIMMs)

4 MB, expandable to 8 MB (80 ns, I MB SIMMs) or 20 MB

(third-party 4 MB SIMMs)

256K

512K

Specifications Memory - 4

Quadra 700

1 MB soldered on logic board; ROM SIMM socket available

Specifications Disk Storage - 5

Disk Storage

Floppy Drive

Hard Drive

Macintosh IIcx/IIci

Quadra 700

Internal 1.4 MB floppy drive

Optional internal 40, 80, or 160 MB hard drive

Internal 80, 160, or 400 MB hard drive

Specifications I/O Interfaces - 6

I/O Interfaces

Floppy Drive

SCSI

Apple Desktop Bus

Serial

Expansion

Macintosh IIcx/IIci

Quadra 700

One DB-19 serial port for connecting external floppy drives

One DB-25 external connector

Two Apple Desktop Bus (ADB) ports

Two RS-232/RS-422 serial ports; mini DIN-8 connectors

Three NuBus slots

Two NuBus slots and one processor-direct slot

Specifications I/O Interfaces - 7

Sound

Video

Macintosh IIci/ Quadra 700

Ethernet

Quadra 700

Stereo sound jack

One DB-15 video port for built-in video

Built-in Ethernet port; AUI-15 connector

Specifications I/O Devices - 8

I/O Devices

Keyboard

Mouse

Apple Keyboard

ADB mouse; DIN-4 connector

Specifications Sound and Video - 9

Sound and Video

Sound Generator

Video Display

Macintosh IIci/ Quadra 700

Apple sound chip provides 8-bit stereo sampling at 44.1 kHz
Four-voice, wavetable synthesis; capable of driving stereo

headphones or other stereo equipment through the sound jack

Supports 640 by 480 pixel screens at up to 256 colors or shades

of gray (up to 8 bits per pixel)

Supports 640 by 870 pixel screens at up to 16 shades of gray

Specifications Electrical - 10

Electrical

Line Voltage

Frequency

Maximum Power

Macintosh IIcx/IIci

Quadra 700

100Ð240 VAC, automatically configured

50Ð60 Hz, single phase

90 W (not including monitor power)

130 W (not including monitor power)
90 W continuous

Specifications Physical - 11

Physical

Dimensions

Weight

Height: 5.5 in. (14.0 cm)
Width: 11.9 in. (30.2 cm)
Depth: 14.4 in. (36.5 cm)

14 lb. (6.4 kg) with internal hard drive

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Troubleshooting

Macintosh IIcx/IIci/Quadra 700

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/System - 2

Symptom Charts

System

Does not power on—
screen is black, fan is
not running, and LED
is not lit

Clicking, chirping,
or thumping

1 Check cables.
2 Plug monitor directly into wall socket, and verify that

monitor has power.
3 Replace power cord.
4 Replace power supply.
5 Replace logic board. Retain customer’s SIMMs.

1 Replace power supply.
2 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/System

(Continued)

- 3

System shuts down
intermittently

System
intermittently
crashes or locks

System

1 Make sure air vents on sides and top of case are

2 Replace power cord.
3 Check batteries. Refer to “Battery Verification” in

4 Replace power supply.
5 Replace logic board. Retain customer’s SIMMs.

1 Make sure system software is correct version.
2 Make sure application software is known-good.
3 Replace SIMMs.
4 Replace logic board. Retain customer’s SIMMs.
5 Replace power supply.

(Continued)

unobstructed. Thermal protection circuitry may shut down

system. After 30–40 minutes, system should be OK.

Additional Procedures.

Troubleshooting Symptom Charts/Video - 4

Video

Screen is dark, audio
and drive operate, fan
is running, and LED is
lit

1 Adjust brightness on monitor.
2 Replace monitor. Refer to appropriate monitor manual to

troubleshoot defective monitor.
3 Replace video cable.
4 Move video card to different slot.
5 Replace video card.
6 Quadra 700: Replace VRAM SIMMs.
7 Macintosh IIcx/IIci: Make sure ROM jumper is on.
8 Replace SIMMs.
9 Replace logic board. Retain customer’s SIMMs.
10 Replace power supply.

Troubleshooting Symptom Charts/Video

(Continued)

- 5

Screen is dark, audio
and drive do not
operate, but fan is
running and LED is lit

Video

1 Replace video cable.
2 Replace monitor. Refer to appropriate monitor manual to

3 Quadra 700: Replace VRAM SIMMs.
4 Macintosh IIcx/IIci: Make sure ROM jumper is on.
5 Remove NuBus cards.
6 Remove peripherals.
7 Replace SIMMs.
8 Replace logic board. Retain customer’s SIMMs.
9 Replace power supply.

(Continued)

troubleshoot defective monitor.

Troubleshooting Symptom Charts/Video

(Continued)

- 6

Partial or whole
screen is bright and
audio is present, but
no video information
is visible

Screen is completely
dark, fan is not
running, and LED is
not lit

Video

1 Replace monitor. Refer to appropriate monitor manual to

2 Replace video cable.
3 Move video card to different slot.
4 Replace video card.
5 Replace logic board. Retain customer’s SIMMs.

1 Plug the monitor directly into a wall socket and verify that

2 Check battery. Refer to “Battery Verification” in Additional

3 Replace power supply.
4 Replace logic board. Retain customer’s SIMMs.

(Continued)

troubleshoot defective monitor.

the monitor has power.

Procedures.

Troubleshooting Symptom Charts/Floppy Drive - 7

Floppy Drive

Audio and video
present, but internal
drive does not operate

Disk ejects; display
shows icon with
blinking “X”

1 Replace disk with known-good system disk.
2 Verify that all external SCSI devices are disconnected.
3 Replace internal floppy drive cable.
4 Replace internal floppy drive.
5 Replace logic board. Retain customer’s SIMMs.
6 Replace power supply.

1 Replace disk with known-good system disk.
2 Replace internal floppy drive cable.
3 Replace internal floppy drive.
4 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 8

Floppy Drive

Will not eject disk 1 Switch off computer. Hold mouse button down while you

switch computer on.
2 Eject disk manually.
3 Replace floppy drive.

Attempts to eject
disk, but doesn’t

1 Push disk completely in.
2 Eject disk manually.
3 Replace floppy drive.

(Continued)

Troubleshooting Symptom Charts/Hard Drive - 9

Hard Drive

Internal hard drive
runs continuously

Internal hard drive
does not operate

Works with internal
hard drive or
external SCSI device
but not with both

1 Replace hard drive data cable.
2 Replace internal hard drive.
3 Replace logic board. Retain customer’s SIMMs.

1 Replace hard drive data cable.
2 Replace hard drive power cable.
3 Replace hard drive.
4 Replace logic board. Retain customer’s SIMMs.

1 Verify that SCSI select switch setting on external device is

not 7 or same number as internal hard drive.
2 Replace terminator on external device.
3 Verify that internal hard drive has a terminator.

Troubleshooting Symptom Charts/Peripherals - 10

Peripherals

Cursor does not move 1 Reboot system.

2 Check mouse connection.
3 If mouse was connected to keyboard, connect mouse to a

computer ADB port instead and disconnect the keyboard. If

mouse works, replace the 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.

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 11

Double-click doesn’t
open an application,
disk, or server

Peripherals

1 Remove duplicate system files on the hard drive.
2 Clear parameter RAM. System 7: Hold down <Command>

<Option> <P> <R> during startup but before “Welcome to

Macintosh” appears. System 6 and earlier: Hold down <Shift>

<Option> <Command> keys and select Control Panel from

Apple menu.
3 If mouse was connected to keyboard, connect the mouse to a

computer ADB port, and disconnect the keyboard. If mouse

works, replace the keyboard.
4 If mouse does not work in any ADB port on computer, replace

mouse.
5 Replace logic board. Retain customer’s SIMMs.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 12

No response to any
key on the keyboard

Known-good
ImageWriter or
Imagewriter II does
not print

Known-good
LaserWriter does not
print

Peripherals

1 Check keyboard connection to ADB port.
2 Replace keyboard cable.
3 Replace keyboard.
4 Replace logic board. Retain customer’s SIMMs.

1 Make sure System is 6.0.4 and Finder is 6.1 (or later).
2 Make sure the Chooser and Control Panel settings are correct.
3 Replace printer interface cable.
4 Replace logic board. Retain customer’s SIMMs.

1 Make sure System is 6.0.4 and Finder is 6.1 (or later).
2 Make sure the Chooser and Control Panel settings are correct.

(Continued)

Troubleshooting Symptom Charts/Miscellaneous - 13

Miscellaneous

No sound from
speaker

Clock not running 1 Replace battery. See “Battery Verification” in Additional

1 Verify that volume setting in the Control Panel is 1 or above.
2 Replace speaker.
3 Replace logic board. Retain customer’s SIMMs.

Procedures.
2 Replace logic board. Retain customer’s SIMMs.

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T ak e Apart

Macintosh IIcx/IIci/Quadra 700

Take Apart Cover - 1

Cover

No preliminary steps are
required before you begin
this procedure.

1 Remove the Phillips

screw.

2 Pull up on the tabs and

lift the cover until it
comes off the front end.

Take Apart Speaker Bracket and Speaker - 2

Speaker Bracket

Speaker Bracket and Speaker

and Speaker

Before you begin, remove
the cover.

Caution:

precautions in Bulletins/
Safety.

Note:

speaker bracket are two
separate, replaceable units.
To remove the speaker, you
must first remove the
speaker bracket.

Review the ESD

The speaker and

Take Apart Speaker Bracket and Speaker - 3

1 Disconnect the speaker

connector from the logic
board.

2 Gently lift the release

latch and pull back on
the bracket until it
comes free from the

Speaker

Connector

case.

Take Apart Speaker Bracket and Speaker - 4

3

Caution:

Do not push on
the heavy paper part of
the speaker.

Gently push the speaker
from the bracket.

Speaker Bracket

Speaker

Take Apart Power Supply - 5

Power Supply

Before you begin, remove

Power Supply

the cover.

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Power Supply - 6

Note:

Use some force in

lifting the power supply. If

Power
Supply

Lip

Power
Supply

Lip

the power supply does not
move, verify that the latch
is released.

Release the latch and lift the
power supply from the
computer.

Slot

Power Supply

in Case

Replacement Note:

Make

sure the lips of the power

Slot

in Case

supply align with the slots
in the case. Slide the power
supply down until you hear a
click.

Latch

Take Apart Fan Bracket and Fan - 7

Fan Bracket and Fan

Before you begin, remove
the following:

• Cover

• Power supply

Fan Bracket
and Fan

Caution:

precautions in Bulletins/
Safety.

Note:

bracket are two separate,
replaceable units. To remove
the fan, you must first
remove the fan bracket.

Review the ESD

The fan and fan

Take Apart Fan Bracket and Fan - 8

1 Gently squeeze together

the two bracket latches
and release them from
the metal tabs.

2 Push up on the latches

until you can access the
fan power cable
connector.

3 Disconnect the cable

Bracket

Latches

Fan Power

Cable

Connector

Metal

Tabs

from the power supply
and pull the fan bracket
from the case.

Take Apart Fan Bracket and Fan - 9

4 Release the two latches

Bracket

and push the fan from
the bracket.

Latch

Fan

Latch

Replacement Note:

Push the
fan wire into the power
supply case far enough to
prevent the fan blades from
striking the wire.

Take Apart Hard Drive - 10

Hard Drive

Hard Drive

Before you begin, remove
the following:

• Cover

• Power supply

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Hard Drive - 11

Note:

The hard drive is
located on the top of the
drive mount. You can remove
the hard drive with or
without removing the mount.
The following procedure
describes how to remove the
hard drive without removing
the mount. (The procedure
for removing the mount is in
“Floppy Drive and Mount.”)

Take Apart Hard Drive - 12

1 Disconnect the hard

drive data cable and
hard drive power cable
from the hard drive.

Hard Drive
Data Cable

Hard Drive
Power Cable

Take Apart Hard Drive - 13

2 Lift the LED holder on

LED

the front of the case and
pull out the LED.

LED Holder

Take Apart Hard Drive - 14

Tab

Hard Drive

Tab

3 Squeeze the two tabs and

gently pull up.

4 Remove the hard drive

along with its carrier.

Replacement Note:

For
information on removing the
hard drive from the carrier
and returning drives,
cables, and carriers to
Apple, refer to Additional
Procedures in the Hard
Drives manual.

Take Apart Floppy Drive and Mount - 15

Floppy Drive and Mount

Before you begin, remove
the following:

• Cover

• Power supply

Floppy Drive

and Mount

Caution:

precautions in Bulletins/
Safety.

Note:

drive, you must remove the
drive mount.

Review the ESD

To remove the floppy

Take Apart Floppy Drive and Mount - 16

1 Lift the LED holder on

LED

the front of the case and
pull out the LED.

LED Holder

Take Apart Floppy Drive and Mount - 17

2 Remove the screw from

the drive mount.

3 Pull up on the paper tab

and disconnect the hard
drive data cable from the
logic board.

Hard Drive

Data Cable

Paper
Tab

Take Apart Floppy Drive and Mount - 18

4 Disconnect the floppy

drive cable and hard
drive power cable from
the logic board.

Hard

Drive

Power

Cable

Floppy
Drive
Cable

Take Apart Floppy Drive and Mount - 19

5 Release the latch and

pull the mount toward
the rear of the case about
1/2 inch.

6 Lift the mount from the

Latch

case.

Take Apart Floppy Drive and Mount - 20

7 Turn over the mount and

Floppy Drive

gently push down the
drive latch.

8 Slide the floppy drive

toward the front of the
mount about 1 inch and
pull the drive out of the
mount.

Drive Latch

Take Apart Floppy Drive and Mount - 21

Replacement Note:

recommends using dust
shields on 1.4 MB
SuperDrives. All 1.4 MB
replacement drives ship
with the dust shield already
installed. If you plan to
install a dust shield on the
current drive, you must
first clean the drive.

Apple

Take Apart Logic Board - 22

Logic Board

Before you begin, remove
the following:

• Cover

• Expansion cards

• Power supply

• Drive mount

• Reset/interrupt switch

• Speaker bracket

Logic Board

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Logic Board - 23

Logic Board

1 Slide the logic board

toward the front of the
case until the board
stops.

2 Gently lift the front end

of the logic board and
remove the board from
the case.

Replacement Note:

Before
you replace the logic board,
make sure the metal
grounding tabs that
surround the port holes on
the rear of the case are not
folded in front of the holes.

Take Apart Logic Board - 24

Replacement Note:

the SIMMs from the
defective logic board and
install them on the
replacement logic board.

Remove

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Upgrades

Macintosh IIcx/IIci/Quadra 700

Upgrades Macintosh IIci Upgrade - 1

Power Cable

Macintosh IIci

Logic Board

SIMMs

Bottom Case

Macintosh IIci Upgrade

Before you begin,remove the
following:

• Cover

• Expansion cards

• Power supply

• Drive mount

• Reset/interrupt switch

• Speaker bracket

• Logic board

Note:

The Macintosh IIci
Upgrade Kit for the
Macintosh IIcx includes a
IIci logic board, 1 MB of

Upgrades Macintosh IIci Upgrade - 2

80 ns fast page mode DRAM
SIMMs, a new bottom case,
and a new hard drive power
cable.

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Upgrades Macintosh IIci Upgrade - 3

1 Using the SIMM removal

tool, remove the DRAM

SIMM Removal Tool

SIMMs from the old logic
board and, if they are
120 ns SIMMS, give
them to the customer.

2 Discard the bottom case.

(You need not return it
to Apple.)

SIMM

Upgrades Macintosh IIci Upgrade - 4

3 Insert the new Macintosh

IIci logic board into the
new bottom case.

Replacement Caution:

sure to insert the replace­ment DRAM SIMMs (or
other 80 ns SIMMs) into the
Macintosh IIci logic board.
If you use the 120 ns SIMMs
from the Macintosh IIcx,
the new Macintosh IIci will
not function correctly.

Replacement Note:

finish the Macintosh IIci
upgrade, install the speaker,
drives, drive mount (using

Be

To

Upgrades Macintosh IIci Upgrade - 5

the new hard drive power
cable), power supply, and
reset/interrupt switch.
(Refer to Take Apart for
detailed procedures.) If the
unit contains a hard drive,
install the hard drive light
pipe from the old case in the
new Macintosh IIci bottom
case.

Upgrades Quadra 700 Upgrade - 6

Power Cable

Quadra 700
Logic Board

Bottom Case

Quadra 700 Upgrade

Before you begin, remove
the following:

• Cover

• Expansion cards

• Power supply

• Drive mount

• Reset/interrupt switch

• Speaker bracket

• Logic board

Note:

The Macintosh Quadra
700 Upgrade Kit includes a
Quadra 700 logic board, a
new bottom case, and a new
hard drive power cable.

Upgrades Quadra 700 Upgrade - 7

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Upgrades Quadra 700 Upgrade - 8

1 Using the SIMM removal

tool, remove the DRAM

SIMM Removal Tool

SIMMs from the old logic
board and, if they are
120 ns SIMMS, give
them to the customer.

2 Discard the bottom case.

(You need not return it
to Apple.)

SIMM

Upgrades Quadra 700 Upgrade - 9

3 Insert the new Quadra

700 logic board into the
new bottom case.

Replacement Caution:

sure to insert the replace­ment DRAM SIMMs (or
other 80 ns SIMMs) into the
Quadra 700 logic board. If
you use 120 ns SIMMs, the
new Quadra 700 will not
function correctly.

Replacement Note:

finish the Quadra 700
upgrade, install the DRAM
SIMMs, speaker, drives,
drive mount (using the new

Be

To

Upgrades Quadra 700 Upgrade - 10

hard drive power cable),
power supply, and reset/
interrupt switch. (Refer to
Take Apart for detailed
procedures.)

Upgrades Expansion Cards - 11

Expansion Cards

Before you begin,remove the
cover.

Expansion Card

Expansion Card

Caution:

precautions in Bulletins/
Safety.

Caution:

both sides of the card to
avoid bending the connector
pins.

Carefully grasp each end of
the card and pull straight up
to remove it.

Review the ESD

Pull up evenly on

Upgrades Expansion Cards - 12

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.

Upgrades Power Macintosh Upgrade Card - 13

Power Macintosh Upgrade Card

By installing this card in the
Macintosh Quadra 700
Processor-Direct Slot
(PDS), you can upgrade the
Quadra 700 to a PowerPC
microprocessor.

For more information,
including installation
instructions, refer to Basics
in the Power Macintosh
Upgrade Card manual.

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Additional Procedures

Macintosh IIcx/IIci/Quadra 700

Additional Procedures Battery Verification - 1

Battery

Lithium Battery

Verification

Before you begin, remove
the following:

• Cover

• Power supply

• Drive mount

±

Warning:

handling and disposal
instructions in Bulletins/
Safety.

Caution:

precautions in Bulletins/
Safety.

Review battery

Review ESD

Additional Procedures Battery Verification - 2

1 Set the voltmeter to the

10 volts DC scale.

2 Hold the positive probe

Negative
Probe

of the voltmeter to the
positive end of the
battery (marked “+”

Positive
Probe

on the logic board) and
the negative probe to the
negative end of the
battery.

3 If the battery voltage is

below 2.8 volts, replace
the battery. Refer to
“Battery Replacement”
in this chapter.

Additional Procedures Battery Replacement - 3

Battery

Lithium Battery

Replacement

Before you begin, remove
the following:

• Cover

• Power supply

• Drive mount

±

Warning:

handling and disposal
instructions in Bulletins/
Safety.

Caution:

precautions in Bulletins/
Safety.

Review battery

Review ESD

Additional Procedures Battery Replacement - 4

1 Using a small flat-blade

screwdriver, pry open
the latch at the end of the
holder and lift off the
cover.

Additional Procedures Battery Replacement - 5

2 Grasp the battery and

remove it from the
holder.

3 Return the battery to

Apple for proper
disposal. For battery
packaging and labeling
instructions, refer to
the safety information in
Bulletins/Safety.

Additional Procedures Reset/Interrupt Switch - 6

Reset/Interrupt

Reset/Interrupt Switch

Switch

Before you begin, remove
the cover.

Caution:

precautions in Bulletins/
Safety.

Review ESD

Additional Procedures Reset/Interrupt Switch - 7

1 With one finger, lift the

center tab of the switch.

Reset/Interrupt Switch

2 Gently lift the rear of

the switch up and away
from the front of the
case.

Additional Procedures SCSI Termination - 8

SCSI Termination Block

SCSI Connector

Logic Board

SCSI Termination

No preliminary steps are
required before you begin
this procedure.

The SCSI termination block
provides proper termin­ation for systems without
an internal hard drive. All
Macintosh Quadra 700
computers that shipped
without internal hard drives
have the termination block
attached to the logic board
SCSI connector. After you
install an internal hard
drive, remove the block.

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Exploded V ie w

Macintosh IIcx/IIci/Quadra 700

Exploded View 1

Exploded View

Macintosh IIcx/IIci and Quadra 700

416-1414

Top

Cover

Hard Drive

LED

Cable

HDA

Light Pipe

Drive

Carrier

Internal

Shield

844-0081

Floppy

Drive

Speaker

Bracket

Speaker

Hard Drive
Power Cable

Fan
Bracket

416-1412

Fan

444-6104

Power
Supply

On/Off
Button

Reset/

Interrupt

Switch

Feet

Logic
Board

Bottom
Case

Power-On
Light Pipe

AC Power Cable