Apple Macintosh Quadra Centris Performa 640 Service Manual

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Service Source

LC 630/Quadra 630/

Performa 640

Macintosh LC 630, Macintosh LC 630 DOS Compatible,

Macintosh Performa 640 DOS Compatible, Macintosh

Quadra 630

K

Service Source

Basics

LC 630/Quadra 630/Performa 640

Basics General Information - 2

General Information

Macintosh LC 630 and Macintosh Quadra 630
Computers

The Macintosh LC 630 and Macintosh Quadra 630 computers
are high- performance, low-cost modular computers with
multimedia features. The LC 630 uses the Motorola
68LC040 processor. The Quadra 630 uses the Motorola
68040, which includes a floating point unit. The computers
ship with the manual insert floppy drive, an IDE hard drive,
and an optional trayloading CD-ROM drive.

Basics General Information - 3

Macintosh LC 630, DOS-Compatible

The LC 630 DOS-Compatible computer adds to the basic 630
design the ability to simultaneously run the Macintosh
operating system and PC application programs. The DOS­Compatible computer ships with three boards and a DRAM
SIMM installed on the main logic board. The three boards
are the DOS-compatible board, a daughterboard for sound,
and a DOS-Compatible adapter board in the Processor Direct
Slot (PDS).

Basics General Information - 4

Performa 640 DOS-Compatible

The Performa 640 DOS-Compatible is based on the
Macintosh LC 630-DOS Compatible computer.

The Performa 640 DOS-Compatible is bundled with a 500
IDE hard drive and the trayloading double-speed CD-ROM
drive.

As you go through this manual, consider the Macintosh LC
630 DOS-Compatible information as applicable to the
Performa 640 LC DOS-Compatible unless specified
otherwise.

Basics General Information - 5

User Controls

User controls include:

• Soft power-on control from keyboard

• Front panel sound-control push buttons

• Optional infrared remote control

Basics General Information - 6

Internal Expansion Connections

Four types of expansion slots on the logic board include:

• DRAM SIMM expansion slot (1 or 2 slots)

• LC PDS slot (already populated in the LC 630 DOS­Compatible).

• Communications slot for modems and Ethernet

• Video-in slot for real-time video display, capture, and
overlay

In addition to expansion slots on the logic board, there is an
expansion ribbon connector for an optional TV tuner card.
The TV-tuner connector provides NTSC and PAL input from
an external TV antenna or cable.

Basics General Information - 7

IDE (Intelligent Device Electronics)

The internal hard drive uses IDE (Intelligent Device
Electronics) technology, commonly used in DOS-compatible
systems.

The internal IDE hard drive functions the same as a typical
SCSI hard drive. You must replace IDE drives like for like.

The IDE drive does not affect SCSI ID selections or SCSI
termination schemes.

Seven external SCSI devices may be daisy chained through
the external SCSI port.

Basics General Information - 8

Plastic Panel Design

The computer is designed for easy service. Plastic panels
cover the metal bottom case, the metal top cover shield, and
the left, right, and rear sides of the metal case.

To service the logic board, simply remove the rear plastic
panel and slide out the logic board. To access the drives,
simply remove the front plastic panel.

Basics Rear View Diagram - 9

Rear View Diagram

TV Tuner

Access Cover

Monitor Port

Standby Power Button

Security

Lock Port

Power

Socket

Basics I/O Door Diagrams - 10

I/O Door Diagrams

Video-In Card Access Cover

Communication Card

Access Cover

PDS Expansion Card

Access Cover

ADB Port

Printer Port

Modem Port

SCSI Port

630 Series Computers

Sound Output Port

Sound Input Port

Basics Logic Board Diagrams - 11

Logic Board Diagrams

Video-In Card Access Cover

Communication Card

Access Cover

DB-15 DOS-

CompatibleAdapter Connector

ADB Port

Printer Port

Modem Port

SCSI Port

Sound Output Port

Sound Input Port

Basics Shield/Wiring Harness - 12

Shield/Wiring Harness

Video-In Card

Communications Slot

DRAM SIMM Slot

PDS Expansion Slot

630 Series Computers

Basics Shield/Wiring Harness - 13

LC 630 DOS-Compatible Logic Board

DRAM SIMM

DOS-Compatible Board

Main Logic Board

DOS-Compatible Adapter Board

DOS-Compatible Sound Board

Basics Shield/Wiring Harness - 14

Basics Shield/Wiring Harness - 15

DB-15 Video Connector

26-Pin IR Connector

20-Pin

Floppy Drive

Connector

Monitor-Out

Daughterboard

Power

Connector

40-Pin IDE Connector

10-Pin TV Tuner Connector

CD Audio

4-Pin

CD

Audio

6-Pin Header

to P/S

30-Pin

CD Connector

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Service Source

Specifications

LC 630/Quadra 630/Performa 640

Specifications Processor - 2

Processor

LC 630

Quadra 630

LC 630 DOS­Compatible

Addressing

Motorola 68LC040 microprocessor
33 MHz

Motorola 68040 microprocessor
(with floating point unit)
33 MHz

Motorola 68040, 33 MHz
80486DX2, 66 MHz

32-bit internal registers
32-bit address bus
32-bit data bus

Specifications Memory - 3

Memory

DRAM

630 Series: 4 MB built in, 8 MB optional; expandable to 36 MB

(if logic board has only one SIMM slot, part number 661­0158 ), or 52 MB (if logic board has two SIMM slots; one slot
is a regular SIMM slot and the other is a single-sided SIMM
slot, part number 661-1114).

LC 630 DOS-Compatible ships with 8 MB on main logic board (4

MB built in and 4 MB DRAM SIMM in one slot). Maximum
addressable memory is 52 MB on the main logic board (4 MB
built in, 32 MB SIMM in one slot and 16 MB SIMM the second
slot).

DOS Compatible board ships with 4 MB SIMM . Maximum

addressable memory is 32 MB on the DOS-Compatible board.
Main logic board and DOS Compatible board require 72-pin,
80 ns or faster SIMMs.

Specifications Memory - 4

DRAM Frame Buffer

ROM

VRAM

1 MB

1 MB

Video data are stored in the 1 MB DRAM frame buffer. The LC

630, Quadra 630, and LC 630 Dos-Compatible computers do
not support video memory expansion.

Specifications Disk Storage - 5

Disk Storage

Floppy Drive

CD-ROM Drive

Hard Drive

1.4 MB Apple SuperDrive Manual Insert

Optional Apple 300i Plus CD-ROM drive

630 Series: 250 MB or 350 MB IDE hard drive
LC 630 DOS-Compatible: 500 MB IDE hard drive

Note:

The internal IDE hard drive interface is new to Apple
products. Macintosh 630 computers do not support internal
SCSI hard drives.

Specifications I/O Interfaces - 6

I/O Interfaces

Serial

SCSI

Apple Desktop Bus

Video

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

One external SCSI port; DB-25 connector
Supports up to six external SCSI devices

One Apple Desktop Bus (ADB) port; mini DIN-4 connector

One DB-15 monitor port on built-in video daughterboard

Specifications I/O Interfaces - 7

Sound

Processor-Direct Slot

Communications Slot

Video-In Slot

Mono sound input port supports external microphone or
line-level inputs
Bias current for electret microphone
Stereo sound output jacks at front and rear

630 Series: One 114-pin internal expansion slot for LC

compatible processor-direct card

LC 630 DOS-Compatible: An adapter board occupies the LC

processor-direct slot, providing a DB-15 connector for a PC/
AT game controller

One 112-pin internal expansion slot for modem and Ethernet

One 60-pin internal video-in slot for real-time video display,

capture, and overlay

Specifications I/O Interfaces - 8

TV Tuner

Controls

One 10-pin slot for TV tuner card

Softpower-on control from keyboard
Front panel push button control for sound volume
Front panel stereo headphone jack
Optional infrared remote control

Specifications I/O Devices - 9

I/O Devices

Keyboard

Mouse

Microphone

Apple Extended Keyboard II (other ADB keyboards supported)

ADB Mouse II

Electret, omnidirectional
Operates on 8 VDC supplied by sound input on CPU

Specifications Sound and Video - 10

Sound and Video

Sound

Video

8-bit monophonic sound input
8-bit stereo sound output (16-bit in CD mode), level nominally

0.5 V RMS into 39 ohms

Internal speaker muted when a plug is inserted into an output jack

Supports all Apple 12-inch, 13-inch, and 14-inch monitors,

Apple 15-inch multiple synchronous monitor, and VGA (640 x

480) monitors at maximum 16-bit per pixel

Supports Apple 16-inch and SVGA (800 x 600) monitors at

maximum 8-bit per pixel

Specifications Electrical - 11

Electrical

Line V oltage

Frequency

Maximum Power

100-240 VAC

50-60 Hz

45 W, not including monitor

Specifications Physical - 12

Physical

Dimensions

Weight

Height: 4.3 in. (10.95 cm)
Width: 16.5 in. (41.95 cm)
Depth: 12.6 in. (32 cm)

Without CD-ROM: 17 lb. (7.7 kg)
With CD-ROM: 19 lb. (8.6 kg)
Weight varies with options

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Service Source

Troubleshooting

LC 630/Quadra 630/Performa 640

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 - 2

Symptom Charts

Error Chords

Eight-tone error
chord sounds during
startup

Four-tone error
chord sounds during
startup

1 Reseat SIMMs
2 Replace SIMMs.
3 Replace logic board. Retain customer’s SIMMs.
4 Perform SIMM verification on replacement logic board.

1 Disconnect hard drive power cable and 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 - 3

System

Flashing “?”
appears at startup in
system with vacant
PDS and
communication slots

Menu bar constantly
flashes or system
constantly beeps

1 Diagnose hard drive with Disk First Aid included on Power

Macintosh CD-ROM.
2 Perform repairs and then go to step 4.
3 If repairs are impossible, back up drive, reformat with

Drive Setup 1.0.3, and then go to step 4.
4 Update driver using Drive Setup 1.0.3.
5 Perform clean install

1 Verify that front panel control buttons are not jammed.
2 Reseat drive bezel and front panel control board.

Troubleshooting Symptom Charts/Audio - 4

Audio

Crackling noise is
present when you
play sounds other
than system beeps
and you are not in
“play through” mode

This applies to DOS­compatible
computers only:
Static through
speaker with optional
sound adapter board
installed and Internal
CD and Playthrough
option selected.

1 If static noise varies when you adjust volume by Sound

control panel, use Audio Volume Extension 1.1 or later.

Note: Audio Volume Extension is available from standard

Apple software update sites.
2 Replace logic board.

Replace the sound card, PN 661-0253.

Troubleshooting Symptom Charts/Audio - 5

Audio

Sound distortion with
MPEG board installed

Replace MPEG board with modified MPEG board. A modified board
should have a jumper present from U5 Pin 2 to D1 Pin 1.

Troubleshooting Symptom Charts/Video - 6

Video

Screen is dark, audio
and at least one drive
operate, fan runs,
and LED is lit

Video will not play or
system hangs when
you attempt to run
video in units with
MPEG card

1 Confirm that video connections are secure.
2 Confirm that monitor-out daughterboard connection on the

fan bracket is secure.
3 Reseat logic board.
4 Perform monitor adjustments
5 Replace monitor.
6 Replace logic board. Retain customer’s SIMMs.
7 Replace power supply.

1 If chip at location U12 on MPEG card displays number

341SO205, check all connections.
2 If chip at location U12 on MPEG card does not display

number 341SO205, replace MPEG card

Troubleshooting Symptom Charts/Video - 7

Video

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

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

1 Reseat logic board.
2 Remove expansion card, if present.
3 Remove peripherals.
4 Replace SIMMs. Refer to Memory manual.
5 Replace logic board. Retain customer’s SIMMs.
6 Replace power supply.

1 Reseat logic board.
2 Replace fan/video card bracket.
3 Replace monitor.
4 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Video - 8

Video

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

1 Check all external power connections.
2 Computer powers on exclusively through softpower on

keyboard. Verify that power-on connections of keyboard

are functioning by testing with known-good keyboard.
3 Reseat logic board.
4 Unplug 4.5 battery, wait 20 seconds, plug in battery, and

restart computer.
5 Verify that monitor has power.
6 Remove expansion card, if present.
7 Remove peripherals.
8 Replace power supply.
9 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Video - 9

Video

Vertical lines,
horizontal lines, or
snow appears on
screen, or screen is
completely dark;
startup tone is
normal

Unable to tune in some
UHF channels.

1 Perform monitor adjustments.
2 Replace monitor.
3 Replace logic board. Retain customer’s SIMMs.
4 Replace power supply.

Replace Rev. A video-in card, part number 661-0159, with Rev.
B video-in card, part number 661-1073.

Troubleshooting Symptom Charts/Floppy Drive - 10

Floppy Drive

Audio and video are
present, but internal
drive does not operate

Disk ejects; display
shows Mac icon with
blinking “X”

Disk does not eject 1 Switch off system and hold mouse button down while

1 Reseat logic board
2 Replace floppy drive.
3 Replace shield/wiring harness
4 Replace logic board. Retain customer’s SIMMs.

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

switching system back on.
2 Eject disk manually by pushing opened paper clip into hole

beside drive slot.
3 Replace floppy drive cable.
4 Replace floppy drive.

Troubleshooting Symptom Charts/Floppy Drive - 11

Floppy Drive

Drive attempts to
eject disk, but doesn’t

1 Switch off system and hold mouse button down while

switching system back on.
2 Eject disk manually by pushing opened paper clip into hole

beside drive slot.
3 Replace floppy drive cable.
4 Replace floppy drive.

Troubleshooting Symptom Charts/Hard Drive - 12

Hard Drive

Internal hard drive
runs continuously

Internal hard drive
does not operate

Hard drive not found
when booted from CD­ROM drive

1 Make sure System is version 7.1.2 (or later).
2 Replace hard drive cable.
3 Replace internal hard drive.
4 Replace logic board. Retain customer’s SIMMs.

1 Confirm that all hard drive connections are secure.
2 Reseat logic board.
3 Replace internal IDE hard drive.
4 Replace shield/wiring harness chassis.
5 Replace logic board. Retain customer’s SIMMs.

Use Drive Setup 1.03.

Troubleshooting Symptom Charts/CD-ROM drive - 13

CD-ROM drive

CD-ROM drive does
not accept disc

Volume control does
not operate correctly

Macintosh cannot
mount CD-ROM drive

1 Replace disc (if dirty or damaged).
2 Reseat CD-ROM drive.
3 Replace CD-ROM drive.

1 Check Control Panel Sound setting.
2 Check front panel controls.
3 Reseat front panel control board.
4 Replace shield/wiring harness chassis.

1 Reseat CD-ROM drive.
2 Check SCSI ID setting; internal CD-ROM drive was originally

set at 3 at the factory.
3 Replace CD-ROM drive.

Troubleshooting Symptom Charts/Peripheral - 14

Peripheral

Works with internal
or external SCSI
device but does not
work with both

Cursor does not move 1 Reboot system.

1 Verify that SCSI select switch on external device is set to

different priority from internal CD-ROM drive.
2 Verify that both ends of external SCSI device are terminated.
3 Replace terminator on external device.
4 Verify that terminator is installed on internal SCSI drive.
5 Replace SCSI select cable (on external SCSI device).

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

ADB port and disconnect keyboard. If mouse works, replace

keyboard.
4 If mouse does not work in ADB port, replace mouse.
5 Reseat logic board.
6 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Peripheral - 15

Peripheral

Cursor moves, but
clicking mouse
button has no effect

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

1 Replace mouse.
2 Reseat logic board.
3 Replace logic board. Retain customer’s SIMMs.

1 Remove extra system files on hard drive.
2 Check mouse speed on Control Panel
3 Unplug 5.4 battery, wait 20 seconds, plug in battery, and

restart computer.
4 If mouse was connected to keyboard, connect mouse to rear

ADB port and disconnect keyboard. If mouse works, replace

keyboard.
5 If mouse does not work in ADB port, replace mouse.
6 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Peripheral - 16

Peripheral

No response to any
key on keyboard

Known-good
ImageWriter or
ImageWriter II does
not print

1 Make sure System is version 7.1.2 (or later).
2 Check keyboard connection to ADB port.
3 Replace keyboard.
4 Reseat logic board.
5 Replace logic board. Retain customer’s SIMMs.

1 Make sure that Chooser and Control Panel settings are

correct.
2 Make sure System is version 7.1.2 (or later).
3 Check printer DIP switches.
4 Replace printer interface cable.
5 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Peripheral - 17

Peripheral

Known-good
LaserWriter does not
print

1 Make sure that Chooser and Control Panel settings are

correct.
2 Make sure System is version 7.1.2 (or later).
3 Refer to Networks manual.

Troubleshooting Symptom Charts/Miscellaneous - 18

Miscellaneous

Rattling sound at
startup in system
with Apple External
Video Connector

Press or fold Apple External Video cable to prevent it from
contacting fan blades.

Troubleshooting Symptom Charts/Global Village Modem “Busy Serial Port” - 19

Global Village Modem “Busy Serial Port”

Using modem gives
message: “Can’t find
or can’t access a
modem to use for
registration. Make
sure you have Global
Village software
installed correctly,
reboot your
computer, and try
again. If you want to
use a specific modem
for registration,
select it from
Chooser.”

The TelePort Control Panel becomes corrupted when a Performa
640CD is restarted while AppleTalk is set to “Inactive” in the
Chooser or LocalTalk is not the selected AppleTalk Connection in
the Network Control Panel. Follow these steps;

1 Obtain GlobalFax 2.5.2P Update.
2 Restart the computer with extensions off.
3 Double-click Performa GlobalFax 2.5.2 Update icon.
4 Click Update button and watch for update confirmation

window.
5 Restart computer.
6 Customer should keep backup copy of 2.5.2 Update program

and run it after reinstalling software from backup CD.

Troubleshooting Symptom Charts/Global Village Modem “Busy Serial Port” - 20

Global Village Modem “Busy Serial Port”

Resetting modem in
TelePort Control
Panel gives message:
“The current port is
busy and cannot be
opened. Quit any open
communication
application, or turn
off AppleTalk in the
Chooser (if the
modem is connected to
the Printer port),
and then reopen the
TelePort control
panel.”

Here’s an alternative fix that doesn’t require GlobalFax 2.5.2P
Update:

1 Replace corrupted control panel in System Folder with

uncorrupted copy of TelePort Control Panel found in Control

Panels folder on backup CDs.
2 Set AppleTalk to “Active” and select LocalTalk as the

AppleTalk Connection in Network Control Panel.

K

Service Source

T ak e Apart

LC 630/Quadra 630/Performa 640

Take Apart Drive Bezel - 2

Drive Bezel

No preliminary steps are

Drive Bezel

required before you begin
this procedure.

1 Locate the two latches

below the ridge on the
drive bezel.

Take Apart Drive Bezel - 3

Screwdriver

Latch

Caution:

When using a
screwdriver to release a
latch, press up
carefully. Do not
scratch or gouge the
plastic.

2 Insert a flat-blade

screwdriver at each
latch.

3 Pry up to release each

latch.

Take Apart Drive Bezel - 4

4 Swing up the drive bezel

and pull it away from the
metal chassis.

Drive Bezel

Take Apart Front Panel Control - 5

Front Panel Control

Front Panel Control

Before you begin, remove
drive bezel.

Review the ESD precautions
in Bulletins/Safety.

Take Apart Front Panel Control - 6

Front Panel Control

Latch

Side Panel

1 Insert a flat-blade

screwdriver about an
inch between the side
panel and the front
panel control.

2 Pry open the latch to

release the front panel
control.

Take Apart Front Panel Control - 7

3 Pull the front panel

control out just far
enough to reach the
ribbon cable connector.

Front Panel Control

Headphone Jack

Replacement Caution:

When you replace the
front panel control
assembly, make sure
that the headphone jack
is at the bottom of the
assembly.

Take Apart Front Panel Control - 8

4 Disconnect the front

panel control from the
ribbon cable.

Ribbon Cable

Front Panel

Control

Take Apart Drive Security Bracket - 9

Drive Security Bracket

Before you begin, remove
drive bezel.

Review the ESD precautions
in Bulletins/Safety.

Drive Security Bracket

Take Apart Drive Security Bracket - 10

Remove the mounting screw
and pull off the drive
security bracket.

Drive

Security

Bracket

Tab

Tab Tab

Replacement Note:

Be sure
to correctly position the
four tabs of the drive
security bracket.

Take Apart Floppy Drive - 11

Floppy Drive

Before you begin, remove
the following:

• Drive bezel

• Drive security bracket

Review the ESD precautions
in Bulletins/Safety.

Floppy Drive

Take Apart Floppy Drive - 12

1 Lift the front of the

floppy drive and carrier.

2 Pull the floppy drive

out just far enough to
reach the ribbon cable

Floppy Drive

connector.

Carrier

Guide

Tab

Replacement Note:

When you replace the
floppy drive, make sure
that the tab of the floppy
carrier is seated
properly in the floppy
drive guide.

Take Apart Floppy Drive - 13

3 Disconnect the floppy

drive from the floppy
drive cable.

Floppy Drive Cable

Replacement Note:

If
you are replacing a
defective floppy drive,
invert the drive and
carrier and remove the
four carrier mounting
screws. Separate the
drive from the carrier.

Floppy Drive

Take Apart CD-ROM Drive - 14

CD-ROM Drive

Before you begin, remove
the following:

• Drive bezel

• Drive security bracket

Review the ESD precautions
in Bulletins/Safety.

CD-ROM Drive

Take Apart CD-ROM Drive - 15

Note:

To perform the next
procedure, you may want to
insert a screwdriver in the

CD-ROM Drive

slot of the release latch to
help you pull the CD-ROM
drive.

1 Push up the release latch

and pull the CD-ROM
drive from the chassis.

Note:

You may need to

Release Latch

use some initial force to
disconnect the CD-ROM
from the internal wiring
harness.

Take Apart CD-ROM Drive - 16

Note:

CD-Carrier

Perform the
following steps only if
you are replacing a
defective CD-ROM drive.

2 Disconnect the CD-ROM

audio adapter from the
drive.

3 Disconnect the SCSI

adapter.

CD Audio Adapter

SCSI Adapter

4 Remove the four

mounting screws and
carrier from the CD­ROM drive.

Take Apart CD-ROM Drive - 17

Replacement Caution:

Before replacing the
SCSI adapter, make sure
that the SCSI drive
connector pins are not
bent.

Take Apart Hard Drive - 18

Hard Drive

Before you begin, remove
the following:

• Drive bezel

• Drive security bracket

Review the ESD precautions
in Bulletins/Safety.

Note:

The IDE hard drive
interface is new to Apple
products. LC 630 and Quadra
630 computers do not

Hard Drive

support internal SCSI hard
drives. Refer to Basics for
more information.

Ê

Take Apart Hard Drive - 19

1 Using the pull tabs,

disconnect the IDE data
cable from the hard
drive connector.

2 Disconnect the power

cable.

Power Cable

IDE Data Cable

Take Apart Hard Drive - 20

3 Using a flat-blade

screwdriver, push up
the release latch and pull
the IDE hard drive from
the chassis.

IDE Hard Drive

Release Latch

Take Apart I/O Door - 21

I/O Door

No preliminary steps are
required before you begin
this procedure.

Review the ESD precautions
in Bulletins/Safety.

I/O Door

Take Apart I/O Door - 22

1 Push down the two

locking tabs and swing
down the door.

Tab

Tab

I/O Door

Take Apart I/O Door - 23

Hinge Tab

Hinge Tab

I/O Door

Hinge Tab

Replacement Note:

Carefully align the
three hinge tabs before
swinging up the 1/0
door.

Take Apart Logic Board - 24

Logic Board

Before you begin, remove
I/O door.

Review the ESD precautions
in Bulletins/Safety.

Note:

If you are replacing a
logic board that has one
SIMM slot, replace it with
P/N 661-0158. If you are
replacing a logic board that
has two SIMM slots, replace
it with P/N 661-1114.

Logic Board with Fence

Take Apart Logic Board - 25

Note:

The 630 series
includes a variety of logic
board configurations. This
topic describes the logic
board removal procedures
common to all models in this
series. See “DOS-Compat.
Logic Board” topic, for
procedures specific to that
logic board. See Upgrades
chapter, “Processor
Upgrade” topic, for
procedures about the RISC
processor logic board
upgrade.

Ê

Take Apart Logic Board - 26

1 Remove the two screws

from the metal fence.

Screw

Screw

Metal Fence

Take Apart Logic Board - 27

Note:

The logic-board-and­fence assembly may need a
firm initial tug to loosen it
from the shield/wiring
harness.

Logic Board Fence

2 Slide out the logic-

board-and -fence­assembly.

Logic Board

Take Apart Logic Board - 28

Note:

Perform the following

Logic Board

Phillips Screw

steps only if you are
replacing a defective logic
630 board. Do not attempt
to

3 Remove the two Phillips

screws that secure the

Torx Screw

Torx Screw

SCSI

Connector

fence to the solder side of
the logic board.

4 Using a T9 torx driver,

remove the two torx
screws that secure the
logic board fence to the
SCSI connector.

Phillips Screw

Logic Board Fence

5 Separate the logic board

fence from the logic
board.

Take Apart DOS Compat. Logic Board - 29

DOS Compat. Logic Board

Adapter Board

Main Logic

Board

Sound Board

DOS-Compatible Board

DRAM

SIMM

Before you begin, remove
the following:

• I/O door

• Logic board

Review the ESD precautions
in Bulletins/Safety.

Note:

If you are replacing a
logic board that has one
SIMM slot, replace it with
P/N 661-0158. If you are
replacing a logic board that
has two SIMM slots, replace
it with P/N 661-1114.

Take Apart DOS Compat. Logic Board - 30

Note:

The LC 630 DOS­Compatible logic board
includes the main logic
board with DRAM SIMM, the
DOS-Compatible board with
DRAM SIMM, DOS­Compatible sound board,
DOS-Compatible adapter
board, and appropriate
cables.

Take Apart DOS Compat. Logic Board - 31

Removing the Adapter

Adapter Board

Board

1 Disconnect the 26-pin

adapter board cable.

2 Gently lift up the battery

end of the adapter board
and disconnect the board
from the PDS slot.

Battery

3 Pull the adapter board

back and out.

26-Pin Adapter

Board Cable

Take Apart DOS Compat. Logic Board - 32

Sound Board

Phillips Screws

4 Removing the Sound

Board

5 Remove the two Phillips

screws.

6 Lift the sound board to

disconnect and remove it.

Take Apart DOS Compat. Logic Board - 33

Phillips Screw

16-pin External Video Out

Removing the DOS­Compatible Board

1 Disconnect the 16-pin

external video out cable
from the logic board.

2 Remove the four Phillips

screws from the DOS­compatible board.

DOS­Compatible

Board

Take Apart DOS Compat. Logic Board - 34

Caution:

compatible board is
installed directly into
the ‘040 processor
socket. Use extreme
caution not to bend the
processor pins when
you remove the DOS­compatible board from
the main logic board.

3 Gently loosen each side of

the DOS-compatible
board from the
processor socket.

4 Lift off the board.

Ê

the DOS-

Take Apart DOS Compat. Logic Board - 35

Replacement Note:

defective DOS-Compatible
board to Apple service with
the 68LC040 processor
installed.

Return a

Take Apart DOS Compat. Logic Board - 36

Note:

68LC040

Processor

Socket

To return the main
logic board to Apple,
remove the DRAM SIMM, the
standoffs, sound, adapter and

Main Logic

Board

DOS- compatible boards. In
addition, transfer the
68LC040 processor from
the DOS-compatible board to
the main logic board
processor socket.
Procedures for removing
and installing the 68LC040

DRAM SIMM

Standoffs

Standoff Nuts

(On Solder Side)

processor follow.

Take Apart DOS Compat. Logic Board - 37

Removing the Standoffs from the Main Logic Board

Remove the four standoff
nuts from the solder side of
the main logic board and lift
off the standoffs.

Take Apart DOS Compat. Logic Board - 38

Removing the
68LC040 from the

Processor Removal

Tool

DOS-Compatible
Board

DOS-Compatible

Board

68LC040

Processor

Caution:

processor pins are fragile.
To avoid bending the pins,
gently loosen the pins from
each side of the processor
and lift the processor
straight up. To avoid
scratching the tracings on
the logic board, avoid
contacting the logic board
with the processor removal
tool

The 68LC040

Take Apart DOS Compat. Logic Board - 39

1 Using the processor

removal tool, gently pry
up all four sides of the
680LC40 processor
from the DOS­compatible board.

2 Lift the processor

straight up and remove
it.

Take Apart DOS Compat. Logic Board - 40

Installing the
68LC040 processor in

Logic Board

the main logic board
socket.

Anti-static Foam

Processor

Socket

Caution:

procedure protects the EMI
clips and avoids warping the
logic board and thus harming
the tracings.

1 Support the processor

Ê

The following

socket area of the main
logic board with several
thicknesses of anti­static foam.

Take Apart DOS Compat. Logic Board - 41

Note:

Processor Alignment Corner

A missing pin and pin
socket hole mark the
alignment corners of the
68LC040 processor and
socket.

2 Locate the alignment

corners of the 68LC040
processor and the
processor socket.

Socket Alignment Corner

Take Apart DOS Compat. Logic Board - 42

Processor

Alignment

Corner

Socket

Alignment

Corner

Caution:

Avoid bending the
processor pins when you
install the 68LC040
processor. If you meet
resistance, realign the pins
and standoffs.

3 Carefully position the

processor alignment
corner over the socket
alignment corner.

4 Press the pins firmly

into the socket.

Take Apart Rear Panel - 43

Rear Panel

Rear Panel

No preliminary steps are
required before you begin
this procedure.

Take Apart Rear Panel - 44

1 Remove the two Phillips

screws.

2 Lift off the rear panel.

Screw

Screw

Take Apart Rear Panel - 45

Replacement Note:
Carefully align the flat tab
and the four hinge tabs.

Hinge Tabs

Flat
Tab

Take Apart Top Cover - 46

Top Cover

Top Cover

Before you begin, remove
the following:

• Drive bezel

• Rear panel

Review the ESD precautions
in Bulletins/Safety.

Note: The top cover consists
of two parts that must be
removed separately, a
plastic cover on top of a
metal shield.

Take Apart Top Cover - 47

1 Insert a small flat-

blade screwdriver into

Plastic Top Cover

the cutout and lift the
front edge to clear the
plastic stops.

2 With your other hand,

slide the plastic cover
forward about one-half
inch.

Cutout

3 Lift the plastic cover off

the metal shield.

Plastic Stops

Take Apart Top Cover - 48

4 Remove the two Phillips

screws.

Phillips Screw

Phillips Screw

Metal Shield

5 Slide the metal shield

toward the front of the
unit about one-half inch.

Take Apart Top Cover - 49

Security Wire

Metal Shield

Floppy Drive Cable

6 Lift the front edge of the

metal shield about an
inch.

7 Under the metal shield,

squeeze together the ends
of the floppy drive cable
security wire and
unhook it from the
metal shield.

8 Remove the security

wire from the floppy
drive cable.

9 Lift off the metal shield.

Take Apart Shield/Wiring Harness - 50

Shield/Wiring Harness

Before you begin, remove
the following:

• Drive bezel

• Drive security bracket

• Front panel control

• Floppy drive

• CD-ROM drive

• Hard drive

• I/O door

• Logic board

• Rear panel

• Top cover and shield

Shield/Wiring Harness

Review the ESD precautions
in Bulletins/Safety.

Take Apart Shield/Wiring Harness - 51

1 Push in and slide the

plastic side panels
toward the front of the
computer about one­half inch.

2 Remove the plastic side

panels.

Plastic Side Panel