Apple Macintosh Powermac Performa 630 Service Manual

K

Service Source

Macintosh Performa 630

Series

Macintosh Performa 630, 630CD, 631CD, 635CD,

636, 637CD, 638CD

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Service Source

Basics

Macintosh Performa 630 Series

Basics General Information - 1

General Information

The Macintosh Performa 630 Series computers are high­performance, low-cost modular computers with multimedia
features, based on the Motorola 68LC040 microprocessor.
The computers in this series are designed to accept a floppy
drive, a hard drive, and an optional CD-ROM drive.

User Controls

User controls include

• Soft power-on control from keyboard

• Front panel sound-control push buttons

• Optional infrared remote control

Basics General Information - 2

Internal Expansion Connections

Four types of expansion slots on the logic board include

• DRAM SIMM expansion slot (1 or 2 slots)

• LC PDS slot

• Communications slot for modems and Ethernet found on
LC 575

• 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 - 3

IDE (Intelligent Device Electronics)

The internal hard drive in the Performa 630 Series
computers 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 on the
Performa 630 Series.

Basics General Information - 4

Plastic Panel Design

Performa 630 Series computers are 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. You need to remove just one panel to reach
either the logic board or drives.

Simply remove the front plastic panel (the drive bezel) to
service all drives. Remove the plastic I/0 door to slide out
the logic board.

Basics Product Configuration - 5

Product Configuration

Performa 630

Memory: 4 MB of RAM

Storage: Internal Apple 1.4 MB SuperDrive, Internal 250
MB IDE hard drive

Display: 14-inch Apple Performa Display Plus

Modem: Teleport send-fax/data modem

Basics Product Configuration - 6

Performa 630CD

Memory: 8 MB of RAM

Storage: Internal Apple 1.4 MB SuperDrive, internal 250
MB IDE hard drive, internal AppleCD 300i Plus drive

Display: 14-inch Apple Performa Display Plus

Modem: Teleport send-fax/data modem

Basics Product Configuration - 7

Performa 635CD

Memory: 5 MB of RAM

Storage: Internal Apple 1.4 MB SuperDrive, internal 250
MB IDE hard drive, internal AppleCD 300i Plus drive

Display: 15-inch Apple Performa Display

Modem: Teleport send-fax/data modem

Basics Product Configuration - 8

Performa 636

Memory: 4 MB of RAM

Storage: Internal Apple 1.4 MB SuperDrive, internal 250
MB IDE hard drive

Display: 14-inch Apple Performa Display Plus

Modem: No modem included

Basics Product Configuration - 9

Performa 637CD

Memory: 8 MB of RAM

Storage: Internal Apple 1.4 MB SuperDrive, internal 250
MB IDE hard drive, internal Apple CD 300i Plus drive

Display: 15-inch Apple Performa Display

Modem: Teleport send-fax/data modem

TV Tuner Card installed

Video-in Card installed

Basics Product Configuration - 10

Performa 638CD

Memory: 8 MB of RAM

Storage: Internal Apple 1.4 MB SuperDrive, internal 250
MB IDE hard drive, internal Apple CD 300i Plus drive

Display: 15-inch Apple Performa Display

Modem: Teleport send-fax/data modem

TV Tuner Card installed

Video-in Card installed

Basics Rear View Diagram - 11

Rear View Diagram

TV Tuner

Access Cover

Monitor Port

Standby
Power
Button

Security
Lock Port

Power Socket

Basics I/O Door Diagram - 12

I/O Door Diagram

Video-In Card Access Cover

Communication Card
Access Cover

PDS Expansion Card
Access Cover

ADB Port

Printer Port

SCSI
Port

Modem Port

Sound Output Port

Sound Input Port

Basics Logic Board Diagram - 13

Logic Board

Video-In

Card

DRAM
SIMM
Slots

PDS Expansion

Card Slot

Communication

Card

Slot

Diagram

Note:

Some logic boards may
have only one DRAM SIMM
slot. The maximum
expandable DRAM is 36 MB
on logic boards with either
one or two SIMM slots.

Basics Shield/Wiring Harness - 14

Shield/Wiring

Power
Connector

26-Pin IR
Connector

40-Pin

IDE Connector

10-Pin

20-Pin
Floppy
Drive
Connector

TV Tuner Connector

DB-15 Video Connector

Monitor-Out

Daughterboard

4-Pin

CD

Audio

CD Connector

Harness

6-Pin
Header

to P/S

30-Pin

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Service Source

Specifications

Macintosh Performa 630 Series

Specifications Processor - 1

Processor

CPU

Addressing

Motorola 68LC040 microprocessor
33 MHz

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

Specifications Memory - 2

Memory

DRAM

DRAM Frame Buffer

ROM

4 MB built in
Expandable to 36 MB (if logic board has only one SIMM slot, part

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

Note:

See Basics chapter, “Product Configurations,” for specific

model configurations.

1 MB

1 MB

Specifications Memory - 3

VRAM

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

Performa 630 Series does not support video memory
expansion.

Specifications Disk Storage - 4

Disk Storage

Floppy Drive

CD-ROM Drive

Hard Drive

1.4 MB Apple SuperDrive Manual Insert

Optional Apple 300i Plus CD-ROM drive

250 MB IDE hard drive

Note:

Performa 630 Series computers do not support internal

SCSI hard drives.

Specifications I/O Interfaces - 5

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 - 6

Sound

Processor-Direct Slot

Communications Slot

Video-in Slot

TV Tuner

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

One 114-pin internal expansion slot for LC-compatible

processor-direct card

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

One 10-pin port for TV tuner card

Specifications I/O Interfaces - 7

Controls

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

Specifications I/O Devices - 8

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 microphone port on CPU

Specifications Sound and Video - 9

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 - 10

Electrical

Line V oltage

Frequency

Maximum Power

100–240 VAC

50–60 Hz

5 W, not including monitor

Specifications Physical - 11

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

Macintosh Performa 630 Series

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. Refer to Hardware/Memory manual.
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

Sound distortion with
MPEG board installed

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 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 - 5

Video

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

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

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

Troubleshooting Symptom Charts/Video

(Continued)

- 6

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

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

Video

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

1 If chip at location U12 on MPEG card displays number

2 If chip at location U12 on MPEG card does not display

(Continued)

341SO205, check all connections.

number 341SO205, replace MPEG card

Troubleshooting Symptom Charts/Video

(Continued)

- 7

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

Video

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

3 Reseat logic board.
4 Unplug 5.4 battery, wait 20 seconds, plug in battery, and

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.

(Continued)

keyboard. Verify that power-on connections of keyboard are

functioning by testing with known-good keyboard.

restart computer.

Troubleshooting Symptom Charts/Video (Continued) - 8

Video (Continued)

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

Troubleshooting Symptom Charts/Floppy Drive - 9

Floppy Drive

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

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

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.

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 10

Floppy Drive

Disk does not eject 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.

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.

(Continued)

Troubleshooting Symptom Charts/Hard Drive - 11

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 7.1.2P (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 - 12

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 - 13

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

(Continued)

- 14

Cursor moves, but
clicking mouse
button has no effect

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

Peripheral

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.

(Continued)

Troubleshooting Symptom Charts/Peripheral

(Continued)

- 15

No response to any
key on keyboard

Known-good
ImageWriter or
ImageWriter II does
not print

Peripheral

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

(Continued)

Troubleshooting Symptom Charts/Peripheral

(Continued)

- 16

Known-good
LaserWriter does not
print

Peripheral

1 Make sure that Chooser and Control Panel settings are

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

(Continued)

Troubleshooting Symptom Charts/Miscellaneous - 17

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
.

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Service Source

T ak e Apart

Macintosh Performa 630 Series

Take Apart Drive Bezel - 1

Drive Bezel

No preliminary steps are

Drive Bezel

LatchLatch

required before you begin
this procedure.

1 Locate the two latches

below the ridge on the
drive bezel.

Take Apart Drive Bezel - 2

2

Caution:

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

Insert a flat-blade
screwdriver at each
latch.

Screwdriver

3 Pry up to release each

latch.

Latch

Take Apart Drive Bezel - 3

4 Swing up the drive bezel

and pull it away from the
metal chassis.

Drive Bezel

Take Apart Front Panel Control - 4

Front Panel Control

Front Panel

Control

Before you begin, remove
the drive bezel.

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Front Panel Control - 5

Front Panel Control

Side Panel

Latch

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 - 6

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 - 7

4 Disconnect the front

panel control from the
ribbon cable.

Ribbon Cable

Front Panel

Control

Replacement Note:

Take
care not to crimp the cable
when you replace the front
panel control.

Take Apart Drive Security Bracket - 8

Drive Security Bracket

Before you begin, remove
the drive bezel.

Drive Security Bracket

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Drive Security Bracket - 9

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

Drive

Security

Bracket

Tab

Mounting Screw

TabTab

to correctly position the

Replacement Note:

Be sure

four tabs of the drive
security bracket.

Take Apart Floppy Drive - 10

Floppy Drive

Before you begin, remove
the following:

• Drive bezel

• Drive security bracket

Floppy Drive

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Floppy Drive - 11

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 - 12

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 - 13

CD-ROM Drive

Before you begin, remove
the following:

• Drive bezel

• Drive security bracket

CD-ROM Drive

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart CD-ROM Drive - 14

1

Note:

To perform this
step, you may want to
insert a screwdriver in

CD-ROM Drive

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

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 - 15

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.

4 Remove the four

CD Audio Adapter

mounting screws and
carrier from the CD-

SCSI Adapter

ROM drive.

Take Apart CD-ROM Drive - 16

Replacement Caution:

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

Take Apart Hard Drive - 17

Hard Drive

Before you begin, remove
the following:

• Drive bezel

• Security bracket

Hard Drive

Caution:

precautions in Bulletins/
Safety.

Note:

computers do not support
internal SCSI hard drives.
Refer to Basics for more
information on the IDE hard
drive interface.

Review the ESD

Performa 630

Take Apart Hard Drive - 18

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 - 19

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 - 20

I/O Door

No preliminary steps are
required before you begin
this procedure.

I/O Door

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart I/O Door - 21

1 Push down the two

locking tabs and swing
down the door.

Tab

Tab I/O Door

Take Apart I/O Door - 22

Hinge Tab

I/O Door

Hinge Tab

Hinge Tab

Replacement Note:

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

Take Apart Logic Board - 23

Logic Board

Before you begin, remove
the I/O door

Logic Board with Fence

Caution:

precautions in Bulletins/
Safety.

Note:

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.

Review the ESD

If you are replacing a

Take Apart Logic Board - 24

1 Remove the two screws

from the metal fence.

2

Note:

The logic-board-

Screw

and-fence assembly may
need a firm initial tug to

Logic Board
Fence

loosen it from the
shield/wiring harness.

Slide out the logic­board-and-fence-

Screw

Metal Fence

Logic Board

assembly.

Take Apart Logic Board - 25

Note:

Perform the

Logic Board

Phillips Screw

following steps only if you
are replacing a defective
logic board.

3 Remove the two Phillips

screws that secure the
fence to the solder side of

Torx Screw

the logic board.

Phillips Screw

Torx Screw

Connector

Logic Board Fence

SCSI

4 Using a T9 torx driver,

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

5 Separate the logic board

fence from the logic
board.

Take Apart Rear Panel - 26

Rear Panel

Rear Panel

No preliminary steps are
required before you begin
this procedure.

Take Apart Rear Panel - 27

1 Remove the two Phillips

screws.

2 Lift off the rear panel.

Screw

Screw

Take Apart Rear Panel - 28

Flat
Tab

Hinge Tabs

Replacement Note:

Carefully align the flat tab
and the four hinge tabs.

Take Apart Top Cover - 29

Top Cover

Top Cover

Before you begin, remove
the following:

• Drive bezel

• Rear panel

Caution:

precautions in Bulletins/
Safety.

Note:

of two parts that must be
removed separately—a
plastic cover on top of a
metal shield.

Review the ESD

The top cover consists

Take Apart Top Cover - 30

1 Insert a small flat-

blade screwdriver into
the cutout and lift the

Plastic
Top Cover

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 - 31

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 - 32

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 - 33

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

Take Apart Shield/Wiring Harness - 34

Plastic Side Panel

Caution:

Review the ESD
precautions in Bulletins/
Safety.

1 Push in and slide the

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

2 Remove the plastic side

panels.

Take Apart Shield/Wiring Harness - 35

3

Note:

This graphic
shows the bottom case
tipped to provide a
better view of the screw.
Perform this procedure
with the bottom case
seated on a firm, flat
surface.

Remove the screw that
secures the shield/

Screw

wiring harness to the
bottom case.

Shield/Wiring Harness

Take Apart Shield/Wiring Harness - 36

4 Disconnect:

2-Pin Speaker Cable

• 2-pin speaker cable

• 34-pin monitor-out

cable

Cable Holder

• 10-pin tuner cable,

if connected

5 Slide the tuner cable

from the cable holder.

10-Pin Tuner Cable

34-Pin

Monitor-Out

Cable

Take Apart Shield/Wiring Harness - 37

6 Release the latch on the

14-pin power supply
cable and disconnect the
cable.

7 Disconnect the 2-pin fan

cable.

8 Disconnect the 6-pin

header-to-power-

2-Pin

Fan Cable

supply cable and remove
the cable from the
routing notch in the
power supply case.

Latch

14-Pin

Power Supply Cable

6-Pin
Header-to-Power­Supply Cable

Take Apart Shield/Wiring Harness - 38

Logic
Board
Connector

CD-ROM

Shelf

Shield/Wiring Harness

Front
Panel

Control

Bay

9 Lift up one side of the

shield/wiring harness a
few inches, then lift up
the other side about an
inch.

10

Note: Guide the speaker
cable through the shield/
wiring harness as you
remove the harness.

Remove the shield/
wiring harness.

Take Apart Shield/Wiring Harness - 39

Replacement Note: In
rerouting the cables, do
not crimp cables
between the harness and
the floor or sides of the
bottom case. Route the
speaker cable between
the logic board connector
and the CD-ROM shelf.
Route the fan, power
supply, and header
cables to the side of the
front panel control bay.

Take Apart Shield/Wiring Harness - 40

Monitor-

Out

Cable

Video-In

Cable

Power Supply

Floppy Drive

Cable

Cable

IDE Data Cable

6-Pin

Header-to-

Power-Supply

Cable

Front Panel

Control

Cable

Hard
Drive
Power

Cable

Replacement Note: Arrange
the cables as shown before
replacing the shield/wiring
harness. When dressing the
cables, do not crimp them
between the harness and the
floor of the bottom case, or
between the harness and the
sides of the bottom case.
Route the speaker cable
between the logic board
connector and the CD-ROM
shelf. Route front panel
control, power supply, and
header cables to the side of
the front panel control bay.

Take Apart Shield/Wiring Harness - 41

Replacement Note:
Carefully position all six
tabs of the shield/wiring
harness.

Tab

Tab

Tab

Tab

Tab

Tab

Take Apart Fan/Video Card Bracket - 42

Fan/Video Card Bracket

Fan/Video Card
Bracket

Before you begin, remove
the following:

• Drive bezel

• I/O door

• Top cover and shield

Caution: Review the ESD
precautions in Bulletins/
Safety.

Take Apart Fan/Video Card Bracket - 43

1 Remove the two screws

from the logic board
metal fence.

Screw

Screw

Logic Board
Metal Fence

Take Apart Fan/Video Card Bracket - 44

2-Pin Speaker Cable

34-Pin

Monitor-Out

Cable

Cable Holder

10-Pin Tuner Cable

2 Disconnect:

• 2-pin speaker cable

• 34-pin monitor-out

cable

• 10-pin tuner cable,

if connected

3 Slide the tuner cable

from the cable holder.

Take Apart Fan/Video Card Bracket - 45

4 Disconnect the 2-pin fan

cable.

2-Pin

Fan Cable

Take Apart Fan/Video Card Bracket - 46

Fan/Video Card Bracket

5 Lift up one side of the

fan/video card bracket,
then the other.

6 Remove the fan/video

card bracket.

Take Apart Speaker - 47

Speaker

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

• Top cover and shield

• Shield/wiring harness

• Fan/video card bracket

Speaker

Take Apart Speaker - 48

Pull up on the speaker to
disengage it from its hook­and-loop connection.

Speaker

Take Apart Power Supply - 49

Power Supply

Power Supply

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

• Top cover and shield

• Shield/wiring harness

• Fan/video card bracket

Take Apart Power Supply - 50

Power Supply

Remove the screw from the
power supply and lift the
power supply from the
bottom case.

Screw

Take Apart Bottom Case - 51

Bottom Case

To remove the bottom case,
remove the following:

• Drive bezel

• Drive security bracket

• Front panel control

• Floppy drive

• CD-ROM drive

• Hard drive

• I/O door

• Logic board

• Top cover and shield

Bottom Case

• Shield/wiring harness

• Fan/video card bracket

• Speaker

• Power supply

K

Service Source

Upgrades

Macintosh Performa 630 Series

Upgrades Processor Upgrade - 1

Processor

Macintosh Processor Upgrade
(including 256K Cache Card)

Upgrade

Before you begin, remove
the following:

• I/O door

• Logic board

• Card in PDS slot (if any)

Caution:

precautions in Bulletins/
Safety.

The Macintosh Processor
Upgrade kit allows 68LC040
computers to switch between
a PowerPC 601 processor
and a 68LC040 processor.

Review the ESD