Apple Macintosh Quadra Centris 605 Service Manual

Page 1
K
Service Source
Macintosh LC Series/
Quadra 605
Macintosh LC, Macintosh LC II,
Macintosh Quadra 605
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K
Service Source

Basics

Macintosh LC Series/Quadra 605
Page 3
Basics Overview - 2

Overview

This manual includes complete repair procedures for the Macintosh LC Series/ Quadra 605, shown at left.
Figure: Macintosh LC Series, Quadra 605
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K
Service Source
Specifications
Macintosh LC Series/Quadra 605
Page 5
Specifications Introduction - 1

Introduction

Specifications information for this product can be found in this chapter and also in the
Spec Database, which you can access in one of three ways:
— Launch it directly by double-clicking the Apple Spec Database runtime alias at the top
level of the Main Service Source CD. — Select "Apple Spec Database" from the Service Source drop-down main menu. — Click the Acrobat toolbar icon for the database, which is near the right end of the
toolbar with the letters "SP."
Page 6
Specifications Processor - 2

Processor

LC

LC II

LC III

Motorola 68020 microprocessor 16 MHz 16-bit internal data bus
Motorola 68030 microprocessor 16 MHz 16-bit internal data bus Burst-mode RAM access
Motorola 68030 microprocessor 25 MHz 32-bit internal data bus Burst-mode RAM access Coprocessor socket
Page 7
Specifications Processor - 3

LC 475/Quadra 605

Motorola 68LC040 microprocessor 25 MHz 32-bit internal data bus Burst-mode RAM access
Page 8
Specifications Memory - 4

Memory

DRAM

ROM
LC: 2 MB, expandable to 10 MB (100 ns or faster SIMMs) LC II: 4 MB standard, expandable to 10 MB (100 ns or faster
SIMMs)
LC III: 4 MB standard, expandable to 36 MB (80 ns or faster
SIMMs)
LC 475/Quadra 605: 4 MB or 8 MB standard, expandable to 36
MB (80 ns or faster SIMMs)
LC/LC II: 512 K LC III/LC 475/Quadra 605: 512K expandable to 1 MB
Page 9
Specifications Memory - 5

VRAM

LC: 256K VRAM, upgradable to 512K LC II: 256K VRAM SIMM, upgradable to 512K LCIII: 512K VRAM on board, upgradable to 768K LC 475/Quadra 605: Two 256K VRAM SIMMs, upgradable to 1MB
Page 10
Specifications Disk Storage - 6

Disk Storage

Floppy Drive

Hard Drive

LC/ LC II/ LC III: Apple SuperDrive 1.4 MB Floppy Disk Drive Optional second internal 1.4 MB floppy drive (LC only) LC 475/Quadra 605: Apple SuperDrive 1.4 MB Floppy Disk Drive
or Apple SuperDrive Manual Insert Floppy Disk Drive
LC: 40 MB or 80 MB LC II: 40 MB, 80 or 160 MB LC III: 40, 80 or 160 MB LC 475/Quadra 605: 160 or 230 MB
Page 11
Specifications I/O Interfaces - 7

I/O Interfaces

Serial

SCSI

Apple Desktop Bus

Video

Sound

Two RS-232/RS-422 serial ports; mini DIN-8 connectors
SCSI interface; DB-25 connector
One ADB port; mini DIN-4 connector
One DB-15 monitor port for built-in video; DA-15 connector
LC/LC II/LC III: Mono sound input and output port; mini phono
plug
LC 475/Quadra 605: Mono sound input port; stereo output; mini
phono plug
Page 12
Specifications I/O Interfaces - 8

Expansion Connector

LC: 96-pin processor-direct slot (PDS) supporting 020 direct
slot expansion card
LC II: 96-pin PDS supporting 020/030 direct slot expansion
card
LC III: 114-pin PDS supporting 020/030 direct slot expansion
card
LC 475/Quadra 605: 114-pin expansion slot supporting 030/
040 expansion cards. Accepts Macintosh LC compatible I/O display, network, and video capture cards. Does not support 030 processor accelerator or cache cards.
Page 13
Specifications I/O Devices - 9

I/O Devices

Keyboard

Mouse

Microphone

Apple Keyboard, Apple Keyboard II, Apple Extended Keyboard II,
or Apple Adjustable Keyboard connected through ADB ports (mini DIN-4)
ADB mouse and ADB Mouse II connected through ADB ports (mini
DIN-4)
Electret, omnidirectional Operates on 8 VDC supplied by microphone port on CPU
Page 14
Specifications Sound and Video - 10

Sound and Video

Sound

Video

Monaural, 8-bit sound input at 11 or 22 kHz LC, LC II, LC III: Monophonic, 8-bit sound generator supplying
same signal to both channels of stereo equipment
LC 475 and Quadra 605: Stereo output capability
LC and LC II provide built-in support for many monitors,
including
• Apple High-Resolution Monochrome Monitor
• AppleColor High-Resolution RGB Monitor
• Macintosh 12-Inch RGB Display
• Macintosh 12-Inch Monochrome Display
• Macintosh Color Display
• Apple Basic Color Monitor
Page 15
Specifications Sound and Video - 11

Video (cont’d)

LC III, LC 475 and Quadra 605 provide up to 16-bit support on
12-, 13-, and 16-inch monitors and 8-bit support on 15­inch portrait and 21-inch monitors. LC III, LC 475 and Quadra 605 support all Apple monitors available at CPU introduction dates, including
• Apple High-Resolution Monochrome Monitor
• AppleColor High-Resolution RGB Monitor
• Macintosh 12-Inch RGB Display
• Macintosh 12-Inch Monochrome Display
• Macintosh Color Display
• Apple Basic Color Monitor
• Macintosh 16-Inch Color Display (Macintosh LC III only)
LC III, LC 475 and Quadra 605 support NTSC and PAL.
Page 16
Specifications Electrical - 12

Electrical

Line V oltage

Frequency

Maximum Power

100–240 VAC, automatically configured
LC Series: 47–63 Hz Quadra 605: 50–60 Hz
LC/LC II: 50 W (not including monitor) LC III: 30 W Quadra 605: 26 W
Page 17
Specifications Physical - 13

Physical

Dimensions

Weight

Height: 3.0 in. (7.7 cm) Width: 12.2 in. (31.0 cm) Depth: 15.0 in. (38.2 cm)
8.8 lb. (4.0 kg)
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K
Service Source

Troubleshooting

Macintosh LC Series/Quadra 605
Page 19
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.
Page 20
Troubleshooting Symptom Charts/Error Chords - 2

Symptom Charts

Error Chords

Error chord sounds during startup (Macintosh LC)
Eight-tone error chord sounds during startup (LC II/III/ 475/Quadra 605)
1 Replace SIMMs. 2 Perform SIMM verification on replacement logic board. 3 Replace logic board. Retain customer’s SIMMs.
1 Replace SIMMs. 2 Perform SIMM verification on replacement logic board. 3 Replace logic board. Retain customer’s SIMMs.
Page 21
Troubleshooting Symptom Charts/Error Chords
(Continued)
- 3
Four-tone error chord sounds during startup (Macintosh LC II)
Error Chords
1 Disconnect hard drive power cable and hard drive data 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.
(Continued)
Page 22
Troubleshooting Symptom Charts/Built-in Video - 4

Built-in 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 Adjust brightness on monitor. 2 Try monitor with another Macintosh computer. 3 Check battery. 4 Replace monitor. Troubleshoot defective monitor. See
Symptom Charts in appropriate monitor manual. 5 Replace video cable. 6 Replace VRAM SIMM. 7 Replace logic board. Retain customer’s SIMMs. 8 Replace power supply.
1 Remove expansion card, if present. 2 Remove peripherals. 3 Disconnect hard drive and floppy drive. 4 Replace SIMMs. Refer to Memory manual. 5 Replace logic board. Retain customer’s SIMMs. 6 Replace power supply.
Page 23
Troubleshooting Symptom Charts/Built-in Video
(Continued)
- 5
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
Built-in Video
1 Verify monitor works with another Macintosh. 2 Replace video cable. 3 Replace monitor. 4 Replace logic board. Retain customer’s SIMMs.
1 Plug monitor directly into wall socket. Verify that monitor
has power. 2 Remove expansion card, if present. 3 Remove peripherals. 4 Disconnect hard drive and floppy drive. 5 Replace power supply. 6 Replace logic board. Retain customer’s SIMMs.
(Continued)
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Troubleshooting Symptom Charts/Built-in Video
(Continued)
- 6
Vertical lines, horizontal lines, or snow appears on screen, or screen is completely dark; startup tone is normal
Built-in Video
1 Verify monitor works with another Macintosh. 2 Replace video cable. 3 Replace monitor. 4 Replace VRAM SIMM. 5 Replace logic board. Retain customer’s SIMMs. 6 Replace power supply.
(Continued)
Page 25
Troubleshooting Symptom Charts/Floppy Drive - 7

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 Replace floppy drive cable. 2 Replace floppy drive. 3 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 Remove top cover. 3 Eject disk manually by pushing opened paper clip into hole
beside drive slot. 4 Replace floppy drive cable. 5 Replace floppy drive.
Page 26
Troubleshooting Symptom Charts/Floppy Drive
(Continued)
- 8
Drive attempts to eject disk, but doesn’t
Floppy Drive
1 Push disk completely in. 2 Eject disk manually by pushing opened paper clip into hole
beside drive slot. 3 Check that cover is completely on. 4 Replace floppy drive.
(Continued)
Page 27
Troubleshooting Symptom Charts/Hard Drive - 9

Hard Drive

Internal hard drive runs continuously
Internal hard drive does not operate
1 Make sure System is version 6.0.7 (or later) for Macintosh
LC, version 7.0.1 (or later) for Macintosh LC II, or version
7.1 (or later) for LC III/475 and Quadra 605. 2 Replace hard drive cable. 3 Replace internal hard drive. 4 Replace logic board. Retain customer’s SIMMs.
1 Replace hard drive data cable. 2 Replace hard drive power cable. 3 Replace internal hard drive. 4 Replace logic board. Retain customer’s SIMMs.
Page 28
Troubleshooting Symptom Charts/Peripherals - 10

Peripherals

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. 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.
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 any ADB port, replace mouse. 5 Remove additional PDS cards. 6 Reset PRAM. 7 Replace logic board. Retain customer’s SIMMs.
Page 29
Troubleshooting Symptom Charts/Peripherals
(Continued)
- 11
Cursor moves, but clicking mouse button has no effect
Double-click doesn’t open application, disk, or server
Peripherals
1 Replace mouse. 2 Replace logic board. Retain customer’s SIMMs.
1 Remove extra system files on 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
<Command> <Option> <Shift> keys and select Control Panel
from Apple menu. 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 any ADB port, replace mouse. 5 Replace logic board. Retain customer’s SIMMs.
(Continued)
Page 30
Troubleshooting Symptom Charts/Peripherals
(Continued)
- 12
No response to any key on keyboard
Peripherals
1 Make sure System is version 6.0.7 (or later) for Macintosh
LC, version 7.0.1 (or later) for Macintosh LC II, or version
7.1 (or later) for LC III/475 and Quadra 605. 2 Check keyboard connection to ADB port. 3 Replace keyboard cable. 4 Replace keyboard. 5 Remove battery for 15 to 30 minutes to reset logic board. 6 Replace logic board. Retain customer’s SIMMs.
(Continued)
Page 31
Troubleshooting Symptom Charts/Peripherals
(Continued)
- 13
Known-good LaserWriter does not print
Known-good ImageWriter or ImageWriter II does not print
Peripherals
1 Make sure that Chooser and Control Panel settings are
correct.
2 Make sure System is version 6.0.7 (or later) for Macintosh
LC, version 7.0.1 (or later) for Macintosh LC II, or version
7.1 (or later) for LC III/475 and Quadra 605. 3 Reset PRAM.
1 Make sure that Chooser and Control Panel settings are
correct.
2 Make sure System is version 6.0.7 (or later) for Macintosh
LC, version 7.0.1 (or later) for Macintosh LC II, or version
7.1 (or later) for LC III/475 and Quadra 605. 3 Check printer DIP switches. 4 Reset PRAM. 5 Replace printer interface cable. 6 Replace logic board. Retain customer’s SIMMs.
(Continued)
Page 32
Troubleshooting Symptom Charts/Miscellaneous - 14

Miscellaneous

Clicking, chirping, or thumping
System shuts down or restarts intermittently
1 Disconnect hard drive. Replace drive if noise disappears. 2 Replace power supply. 3 Replace logic board. Retain customer’s SIMMs.
1 Make sure air vents on back and top of case are unobstructed.
Thermal protection circuitry may shut down computer. After
30 to 40 minutes, system should be OK. 2 Replace power cable. 3 Install standoffs on LC Ethernet Card, if present. 4 Replace power supply. 5 Replace SIMMs. Refer to Memory manual. 6 Replace logic board. Retain customer’s SIMMs.
Page 33
Troubleshooting Symptom Charts/Miscellaneous
(Continued)
- 15
System intermittently crashes or locks up
No sound from speaker
Miscellaneous
1 Make sure System is version 6.0.7 (or later) for Macintosh
LC, version 7.0.1 (or later) for Macintosh LC II, or version
7.1 (or later) for LC III/475 and Quadra 605. 2 Make sure software is known-good. 3 Replace logic board. Retain customer’s SIMMs. 4 Replace SIMMs. 5 Replace power supply.
1 Verify that volume setting in Control Panel is 1 or above. 2 Reset PRAM. 3 Verity nothing is connected to sound-out port. 4 Replace speaker. 5 Replace logic board. Retain customer’s SIMMs.
(Continued)
Page 34
Troubleshooting Symptom Charts/Miscellaneous
(Continued)
- 16
System seems to boot, then message “Finder is old version” displays
System intermittently doesn’t power on
Miscellaneous
1 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 <Command> <Option> <Shift> keys and select Control Panel from Apple menu.
2 Replace logic board. Retain customer’s SIMMs.
1 Check cables. 2 Plug monitor directly into wall socket. Verify that monitor
has power. 3 Try known-good keyboard and ADB cable. 4 Replace power cord. 5 Check batteries. See “Battery Verification” in Additional
Procedures. 6 Replace logic board. Retain customer’s SIMMs.
(Continued)
Page 35
Troubleshooting Symptom Charts/Miscellaneous
(Continued)
- 17
Monitor raster width too narrow
Stand-alone system hangs or crashes
Miscellaneous
Refer to Adjustments section in the appropriate monitor manual for horizontal size (width) adjustment.
1 If using an older LC Ethernet card with a computer running
System 7, disable virtual memory. 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
<Command> <Option> <Shift> keys and select Control Panel
from Apple menu. 3 Upgrade to latest revision of software. 4 Remove additional RAM and PDS card. 5 Replace logic board
(Continued)
Page 36
Troubleshooting Symptom Charts/Miscellaneous
(Continued)
- 18
Miscellaneous
Networked 33 MHz LC III freezes
Clock doesn’t run 1 Replace battery. See “Battery Replacement” in Additional
System doesn’t recognize more than 10 MB of RAM (LC/LC II)
1 Verify 10Base-T cable is secure. 2 Replace 10Base-T adapter card. 3 Remove additional RAM and external SCSI devices. 4 Replace logic board.
Procedures. 2 Reset PRAM. 3 Verify nothing is connected to sound-out port. 4 Replace logic board. Retain customer’s SIMMs.
Although you can install up to12 MB of RAM in Macintosh LC/LC II computers, 10 MB is the maximum amount of RAM that the system recognizes.
(Continued)
Page 37
K
Service Source

T ak e Apart

Macintosh LC Series/Quadra 605
Page 38
Take Apart Top Cover - 1
Quadra 605
LC/LC II/LC III/ LC 475

Top Cover

No preliminary steps are required before you begin this procedure.
1 Remove the case screw if
one is present.
2 Lift the tabs at the back
of the lid.
3 Lift the top cover
straight up.
Page 39
Take Apart Hard Drive - 2

Hard Drive

Before you begin, remove
Hard Drive
the top cover.
Caution:
precautions in Bulletins/ Safety.
Review the ESD
Page 40
Take Apart Hard Drive - 3
Hard Drive Power Cable
Hard Drive Power Connector
Hard Drive
Data Cable
1 Release the locking tab
and disconnect the hard drive power cable from the connector on the logic board.
2 Disconnect the hard
drive data cable from the connector on the logic board.
Hard Drive Data Cable Connector
Page 41
Take Apart Hard Drive - 4
3 Release the two plastic
latches on one side of the hard drive and lift the drive slightly. Repeat on the other side of the drive and remove the drive (with carrier) from the computer.
Replacement Note:
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.
For
Page 42
Take Apart Fan/Speaker Assembly (LC) - 5

Fan/Speaker Assembly (LC)

Fan/Speaker
Assembly
Before you begin, remove the top cover.
Caution:
precautions in Bulletins/ Safety.
Review the ESD
Page 43
Take Apart Fan/Speaker Assembly (LC) - 6
1 Release the latch on one
Latch
end of the fan/speaker assembly, and lift the assembly slightly.
Latch
2 Release the other latch
and remove the fan/ speaker assembly from the bottom case.
Page 44
Take Apart Fan (LC II/III) - 7

Fan (LC II/III)

Before you begin, remove the top cover.
Fan
Caution:
precautions in Bulletins/ Safety.
Review the ESD
Page 45
Take Apart Fan (LC II/III) - 8
1 Disconnect the fan cable
from the fan connector on the logic board.
Fan Cable
Fan Connector
Latch
Latch
2 Release the plastic
latches and lift the fan from the case.
Replacement Caution:
Be sure to install the fan with the logo side down, or the fan may damage the computer.
Page 46
Take Apart Speaker (LCII/III) - 9

Speaker (LCII/III)

Before you begin, remove the following:
Speaker
• Top cover
• Hard drive
Caution:
precautions in Bulletins/ Safety.
Review the ESD
Page 47
Take Apart Speaker (LCII/III) - 10
1 Disconnect the speaker
cable from the speaker connector on the logic board.
Speaker Cable
Speaker Connector
Latch
Speaker
Latch
2 Release the plastic
latches and lift the speaker from the case.
Replacement Note:
Before reconnecting the speaker cable, thread it through the top two brackets that hold the hard drive in place.
Page 48
Take Apart Floppy Drive - 11

Floppy Drive

Before you begin, remove
Floppy Drive
the top cover.
Caution:
precautions in Bulletins/ Safety.
Review the ESD
Page 49
Take Apart Floppy Drive - 12
Floppy Drive Cable
Floppy Drive Cable Connector

Macintosh LC

1 Disconnect the floppy
drive cable from the connector on the logic board.
Note:
Retain the old floppy drive cable. Use the old cable on the new exchange module.
2 Release the two latches
on one side of the drive and lift the drive slightly. Repeat on the other side and remove the drive from the case.
Page 50
Take Apart Floppy Drive - 13
Replacement Note:
you install a replacement
1.4 MB SuperDrive, you must remove the dust shield.
Before
Page 51
Take Apart Floppy Drive - 14

LC II/LC III/Quadra 605

Floppy Drive
Connector
Latch
Latch
Floppy
Drive
1 Disconnect the floppy
drive cable from the connector on the logic board.
2 Release the two latches
at the rear of the floppy drive and remove the drive from the case.
Replacement Note:
you install a replacement auto-inject 1.4 MB SuperDrive, you must remove the dust shield, if present.
Before
Page 52
Take Apart Floppy Drive - 15
Replacement Note:
encounter either an Apple SuperDrive or a manual eject floppy drive in some models. Replace floppy drives like for like.
You may
Page 53
Take Apart Power Supply - 16

Power Supply

Before you begin, remove the top cover.
Power Supply
Caution:
precautions in Bulletins/ Safety.
Review the ESD
Page 54
Take Apart Power Supply - 17
1 Disconnect the power
supply cable from the connector on the logic board.
Power Supply Cable
Power Supply Connector
2 Release the two latches
that secure the front end of the power supply to the bottom case, and lift the power supply out of the case.
Page 55
Take Apart Logic Board - 18

Logic Board

Before you begin, remove the following:
• Top cover
• Fan/speaker assembly (LC)
• Fan (LC II/III/475 and Quadra 605)
Logic Board
Caution:
precautions in Bulletins/ Safety.
Review the ESD
Page 56
Take Apart Logic Board - 19
1 Disconnect the following
Power Supply Cable
cable connectors from the logic board:
Floppy Drive Cable
• Hard drive power cable
• Hard drive data cable
Fan Cable
Speaker Cable
• Floppy drive cable
• Power supply cable
• Fan cable (LC II/III/
Hard Drive Data Cable
LC 475 and Quadra
605)
• Speaker cable (LC II/ III/LC 475 and
Hard Drive Power Cable
Expansion Connector
Expansion Card
Quadra 605)
2 Remove the expansion
card (if installed).
Page 57
Take Apart Logic Board - 20
Caution:
be sure the power on/off button clears the rear panel before you remove the logic board. While lifting the board, do not touch any components or connectors on the back of the logic board. (The oil from your skin can harm the connectors.)
In the next step,
Page 58
Take Apart Logic Board - 21
3 Using your forefingers,
spread the two latches that secure the logic board to the bottom case. At the same time, using
Latch
your right thumb, push on the expansion connector and slide the logic board toward the front of the case.
Latch
Expansion Connector
Page 59
Take Apart Logic Board - 22
4 Gently lift the board
from the case.
Replacement Note:
the SIMMs from the defective logic board and install them on the replacement logic board.
Remove
Page 60
Take Apart Logic Board - 23
Quadra 605 Logic Board
J18
Jumper
5 Remove the jumper from
the pins at location J18 on the defective board.
Replacement Note:
The LC 475 and Quadra 605 use the same logic board replacement. The Quadra 605 requires a jumper to connect the pins at location J18. Quadra 605 service replacement logic boards do not include the jumper.
Page 61
Take Apart Logic Board - 24
Quadra 605 Logic Board
6 Install a jumper on the
pins at location J18 on the Quadra 605 service replacement logic board.
Jumper
J18
Page 62
Take Apart Logic Board - 25
Grounding Pad
Foam
Connecting
Grounding Spring
Replacement Note:
The replacement logic boards for the LC 475 and the Quadra 605 do not include grounding connectors. You must remove the grounding connector from the defective board and install it on the replacement board.
There are two versions of grounding connectors, a foam grounding pad and a connecting grounding spring. You may encounter either version on LC 475 and Quadra 605 logic boards.
Page 63
Take Apart Logic Board - 26
Foam Grounding
Pad
Connecting
Grounding Spring
Audio Ports
Rough Side Out
Audio Ports
7 Install the foam
grounding pad on the audio ports of the replacement logic board with the rough side of the pad facing out.
8 Install the connecting
grounding spring on the audio ports of the replacement logic board with the arms of the spring facing out.
Spring Arms Out
Page 64
K
Service Source

Upgrades

Macintosh LC Series/Quadra 605
Page 65
Upgrades LC Ethernet Upgrade - 1

LC Ethernet Upgrade

Before you begin, remove the top cover.
LC Ethernet Card
Caution:
precautions in Bulletins/ Safety.
Note:
Ethernet Card package includes the LC Ethernet Card and standoffs. If you order service parts, you must order the standoffs separately from the card.
Review the ESD
The finished goods LC
Page 66
Upgrades LC Ethernet Upgrade - 2
1 Insert the short standoff
in the hole on the corner near the connector end of
Long Standoff
the card.
2 Insert the long standoff
in the hole on the center edge of the card.
Short Standoff
Caution:
Failure to install the standoffs can cause the computer to restart intermittently.
Page 67
Upgrades LC Ethernet Upgrade - 3
LC Ethernet Card
LC Ethernet Card
External Connector
3 Position the card so that
the external connector extends through the expansion connector opening.
4 Pivot the card over the
expansion slot.
5 Press the connector
pins into the connector slot.
Note:
Do not force the card into the slot. If you meet a lot of resistance, pull the card out and reseat it.
Page 68
Upgrades LC II Upgrade - 4

LC II Upgrade

Before you begin, remove the following:
Macintosh LC Logic Board
• Top cover
• Fan/speaker assembly
• Logic board
Caution:
precautions in Bulletins/ Safety.
Note:
upgrade kit upgrades a Macintosh LC to a Macintosh LC II. The upgrade kit includes a Macintosh LC II logic board and cover.
Review the ESD
A Macintosh LC II
Page 69
Upgrades LC II Upgrade - 5
1 Install the Macintosh LC
II logic board.
Macintosh LC II Logic Board
2 Install the customer’s
SIMMs into the new logic board.
Page 70
Upgrades LC II Upgrade - 6
Sound-Out Port
Sound Input Port
Replacement Note:
After replacing the fan/speaker assembly, install the Macintosh LC II top cover.
Make sure that the connections to the sound­out and sound input ports are correct. Inserting equipment into the wrong port can damage the computer or equipment.
Page 71
Upgrades LC to LC III Upgrade - 7

LC to LC III Upgrade

Before you begin, remove
Macintosh LC III Upgrade
the following:
• Top cover
• Fan/speaker assembly
• Floppy drive
• Logic board
Caution:
precautions in Bulletins/ Safety.
Review the ESD
Page 72
Upgrades LC to LC III Upgrade - 8
Note:
A Macintosh LC III upgrade kit includes LC III logic board, bottom case, top cover, power supply, speaker, fan, and floppy drive carrier.
Note:
You will use only a few parts from the original LC in upgrading an LC to an LC III. The following procedures explain how to remove the LC parts and install them into the LC III upgrade unit.
Page 73
Upgrades LC to LC III Upgrade - 9
1 Remove the Macintosh LC
floppy drive and floppy drive cable. (See “Floppy Drive” in Take Apart.)
2 Remove the floppy drive
and cable from the LC
LC Floppy Drive Carrier
Floppy Drive Cable Apple 1.4 MB SuperDrive
floppy drive carrier.
Page 74
Upgrades LC to LC III Upgrade - 10
3 Install the floppy drive
with cable into the LC III floppy drive carrier.
LC III Upgrade Floppy
Drive Carrier
Apple 1.4 MB SuperDrive
Floppy Drive Cable
Page 75
Upgrades LC to LC III Upgrade - 11
4 Install the floppy drive
1.4 MB SuperDrive in
LC III Upgrade Carrier
into the floppy drive bay of the LC III upgrade bottom case.
5 Connect the floppy drive
cable to the floppy drive connector on the logic board.
LC III Floppy Drive Bay
Floppy Drive Cable Connector
LC III Bottom Case
Replacement Note:
If you are installing a replacement auto-inject 1.4 MB SuperDrive, you must remove the dust shield, if present.
Page 76
Upgrades LC to LC III Upgrade - 12
6 Remove the Macintosh LC
Hard Drive
Data Cable
LC Hard Drive with Carrier
hard drive with carrier, hard drive data cable, and hard drive power cable. (See “Hard Drive” in Take Apart.)
7 Install the LC hard drive
into the hard drive bay of the LC III upgrade
LC III Hard Drive Bay
Hard Drive
Power Cable
bottom case.
8 Connect the hard drive
data cable and hard drive power cable connectors to the connectors on the LC III upgrade logic board.
LC III Bottom Case
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Upgrades LC to LC III Upgrade - 13
9 Install the LC VRAM
SIMMs and the expansion card (if present) into the LC III upgrade logic board.
Note:
DRAM SIMMs from an LC are not compatible with the LC III.
10 Attach the top cover.
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Upgrades LC II to LC III Upgrade - 14

LC II to LC III Upgrade

Before you begin, remove
Macintosh LC III Upgrade
the top cover.
Caution:
precautions in Bulletins/ Safety.
Review the ESD
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Upgrades LC II to LC III Upgrade - 15
Note:
A Macintosh LC III upgrade kit upgrades a Macintosh LC II to a Macintosh LC III. The upgrade kit includes a Macintosh LC III logic board, top cover, fan, speaker, and a floppy drive carrier. When upgrading an LC II to an LC III, you will need only the LC III logic board.
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Upgrades LC II to LC III Upgrade - 16
1 Install the Macintosh LC
III logic board. (See Take Apart chapter.)
Macintosh LC III Logic Board
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Upgrades LC II to LC III Upgrade - 17
2 Install the fan and new
Macintosh LC III top cover (see Take Apart chapter).
Sound-Out Port
Sound Input Port
Replacement Caution:
Make sure that the connections to the sound-out and sound input ports are correct. Inserting equipment into the wrong port can damage the computer or equipment.
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Upgrades LC 475 Logic Board Upgrade - 18

LC 475 Logic Board Upgrade

Macintosh LC II or III
Logic Board
Before you begin, remove the following:
• Top cover
• Fan
• Logic board
Caution:
precautions in Bulletins/ Safety.
Review the ESD
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Upgrades LC 475 Logic Board Upgrade - 19
Note:
A Macintosh LC 475 upgrade kit upgrades a Macintosh LC II or III to a Macintosh LC 475. The upgrade kit includes a Macintosh LC 475 logic board and product ID labels.
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Upgrades LC 475 Logic Board Upgrade - 20
1
Note:
The upgrade kit does not include a connecting grounding spring. You must order
Audio Ports
this part separately.
Before installing the upgrade logic board, install the connecting grounding spring on the audio ports of the board, with the arms of the spring facing out.
Connecting Grounding Spring
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Upgrades LC 475 Logic Board Upgrade - 21
2 Install the Macintosh LC
475 logic board.
Macintosh LC 475 Logic Board
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Upgrades LC 475 Logic Board Upgrade - 22
3 Install the fan and top
cover (see Take Apart chapter).
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Upgrades Macintosh Processor Upgrade - 23
Macintosh
Macintosh Processor Upgrade (including 256K Cache Card)
Processor Upgrade
Before you begin, remove the following:
• Top cover
• I/O door
• Logic board
• Card in the PDS slot (if any)
Caution:
precautions in Bulletins/ Safety.
Review the ESD
Page 88
Upgrades Macintosh Processor Upgrade - 24
Note:
Macintosh Processor
Upgrade with
256K Cache Card
Hook-and-Loop
Fasteners
The Macintosh Processor Upgrade kit allows 68LC040 computers to switch between a PowerPC 601 processor and a 68LC040 processor. The upgrade board includes
040 Heat
Sink
the PowerPC 601 processor on board and a socket to accept the customer’s 68LC040 processor.
Note:
Refer to the Macintosh Processor Upgrade manual under the Power Macintosh
256K Cache
Card
Spacer
Processor Removal Tool
menu for information about specifications and troubleshooting.
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Upgrades Macintosh Processor Upgrade - 25
Note:
The Macintosh Processor Upgrade comes packaged with the Macintosh Processor Upgrade board, 256K cache card, 040 heat sink, and hook-and-loop fasteners. If you need to order service replacement parts, order the parts separately.
Note:
To install the upgrade, you will need a processor removal tool. Order the removal tool as a separate service part.
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Upgrades Macintosh Processor Upgrade - 26
Note:
The cache card comes installed on the upgrade board.
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Upgrades Macintosh Processor Upgrade - 27

Installation Procedure Overview

There are three basic steps to installing the Macintosh Processor Upgrade on LC 475 and Quadra 605 computers.
• Remove the 68LC040
processor from the customer’s logic board
• Install the 68LC040
processor on the upgrade board
• Install the upgrade board
on the logic board
Detailed procedures follow.
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Upgrades Macintosh Processor Upgrade - 28
1 Locate the 68LC040
processor on the logic board.
2 Remove the 68LC040
processor from the logic board
68LC040 Processor
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Upgrades Macintosh Processor Upgrade - 29
Note:
Processor
This graphic shows the proper way to remove any 68LC040 chip from its logic board. Your logic board may differ somewhat from this graphic
3 Position the teeth of the
processor removal tool in the groove between the processor and the logic board socket.
Processor
Removal Tool
Processor Socket
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Upgrades Macintosh Processor Upgrade - 30
Caution:
up on the handle of the processor removal tool. Pressing down could damage components on the logic board.
Caution:
side of the processor only slightly to avoid bending the pins.
4 Gently lift up the
processor removal tool handle and pry up each side of the processor from the socket.
5 Remove the processor.
Be sure to lift
Pry up each
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Upgrades Macintosh Processor Upgrade - 31
Install the 68LC040 Processor on the Upgrade Board
Alignment Corners
Spacer
68LC040 Processor
Note:
The alignment corner of the 68LC040 processor is missing one pin. The alignment corner of the spacer is missing a pin hole.
1 Position the spacer
alignment corner over the 68LC040 processor alignment corner
2 Place the spacer on the
processor.
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Upgrades Macintosh Processor Upgrade - 32
68LC040 Processor
Caution:
Forcing the 68LC040 processor connector pins into the socket could damage the pins. If the processor resists installation, check the pin alignment.
Caution:
Place the upgrade board on a firm even surface to avoid bending the upgrade board when pressing the processor into the socket.
Caution:
Use two thumbs to evenly distribute the pressure as you press the processor into the socket.
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Upgrades Macintosh Processor Upgrade - 33
3 Hold the processor and
spacer together and position the spacer alignment corner over the upgrade socket alignment corner.
4 Press the processor
connector pins into the socket until you hear a “snap.”
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Upgrades Macintosh Processor Upgrade - 34
Note:
On a correctly installed 040 processor, a very small gap separates the 040 chip from the metal
040 Processor
spacer. A larger gap caused by the board barrel sockets
Spacer
separates the upgrade board and the spacer.
Small Gap
Barrel Sockets
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Upgrades Macintosh Processor Upgrade - 35
5 Peel the paper from the
back of the heat sink and install the heat sink on the processor.
040 Heat Sink
Note:
Make sure the 040 heat sink is aligned with the sides of the processor.
68LC040 Processor
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Upgrades Macintosh Processor Upgrade - 36

Install the Upgrade Board

Note:
The next step explains
how to prepare the logic
Anti-Static Foam
Logic Board,
Bottom Side
EMI Clip
board to accept the upgrade board.
Caution:
the bottom of the LC 475 and Quadra 605 logic boards flex easily. Do not apply heavy pressure directly to these clips or to the logic board, or you may bend the board.
The EMI clips on
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