Apple Macintosh Quadra Centris 605 Service Manual
K
Service Source
Macintosh LC Series/
Quadra 605
Macintosh LC, Macintosh LC II,
Macintosh LC III, Macintosh LC 475,
Macintosh Quadra 605
K
Service Source
Basics
Macintosh LC Series/Quadra 605
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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Service Source
Specifications
Macintosh LC Series/Quadra 605
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."
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
Specifications Processor - 3
LC 475/Quadra 605
Motorola 68LC040 microprocessor
25 MHz
32-bit internal data bus
Burst-mode RAM access
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
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
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
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
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.
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
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
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.
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
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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Service Source
Troubleshooting
Macintosh LC Series/Quadra 605
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
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.
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)
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.
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)
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)
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.
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)
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.
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.
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)
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)
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