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.
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