Centris 650/Quadra 650 Service Source
The Centris 650/Quadra 650 volume of Apple's Service Source is an 81-page service manual covering both machines, which share a chassis and differ mainly in processor speed. The PDF was distilled on 21 October 1995.
Specifications as printed
| Item | Centris 650 | Quadra 650 |
|---|---|---|
| CPU | Motorola 68040 at 25 MHz, built-in MMU | Motorola 68040 at 33 MHz, built-in MMU |
| Coprocessor | optional FPU | |
| Addressing | 32-bit internal registers, 32-bit address bus, 32-bit data bus | |
| RAM | 4 or 8 MB, expandable to 132 MB (72-pin SIMM) | |
| ROM | 1 MB | |
| PRAM | 256 bytes non-volatile | |
| VRAM | 512K, expandable to 1 MB | |
| Clock/calendar | CMOS custom chip with a long-life lithium battery | |
| Line voltage | 100-240 VAC, 50-60 Hz | |
| Power | 112 W maximum, not including display power | |
| Size | 6.0 in (152 mm) H x 13.0 in (330 mm) W x 16.5 in (419 mm) D | |
| Weight | varies with the internal devices fitted | |
The 112 W maximum excluding the display figure is the one to use when judging whether a supply is adequate for an added drive or card.
Contents
- Basics - Overview (pdf p. 3)
- Specifications - Processors, Memory, Disk Storage, I/O Interfaces, I/O Devices, Sound and Video, Electrical, Physical, Environmental (pdf pp. 5-15)
- Troubleshooting - General; symptom charts for Error Chords, System, Video, Floppy Drive, Hard Drive, CD-ROM Drive and Peripheral (pdf pp. 17-30)
- Take Apart - Top Cover, Power Supply, Drive Chassis, Floppy Drive, Hard Drive, CD-ROM Drive, Speaker, Logic Board (pdf pp. 32-58)
- Additional Procedures - Battery Verification, Battery Replacement, Reset/Interrupt (pdf pp. 60-66)
- Upgrades - Expansion Cards, CD-ROM Drive Upgrade, Power Macintosh Card, Power Macintosh Upgrade (pdf pp. 68-79)
- Exploded View (pdf pp. 80-81)
The Error Chords symptom chart is worth knowing about: these machines signal startup faults by sound as well as by the screen, and Apple's chart maps the chords to causes.
What this manual does not contain
Module-level. No parts list, no schematic, no component values and no capacitor table - any capacitor list for this machine elsewhere is not sourced from this document. No supply-rail voltages or tolerances are printed, and no fuse rating.
Pages that cite this document
- Macintosh Centris 650, Macintosh Centris 650 General Maintenance, Macintosh Centris 650 Troubleshooting
- Macintosh Centris 650 Capacitor Replacement Guide - as the source for what Apple does not publish about this board.
- Macintosh Centris 610 Centris 650 and Quadra 800 Developer Note - the developer note, which does carry rail currents and connector pinouts that this manual does not.
Download: Quadra.centris 650.pdf