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Weight is printed (25 lb/11.3 kg); exploded view has part numbers; add 3.2 V battery threshold, error-chord and system chart detail, PDS/7100 upgrades, storage and I/O; fix 'pages that cite' to real backlinks; remove uncited PSU-adequacy advice; cite to page
 
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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.
The '''Centris 650/Quadra 650''' volume of Apple's ''Service Source'' is an 81-page service manual covering the Macintosh Centris 650 and Macintosh Quadra 650, which share a case and logic board design and differ in processor clock. The PDF's creation date is 21 October 1995.<ref name="ss">Apple Computer, Inc., ''Centris 650/Quadra 650'' (''Service Source''), 81 pp. Hosted as [[:File:Quadra.centris 650.pdf]].</ref>


== Specifications as printed ==
== Specifications ==
<templatestyles src="Template:StyledTable/styles.css" />
<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table"
{| class="wikitable styled-table"
|-
|+'''Centris 650 and Quadra 650 specifications'''<ref name="spec">''Centris 650/Quadra 650'' Service Source, Specifications, pp. 1-11 (PDF pp. 5-15).</ref>
! Item !! Centris 650 !! Quadra 650
! Item !! Centris 650 !! Quadra 650
|-
|-
| CPU || Motorola 68040 at '''25 MHz''', built-in MMU || Motorola 68040 at '''33 MHz''', built-in MMU
| CPU || Motorola 68040 at 25 MHz, built-in MMU || Motorola 68040 at 33 MHz, built-in MMU
|-
|-
| Coprocessor || colspan="2" | optional FPU
| Coprocessor || colspan="2" | Optional FPU
|-
|-
| Addressing || colspan="2" | 32-bit internal registers, 32-bit address bus, 32-bit data bus
| RAM || colspan="2" | 4 or 8 MB, expandable to 132 MB (72-pin SIMMs)
|-
| RAM || colspan="2" | 4 or 8 MB, expandable to '''132 MB''' (72-pin SIMM)
|-
|-
| ROM || colspan="2" | 1 MB
| ROM || colspan="2" | 1 MB
|-
|-
| PRAM || colspan="2" | 256 bytes non-volatile
| PRAM || colspan="2" | 256 bytes
|-
|-
| VRAM || colspan="2" | 512K, expandable to 1 MB
| VRAM || colspan="2" | 512K, expandable to 1 MB
|-
|-
| Clock/calendar || colspan="2" | CMOS custom chip with a '''long-life lithium battery'''
| Clock/calendar || colspan="2" | CMOS custom chip with long-life lithium battery
|-
| Storage || colspan="2" | 1.4 MB SuperDrive; internal SCSI hard drive, 80 to 500 MB; optional internal 5.25-inch CD-ROM
|-
| Expansion || colspan="2" | Three NuBus slots and one processor-direct slot
|-
| I/O || colspan="2" | SCSI (DB-25), two ADB, two RS-232/RS-422 serial (mini DIN-8), on-board Ethernet, DB-15 video, stereo sound out, mono sound in
|-
| ADB power || colspan="2" | 500 mA maximum for all ADB devices
|-
| Line voltage || colspan="2" | 100-240 V AC, 50-60 Hz
|-
|-
| Line voltage || colspan="2" | '''100-240 VAC''', 50-60 Hz
| Power || colspan="2" | 112 W maximum, not including display power
|-
|-
| Power || colspan="2" | '''112 W maximum, not including display power'''
| Size || colspan="2" | 152 mm H × 330 mm W × 419 mm D (6.0 × 13.0 × 16.5 in)
|-
|-
| Size || colspan="2" | 6.0 in (152 mm) H x 13.0 in (330 mm) W x 16.5 in (419 mm) D
| Weight || colspan="2" | 11.3 kg (25 lb), varying with the internal devices fitted
|-
|-
| Weight || colspan="2" | varies with the internal devices fitted
| Operating environment || colspan="2" | 10-40 °C; 10-90% RH non-condensing; up to 3,048 m (10,000 ft)
|}
|}


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 (PDF p. 3): overview
* Specifications (PDF pp. 5-15): processors, memory, disk storage, I/O interfaces, I/O devices, sound and video, electrical, physical, environmental
* Troubleshooting (PDF pp. 17-30): general; symptom charts for error chords, system, video, floppy drive, hard drive, CD-ROM drive and peripherals
* Take Apart (PDF pp. 32-58): top cover, power supply, drive chassis, floppy drive, hard drive, CD-ROM drive, speaker, logic board
* Additional Procedures (PDF pp. 60-66): battery verification, battery replacement, reset/interrupt switch
* Upgrades (PDF pp. 68-79): expansion cards, CD-ROM drive upgrade, Power Macintosh card, Power Macintosh upgrade
* Exploded View (PDF p. 81)
 
== What it settles ==
Battery: with the top cover off, measure the lithium battery on the 10 V DC range, positive probe to the end marked "+" on the logic board. Replace it if it reads below 3.2 V.<ref name="bat">''Centris 650/Quadra 650'' Service Source, Additional Procedures, Battery Verification and Battery Replacement, pp. 1-5 (PDF pp. 60-64).</ref>
 
Symptom charts: for a one-part error chord at startup, Apple's order is to disconnect the hard drive power and data cables and reboot, then disconnect the floppy drive cable and reboot, then replace the logic board, keeping the customer's SIMMs.<ref name="ec">''Centris 650/Quadra 650'' Service Source, Troubleshooting, Symptom Charts: Error Chords, p. 2 (PDF p. 18).</ref> A system that shuts down intermittently may be tripping the thermal protection: check the air vents are clear, and the system should recover after 30 to 40 minutes. Next come the power cord, the battery, the power supply and the logic board. Clicking, chirping or thumping calls for the power supply, then the logic board.<ref name="sys">''Centris 650/Quadra 650'' Service Source, Troubleshooting, Symptom Charts: System, pp. 3-4 (PDF pp. 19-20).</ref>


== Contents ==
Upgrades: both models accept the Power Macintosh card in the processor-direct slot, and both could be upgraded to a Power Macintosh 7100/66 or 7100/66AV.<ref name="up">''Centris 650/Quadra 650'' Service Source, Upgrades, Power Macintosh Card and Power Macintosh Upgrade, pp. 9-12 (PDF pp. 76-79).</ref>
* '''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.
The exploded view gives service part numbers, including the power supply (661-0758), floppy drive (661-0121 or 661-0474), top cover (922-0405), bottom case (922-0406), speaker (922-0055) and internal chassis (922-0058). Logic board and hard drive numbers are referred to a separate parts list.<ref name="ev">''Centris 650/Quadra 650'' Service Source, Exploded View (PDF p. 81).</ref>


== What this manual does not contain ==
== 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.
It is module-level. There is no schematic, no component values or capacitor list, no supply-rail voltages or tolerances and no fuse rating.<ref name="ss" /> Power supply ratings and expansion-slot power budgets are in Apple's [[Macintosh Centris 610 Centris 650 and Quadra 800 Developer Note]].


== Pages that cite this document ==
== Pages that cite this document ==
* [[Macintosh Centris 650]], [[Macintosh Centris 650 General Maintenance]], [[Macintosh Centris 650 Troubleshooting]]
* [[Macintosh Centris 650]]
* [[Macintosh Centris 650 Capacitor Replacement Guide]] - as the source for what Apple does '''not''' publish about this board.
* [[Macintosh Centris 650 General Maintenance]]
* [[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.
* [[Macintosh Centris 650 Troubleshooting]]
* [[Macintosh Quadra 650]]


<pdf> File:Quadra.centris 650.pdf </pdf>
<pdf> File:Quadra.centris 650.pdf </pdf>


Download: [[:File:Quadra.centris 650.pdf|Quadra.centris 650.pdf]]
Download: [[:File:Quadra.centris 650.pdf|Quadra.centris 650.pdf]]
== References ==
<references />


[[Category:Service Manuals]]
[[Category:Service Manuals]]
[[Category:Apple Vintage Computers]]
[[Category:Apple Vintage Computers]]
[[Category:Apple Service Source]]
[[Category:Apple Service Source]]

Latest revision as of 14:05, 30 September 2026

The Centris 650/Quadra 650 volume of Apple's Service Source is an 81-page service manual covering the Macintosh Centris 650 and Macintosh Quadra 650, which share a case and logic board design and differ in processor clock. The PDF's creation date is 21 October 1995.[1]

Specifications

[edit | edit source]
Centris 650 and Quadra 650 specifications[2]
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
RAM 4 or 8 MB, expandable to 132 MB (72-pin SIMMs)
ROM 1 MB
PRAM 256 bytes
VRAM 512K, expandable to 1 MB
Clock/calendar CMOS custom chip with long-life lithium battery
Storage 1.4 MB SuperDrive; internal SCSI hard drive, 80 to 500 MB; optional internal 5.25-inch CD-ROM
Expansion Three NuBus slots and one processor-direct slot
I/O SCSI (DB-25), two ADB, two RS-232/RS-422 serial (mini DIN-8), on-board Ethernet, DB-15 video, stereo sound out, mono sound in
ADB power 500 mA maximum for all ADB devices
Line voltage 100-240 V AC, 50-60 Hz
Power 112 W maximum, not including display power
Size 152 mm H × 330 mm W × 419 mm D (6.0 × 13.0 × 16.5 in)
Weight 11.3 kg (25 lb), varying with the internal devices fitted
Operating environment 10-40 °C; 10-90% RH non-condensing; up to 3,048 m (10,000 ft)

Contents

[edit | edit source]
  • Basics (PDF p. 3): overview
  • Specifications (PDF pp. 5-15): processors, memory, disk storage, I/O interfaces, I/O devices, sound and video, electrical, physical, environmental
  • Troubleshooting (PDF pp. 17-30): general; symptom charts for error chords, system, video, floppy drive, hard drive, CD-ROM drive and peripherals
  • Take Apart (PDF pp. 32-58): top cover, power supply, drive chassis, floppy drive, hard drive, CD-ROM drive, speaker, logic board
  • Additional Procedures (PDF pp. 60-66): battery verification, battery replacement, reset/interrupt switch
  • Upgrades (PDF pp. 68-79): expansion cards, CD-ROM drive upgrade, Power Macintosh card, Power Macintosh upgrade
  • Exploded View (PDF p. 81)

What it settles

[edit | edit source]

Battery: with the top cover off, measure the lithium battery on the 10 V DC range, positive probe to the end marked "+" on the logic board. Replace it if it reads below 3.2 V.[3]

Symptom charts: for a one-part error chord at startup, Apple's order is to disconnect the hard drive power and data cables and reboot, then disconnect the floppy drive cable and reboot, then replace the logic board, keeping the customer's SIMMs.[4] A system that shuts down intermittently may be tripping the thermal protection: check the air vents are clear, and the system should recover after 30 to 40 minutes. Next come the power cord, the battery, the power supply and the logic board. Clicking, chirping or thumping calls for the power supply, then the logic board.[5]

Upgrades: both models accept the Power Macintosh card in the processor-direct slot, and both could be upgraded to a Power Macintosh 7100/66 or 7100/66AV.[6]

The exploded view gives service part numbers, including the power supply (661-0758), floppy drive (661-0121 or 661-0474), top cover (922-0405), bottom case (922-0406), speaker (922-0055) and internal chassis (922-0058). Logic board and hard drive numbers are referred to a separate parts list.[7]

What this manual does not contain

[edit | edit source]

It is module-level. There is no schematic, no component values or capacitor list, no supply-rail voltages or tolerances and no fuse rating.[1] Power supply ratings and expansion-slot power budgets are in Apple's Macintosh Centris 610 Centris 650 and Quadra 800 Developer Note.

Pages that cite this document

[edit | edit source]

Download: Quadra.centris 650.pdf

References

[edit | edit source]
  1. ↑ 1.0 1.1 Apple Computer, Inc., Centris 650/Quadra 650 (Service Source), 81 pp. Hosted as File:Quadra.centris 650.pdf.
  2. ↑ Centris 650/Quadra 650 Service Source, Specifications, pp. 1-11 (PDF pp. 5-15).
  3. ↑ Centris 650/Quadra 650 Service Source, Additional Procedures, Battery Verification and Battery Replacement, pp. 1-5 (PDF pp. 60-64).
  4. ↑ Centris 650/Quadra 650 Service Source, Troubleshooting, Symptom Charts: Error Chords, p. 2 (PDF p. 18).
  5. ↑ Centris 650/Quadra 650 Service Source, Troubleshooting, Symptom Charts: System, pp. 3-4 (PDF pp. 19-20).
  6. ↑ Centris 650/Quadra 650 Service Source, Upgrades, Power Macintosh Card and Power Macintosh Upgrade, pp. 9-12 (PDF pp. 76-79).
  7. ↑ Centris 650/Quadra 650 Service Source, Exploded View (PDF p. 81).
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