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Apple Service Source: case width and depth were transposed across the 630 family (Apple: 16.5 in W x 12.6 in D); sound is 8-bit MONO input and 8-bit stereo output (16-bit only in CD mode), not 16-bit stereo in and out; added Apple's 45 W supply rating, 1 MB ROM, the two logic-board SIMM variants 661-0158 (36 MB) and 661-1114 (52 MB), the no-internal-SCSI statement and the slot pinouts; recorded that Apple's own volume misprints maximum power as 5 W
Rewrite: citation pointed at Apple's Quadra 605 sheet (SP221); now Apple 112348, Macworld Sep 1994 (8 MB, 14-inch monitor), EveryMac and LEM; not in the 630 Series SS configuration list; battery; Navbox
 
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{{Infobox computer
{{Infobox computer
| name        = Macintosh Performa 636CD
| name        = Macintosh Performa 636CD
| image        = [[File:Macintosh_LC_630.jpg]]
| image        = [[File:Apple Macintosh Performa 630.jpg|250px|frameless]]
| caption      = Macintosh Performa 636CD
| caption      = Performa 630 with a CD-ROM drive; the 636CD uses the same case (Hellis, Italian Wikipedia, CC BY-SA 3.0)
| manufacturer = Apple Computer, Inc.
| manufacturer = Apple Computer, Inc.
| type        = Personal Computer
| type        = Desktop personal computer
| release date = July 18, 1994
| release_date = 1 July 1994 (Apple); 18 July 1994 (EveryMac)
| discontinued = February 1996
| discontinued = 1 July 1995
| price        = US$1,649
| price        = US$1,649-1,699 (Apple estimated street price, 1994)
| cpu          = Motorola 68LC040 @ 33 MHz
| cpu          = Motorola 68LC040 at 33 MHz, no FPU
| memory      = 4 MB RAM (expandable to 36 MB)
| memory      = 8 MB (4 MB on the logic board plus a SIMM); one 72-pin SIMM socket (80 ns); 36 MB maximum
| storage      = 250 MB IDE hard drive, 2× CD-ROM, 1.44 MB floppy drive
| rom          = 1 MB
| display      = Supports up to 832×624 at 8-bit color
| graphics    = 1 MB DRAM frame buffer, not expandable; DB-15 port
| sound        = 8-bit mono input, 8-bit stereo output (16-bit in CD mode)
| storage      = 250 MB internal IDE hard drive (EveryMac: 500 MB)
| dimensions  = 4.3" H × 16.5" W × 12.6" D (10.95 × 41.95 × 32 cm)
| media        = 1.4 MB Apple SuperDrive (manual insert); double-speed CD-ROM drive
| weight      = 19 lbs (8.6 kg)
| sound        = 8-bit mono input; 8-bit stereo output (16-bit in CD mode)
| os          = System 7.1.2P – Mac OS 8.1
| expansion    = 114-pin LC processor-direct slot, 112-pin communications slot, 60-pin video-in slot, 10-pin TV tuner connector
| predecessor  = [[Macintosh Performa 600CD|Performa 600CD]]
| ports        = One ADB, two RS-232/RS-422 serial (mini DIN-8), SCSI (DB-25), DB-15 video, sound in, sound out front and rear
| successor    = [[Macintosh Performa 6200CD|Performa 6200CD]]
| power        = 100-240 V AC, 50-60 Hz, 45 W maximum
| codename    = Crusader
| dimensions  = 4.3 × 16.5 × 12.6 in (10.95 × 41.95 × 32 cm)
| model        = M3076
| weight      = 19 lb (8.6 kg)
| os          = System 7.1.2P to Mac OS 8.1
| model        = M3076 (Gestalt ID 98)
}}
}}
The '''Macintosh Performa 636CD''' is a personal computer manufactured by Apple Computer and released on July 18, 1994.<ref>{{cite web |url=https://support.apple.com/kb/SP221 |title=Macintosh Performa 636: Technical Specifications |publisher=Apple Inc. |access-date=2026-02-10}}</ref> It is the [[Macintosh Performa 636|Performa 636]] with an added CD-ROM drive, sold exclusively to the higher-education market.
The '''Macintosh Performa 636CD''' is the [[Macintosh Performa 636|Performa 636]] with a CD-ROM drive, a model in Apple's [[Macintosh Performa 630|Performa 630]] series sold only through the higher-education channel. Apple's specification sheet covers the 636 and 636CD together: a 33 MHz 68LC040, a minimum of 4 MB of RAM, a 250 MB IDE hard drive and a double-speed CD-ROM drive, introduced 1 July 1994.<ref name="apple">{{cite web |url=https://support.apple.com/en-us/112348 |title=Macintosh Performa 636 and 636CD: Technical Specifications |publisher=Apple |access-date=2026-09-30}} Introduced 7/1/1994; RAM 4-36 MB; minimum hard drive 250 MB. 68LC040 at 33 MHz, no FPU; data path 32-bit, 33 MHz; slots LC, comm, TV, video in; one ADB; DB-15 video; 45 W maximum, 100-240 V, 50-60 Hz; battery type 4.5 V alkaline; 4 MB on the logic board, one 72-pin SIMM slot, 80 ns; 1 MB video DRAM; Gestalt ID 98; System 7.1.2P with System Enabler 405; 1 MB ROM; 2x CD-ROM.</ref> ''Macworld'' listed the 636CD in September 1994 at an estimated street price of US$1,649 to US$1,699, with 8 MB, a 250 MB hard drive, a CD-ROM drive, a 14-inch monitor and keyboard, available only to higher education.<ref name="macworld">Jim Heid, "Multimedia Mac", ''Macworld'', vol. 11 no. 9, September 1994, pp. 98-103, table "The Quadra 630 Family Tree" (Apple's estimated street prices). [https://archive.org/details/MacWorld_9409_Sept_1994 archive.org scan]. Performa 630CD US$1,849-1,899 (8 MB, 250 MB, CD-ROM, 14-inch monitor); Performa 635 US$1,849-1,899 (5 MB, 250 MB, CD-ROM, 15-inch monitor); Performa 636 US$1,349-1,399 (4 MB, 250 MB, no CD-ROM, 14-inch monitor); Performa 636CD US$1,649-1,699 (8 MB, 250 MB, CD-ROM, 14-inch monitor); the 636 and 636CD "available in higher-education channel only"; all Performa models include monitor and keyboard.</ref>


== Target Market ==
The [[Macintosh Performa 630]] page has the configuration table for the series, the full specification and a selection of Apple's symptom charts.
Like the Performa 636, the 636CD was available only through higher-education sales channels (colleges and universities).<ref>{{cite web |url=https://en.wikipedia.org/wiki/Macintosh_Quadra_630 |title=Macintosh Quadra 630 |publisher=Wikipedia |access-date=2026-02-10}}</ref>


== Architecture and Processor ==
== Configuration ==
The Performa 636CD uses a Motorola 68LC040 processor running at 33 MHz without an integrated FPU.
Apple's ''Macintosh Performa 630 Series'' Service Source names the 636 but not the 636CD, and gives no configuration for it; its specifications, symptom charts and procedures cover the whole series.<ref name="ss" /> EveryMac gives the 636CD 8 MB of RAM, a 500 MB hard drive and an external 14.4k modem, without a monitor, at US$1,400 (order number M3402LL/A), and Low End Mac also describes it without a display.<ref name="everymac">{{cite web |url=https://everymac.com/systems/apple/mac_performa/specs/mac_performa_636cd.html |title=Apple Macintosh Performa 636 (CD) Specs |publisher=EveryMac |access-date=2026-09-30}} Covers the 636 and 636CD: 8 MB; 500 MB IDE; 2X CD-ROM on the 636CD; 14.4k external modem; identical to the 635CD but with more RAM and a larger hard drive, without the 15-inch monitor; introduced 18 July 1994, discontinued 1 July 1995; order number M3402LL/A; US$1,400.</ref><ref name="lem">{{cite web |url=https://lowendmac.com/1994/performa-630/ |title=Performa 630 and LC 630 |publisher=Low End Mac |access-date=2026-09-30}} Model list: 635CD same as 630CD with 5 MB, bundled with modem and display; 636 same as 635CD but no CD-ROM or display, 8 MB; 636CD same as 636 with CD-ROM, higher education only; 637CD same as 636CD bundled with display, higher education only; 638CD same as 637CD without display, includes TV tuner/video input card; 638CD/V same as 638CD with TV tuner and multiscan display. PRAM battery 4.5 V alkaline. The IDE controller supports a single device; Macs with IDE drives do not supply SCSI termination power.</ref>


== Memory and Storage ==
The CD-ROM drive is a SCSI device, set to SCSI ID 3 at the factory, although the hard drive is IDE.<ref name="ss" />
The system ships with 4 MB of RAM soldered to the logic board. A single 72-pin SIMM socket allows expansion up to 36 MB total.
 
Storage includes:
* 250 MB IDE hard drive
* 2× Apple CD 300i plus CD-ROM drive
* 1.44 MB SuperDrive floppy
 
== Display and Graphics ==
1 MB of dedicated DRAM for video. Supported resolutions:
* 512×384, 640×480: 16-bit color
* 800×600, 832×624: 8-bit color
 
== Variants ==
* [[Macintosh Performa 636|Performa 636]] – Without CD-ROM
* [[Macintosh Performa 637CD|Performa 637CD]] – 636CD with display bundle and 350 MB HD
 
== General Maintenance ==
For maintenance procedures, refer to the [[Macintosh LC 630 General Maintenance]] page.
 
== Capacitor Replacement Guide ==
See the [[Macintosh LC 630 Capacitor Replacement Guide]] page.
 
== Troubleshooting ==
See the [[Macintosh LC 630 Troubleshooting]] page.
 
== Service Documentation ==
 
The official Apple Service Source documentation for this model:
 
<pdf width="800" height="500">File:Performa_630_series.pdf</pdf>
 
 
== Apple service data ==
 
Apple's own figures for the 630 series, from the ''Macintosh Performa 630 Series'' Service Source volume
hosted on this wiki.<ref name="ss630">Apple Computer, ''Macintosh Performa 630 Series'', Service Source. Hosted here as [[Macintosh Performa 630 Series Service Source]] ([[:File:Performa_630_series.pdf]]). Specifications chapter.</ref>


== Specifications ==
<templatestyles src="Template:StyledTable/styles.css" />
<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table" style="width:90%;"
{| class="wikitable styled-table" style="width:90%;"
! Item !! Apple's figure
|+'''Performa 630 series specifications (Apple)'''
|-
! Item !! Specification
| Case || Height 4.3 in. (10.95 cm), '''width 16.5 in. (41.95 cm)''', '''depth 12.6 in. (32 cm)'''
|-
| Weight || Without CD-ROM 17 lb. (7.7 kg); with CD-ROM 19 lb. (8.6 kg)
|-
| Line voltage || 100–240 VAC, 50–60 Hz
|-
| Maximum power || '''45 W, not including the monitor'''
|-
| ROM || '''1 MB'''
|-
|-
| DRAM || 4 MB built in, expandable to '''36 MB''' if the logic board has one SIMM slot (part number '''661-0158''') or '''52 MB''' if it has two (part number '''661-1114'''; one ordinary slot and one single-sided slot)
| Processor || Motorola 68LC040 at 33 MHz, no FPU<ref name="ss" /><ref name="apple" />
|-
|-
| Video || 1 MB DRAM frame buffer; '''video memory cannot be expanded'''. Up to 16 bits per pixel on 12-, 13- and 14-inch Apple monitors, the 15-inch multiple-scan and VGA (640×480); up to 8 bits per pixel on the Apple 16-inch and SVGA (800×600)
| RAM || 4 MB on the logic board; one 72-pin SIMM socket, 80 ns; 36 MB maximum<ref name="apple" /><ref name="ss" />
|-
|-
| Sound || '''8-bit monophonic''' sound input; '''8-bit stereo''' output (16-bit in CD mode), nominally 0.5 V RMS into 39 ohms. Internal speaker muted when a plug is inserted in an output jack
| Video || 1 MB DRAM frame buffer, not expandable; up to 16 bits per pixel at 640 × 480, 8 bits at 800 × 600<ref name="ss" />
|-
|-
| Microphone || Electret, omnidirectional, running on '''8 VDC''' supplied by the sound-input port
| Drives || 1.4 MB SuperDrive, manual insert; IDE hard drive; AppleCD 300i Plus double-speed CD-ROM drive. Internal SCSI hard drives are not supported<ref name="ss" />
|-
|-
| Storage || IDE hard drive. '''Apple states that 630-series machines do not support internal SCSI hard drives''' &mdash; the internal IDE interface was new to Apple with this family
| Sound || 8-bit mono input; 8-bit stereo output, 16-bit in CD mode, 0.5 V RMS into 39 ohms<ref name="ss" />
|-
|-
| Slots || Processor-direct slot '''114-pin''' (LC-compatible); communications slot '''112-pin'''; video-in slot '''60-pin'''; TV tuner port '''10-pin'''
| Electrical || 100-240 V AC, 50-60 Hz; 45 W maximum, not including the monitor<ref name="apple" /><ref name="sslc" />
|-
| SCSI || One external DB-25 port, up to '''six''' external devices
|}
|}
The ''Performa 630 Series'' volume prints the maximum power as "5 W"; Apple's specification sheet and the ''LC 630/Quadra 630/Performa 640'' volume give 45 W.<ref name="ss" /><ref name="apple" /><ref name="sslc" />


'''Maximum power is printed as "5 W" in the Performa 630 Series volume.''' The LC 630/Quadra 630/Performa
== Battery ==
640 volume, covering the same logic board and the same chassis, prints '''45 W''' in the same field; 5 W
Apple's specification sheet gives the battery as 4.5 V alkaline.<ref name="apple" /> The Service Source gives no test voltage; its symptom charts print "Unplug 5.4 battery" for the 20-second battery-unplug step, a misprint for 4.5, which the LC 630 volume prints for the same step.<ref name="ss" /><ref name="sslc" /> Neutralise alkaline leakage with a weak acid such as vinegar; see [[Battery Explosion, Capacitor or Corrosion Damage]].
is an Apple typographical error and 45 W is used here.<ref name="ss630" /><ref name="sslc630">Apple Computer, ''LC 630/Quadra 630/Performa 640'', Service Source. Hosted here as [[LC 630/Quadra 630/ Performa 640 Service Source]] ([[:File:Quadra.lc_630.performa_640.pdf]]). Specifications chapter.</ref>


A '''PRAM battery''' threshold is given nowhere in either 630-series volume. Apple's symptom chart step
== Maintenance and repair ==
appears as "Unplug 4.5 battery" in the LC 630 volume and "Unplug 5.4 battery" in the Performa 630 volume
The Performa 636CD has the LC 630's case and logic board family, and the LC 630 guides apply: [[Macintosh LC 630 General Maintenance]], [[Macintosh LC 630 Troubleshooting]] and [[Macintosh LC 630 Capacitor Replacement Guide]].
&mdash; for the identical instruction, in the same family. The Performa 6200/6300 volume, for the machine
that replaced this one in the same chassis, prints "Unplug '''4.5 V''' battery" with the unit spelled out,
and gives '''replace below 3.0 V''' measured on the 10 V DC scale. Treat "5.4" as a transposition of 4.5,
identify the pack from its own markings before buying a replacement, and neutralise any leakage with
'''sodium bicarbonate''' unless the cell in front of you is marked alkaline.<ref name="ss630" /><ref name="sslc630" />


== See Also ==
== Documentation ==
* [[Macintosh Performa 630 Series Service Source]]: Apple's service manual for the Performa 630 series.<ref name="ss">Apple Computer, ''Macintosh Performa 630 Series'' Service Source (1995), [[:File:Performa 630 series.pdf]]; see [[Macintosh Performa 630 Series Service Source]]. PDF page numbers: title p. 1; General Information pp. 3-6; Product Configuration pp. 7-12; Processor p. 18; Memory pp. 19-20; Disk Storage p. 21; I/O Interfaces pp. 22-24; Sound and Video p. 26; Electrical p. 27; Physical p. 28; Symptom Charts pp. 31-46 (battery step pp. 36, 43; video-in card p. 37; CD-ROM p. 41); Logic Board take-apart p. 70; Exploded View p. 120.</ref>
* [[LC 630/Quadra 630/ Performa 640 Service Source]]<ref name="sslc">Apple Computer, ''LC 630/Quadra 630/Performa 640'' Service Source, [[:File:Quadra.lc 630.performa 640.pdf]]; see [[LC 630/Quadra 630/ Performa 640 Service Source]]. Electrical, PDF p. 27 (45 W); symptom chart, PDF p. 37 ("Unplug 4.5 battery").</ref>
 
<pdf width="800" height="500">File:Performa 630 series.pdf</pdf>
 
== Related pages ==
* [[Macintosh Performa 630]] and the rest of the Performa 630 series
* [[Macintosh Performa 636]]
* [[Macintosh Performa 636]]
* [[Macintosh LC 630]]
* [[Macintosh Performa 637CD]]


== References ==
== References ==
<references />
<references />


{{Navbox-AppleVintage|state=collapsed}}
[[Category:Apple Vintage Computers]]
[[Category:Apple Vintage Computers]]
[[Category:Macintosh Performa]]

Latest revision as of 17:42, 30 September 2026

Macintosh Performa 636CD
Performa 630 with a CD-ROM drive; the 636CD uses the same case (Hellis, Italian Wikipedia, CC BY-SA 3.0)
Specifications
ManufacturerApple Computer, Inc.
TypeDesktop personal computer
Released1 July 1994 (Apple); 18 July 1994 (EveryMac)
Discontinued1 July 1995
Intro priceUS$1,649-1,699 (Apple estimated street price, 1994)
CPUMotorola 68LC040 at 33 MHz, no FPU
Memory8 MB (4 MB on the logic board plus a SIMM); one 72-pin SIMM socket (80 ns); 36 MB maximum
Storage250 MB internal IDE hard drive (EveryMac: 500 MB)
Display—
Sound8-bit mono input; 8-bit stereo output (16-bit in CD mode)
Graphics1 MB DRAM frame buffer, not expandable; DB-15 port
ROM1 MB
Media1.4 MB Apple SuperDrive (manual insert); double-speed CD-ROM drive
Ports / interfaceOne ADB, two RS-232/RS-422 serial (mini DIN-8), SCSI (DB-25), DB-15 video, sound in, sound out front and rear
Expansion114-pin LC processor-direct slot, 112-pin communications slot, 60-pin video-in slot, 10-pin TV tuner connector
Power100-240 V AC, 50-60 Hz, 45 W maximum
Dimensions4.3 × 16.5 × 12.6 in (10.95 × 41.95 × 32 cm)
Weight19 lb (8.6 kg)
OS / FirmwareSystem 7.1.2P to Mac OS 8.1
Model no.M3076 (Gestalt ID 98)

The Macintosh Performa 636CD is the Performa 636 with a CD-ROM drive, a model in Apple's Performa 630 series sold only through the higher-education channel. Apple's specification sheet covers the 636 and 636CD together: a 33 MHz 68LC040, a minimum of 4 MB of RAM, a 250 MB IDE hard drive and a double-speed CD-ROM drive, introduced 1 July 1994.[1] Macworld listed the 636CD in September 1994 at an estimated street price of US$1,649 to US$1,699, with 8 MB, a 250 MB hard drive, a CD-ROM drive, a 14-inch monitor and keyboard, available only to higher education.[2]

The Macintosh Performa 630 page has the configuration table for the series, the full specification and a selection of Apple's symptom charts.

Configuration

[edit | edit source]

Apple's Macintosh Performa 630 Series Service Source names the 636 but not the 636CD, and gives no configuration for it; its specifications, symptom charts and procedures cover the whole series.[3] EveryMac gives the 636CD 8 MB of RAM, a 500 MB hard drive and an external 14.4k modem, without a monitor, at US$1,400 (order number M3402LL/A), and Low End Mac also describes it without a display.[4][5]

The CD-ROM drive is a SCSI device, set to SCSI ID 3 at the factory, although the hard drive is IDE.[3]

Specifications

[edit | edit source]
Performa 630 series specifications (Apple)
Item Specification
Processor Motorola 68LC040 at 33 MHz, no FPU[3][1]
RAM 4 MB on the logic board; one 72-pin SIMM socket, 80 ns; 36 MB maximum[1][3]
Video 1 MB DRAM frame buffer, not expandable; up to 16 bits per pixel at 640 × 480, 8 bits at 800 × 600[3]
Drives 1.4 MB SuperDrive, manual insert; IDE hard drive; AppleCD 300i Plus double-speed CD-ROM drive. Internal SCSI hard drives are not supported[3]
Sound 8-bit mono input; 8-bit stereo output, 16-bit in CD mode, 0.5 V RMS into 39 ohms[3]
Electrical 100-240 V AC, 50-60 Hz; 45 W maximum, not including the monitor[1][6]

The Performa 630 Series volume prints the maximum power as "5 W"; Apple's specification sheet and the LC 630/Quadra 630/Performa 640 volume give 45 W.[3][1][6]

Battery

[edit | edit source]

Apple's specification sheet gives the battery as 4.5 V alkaline.[1] The Service Source gives no test voltage; its symptom charts print "Unplug 5.4 battery" for the 20-second battery-unplug step, a misprint for 4.5, which the LC 630 volume prints for the same step.[3][6] Neutralise alkaline leakage with a weak acid such as vinegar; see Battery Explosion, Capacitor or Corrosion Damage.

Maintenance and repair

[edit | edit source]

The Performa 636CD has the LC 630's case and logic board family, and the LC 630 guides apply: Macintosh LC 630 General Maintenance, Macintosh LC 630 Troubleshooting and Macintosh LC 630 Capacitor Replacement Guide.

Documentation

[edit | edit source]

[edit | edit source]

References

[edit | edit source]
  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Macintosh Performa 636 and 636CD: Technical Specifications, Apple—link(accessed 2026-09-30) Introduced 7/1/1994; RAM 4-36 MB; minimum hard drive 250 MB. 68LC040 at 33 MHz, no FPU; data path 32-bit, 33 MHz; slots LC, comm, TV, video in; one ADB; DB-15 video; 45 W maximum, 100-240 V, 50-60 Hz; battery type 4.5 V alkaline; 4 MB on the logic board, one 72-pin SIMM slot, 80 ns; 1 MB video DRAM; Gestalt ID 98; System 7.1.2P with System Enabler 405; 1 MB ROM; 2x CD-ROM.
  2. ↑ Jim Heid, "Multimedia Mac", Macworld, vol. 11 no. 9, September 1994, pp. 98-103, table "The Quadra 630 Family Tree" (Apple's estimated street prices). archive.org scan. Performa 630CD US$1,849-1,899 (8 MB, 250 MB, CD-ROM, 14-inch monitor); Performa 635 US$1,849-1,899 (5 MB, 250 MB, CD-ROM, 15-inch monitor); Performa 636 US$1,349-1,399 (4 MB, 250 MB, no CD-ROM, 14-inch monitor); Performa 636CD US$1,649-1,699 (8 MB, 250 MB, CD-ROM, 14-inch monitor); the 636 and 636CD "available in higher-education channel only"; all Performa models include monitor and keyboard.
  3. ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 Apple Computer, Macintosh Performa 630 Series Service Source (1995), File:Performa 630 series.pdf; see Macintosh Performa 630 Series Service Source. PDF page numbers: title p. 1; General Information pp. 3-6; Product Configuration pp. 7-12; Processor p. 18; Memory pp. 19-20; Disk Storage p. 21; I/O Interfaces pp. 22-24; Sound and Video p. 26; Electrical p. 27; Physical p. 28; Symptom Charts pp. 31-46 (battery step pp. 36, 43; video-in card p. 37; CD-ROM p. 41); Logic Board take-apart p. 70; Exploded View p. 120.
  4. ↑ Apple Macintosh Performa 636 (CD) Specs, EveryMac—link(accessed 2026-09-30) Covers the 636 and 636CD: 8 MB; 500 MB IDE; 2X CD-ROM on the 636CD; 14.4k external modem; identical to the 635CD but with more RAM and a larger hard drive, without the 15-inch monitor; introduced 18 July 1994, discontinued 1 July 1995; order number M3402LL/A; US$1,400.
  5. ↑ Performa 630 and LC 630, Low End Mac—link(accessed 2026-09-30) Model list: 635CD same as 630CD with 5 MB, bundled with modem and display; 636 same as 635CD but no CD-ROM or display, 8 MB; 636CD same as 636 with CD-ROM, higher education only; 637CD same as 636CD bundled with display, higher education only; 638CD same as 637CD without display, includes TV tuner/video input card; 638CD/V same as 638CD with TV tuner and multiscan display. PRAM battery 4.5 V alkaline. The IDE controller supports a single device; Macs with IDE drives do not supply SCSI termination power.
  6. ↑ 6.0 6.1 6.2 6.3 Apple Computer, LC 630/Quadra 630/Performa 640 Service Source, File:Quadra.lc 630.performa 640.pdf; see LC 630/Quadra 630/ Performa 640 Service Source. Electrical, PDF p. 27 (45 W); symptom chart, PDF p. 37 ("Unplug 4.5 battery").


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