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Add Apple 1993 product photo (was a Quadra 610 photo); 86 W is Apple's own figure for the 610 (dev note, tech specs) beside the Service Source's 112 W; cite dev note for RAM, SCSI, slot budget; remove uncited codename, heatsink and keyboard-power claims; parts table; dedupe
 
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{{Infobox computer
{{Infobox computer
| name        = Macintosh Centris 610
| name        = Macintosh Centris 610
| image        = [[File:Macintosh_Quadra_610.jpg]]
| image        = [[File:Macintosh Centris 610 Apple product photo.jpg|260px|frameless]]
| caption      = Macintosh Centris 610 (identical case to Quadra 610)
| caption      = Centris 610 with colour display, in Apple's 1993 product photograph
| manufacturer = Apple Computer, Inc.
| manufacturer = Apple Computer, Inc.
| type        = Personal Computer
| type        = Desktop personal computer
| release_date = February 10, 1993
| release_date = 10 February 1993
| discontinued = October 21, 1993
| discontinued = 21 October 1993
| price        = US$1,860–$2,520
| price        = US$1,860 and US$2,560 (two configurations)
| cpu          = Motorola 68LC040 @ 20 MHz
| cpu          = Motorola MC68LC040 @ 20 MHz (no FPU)
| memory      = 4 MB RAM soldered (expandable to 68 MB)
| memory      = 4 MB on the logic board; two 72-pin SIMM slots; 68 MB maximum
| storage      = 80–500 MB SCSI hard drive, 1.44 MB floppy
| rom          = 1 MB
| display      = Supports up to 1152×870 (8-bit with 1 MB VRAM)
| storage      = 1.4 MB SuperDrive; 80–500 MB SCSI hard drive; optional internal CD-ROM
| sound        = 8-bit stereo
| display      = External monitor via DB-15; 512 KB VRAM, 1 MB maximum
| dimensions  = 3.4" H × 16.3" W × 15.6" D (8.6 × 41.4 × 39.6 cm)
| sound        = 8-bit stereo output, mono input
| weight      = 14 lbs (6.4 kg)
| expansion    = One slot for a 7-inch NuBus card or a PDS card, via adapter
| power        = 100–240 V AC
| dimensions  = 85 × 415 × 397 mm (3.4 × 16.3 × 15.6 in) H × W × D
| weight      = 6.4 kg (14.0 lb)
| os          = System 7.1 – Mac OS 8.1
| os          = System 7.1 – Mac OS 8.1
| predecessor  = [[Macintosh IIsi]]
| successor    = [[Macintosh Quadra 610]]
| successor    = [[Macintosh Quadra 610]]
| codename    = Speedbump 610
| model        = M1444
| model        = M1444
}}
}}
The '''Macintosh Centris 610''' is a low-profile desktop Macintosh with a 20 MHz Motorola MC68LC040. Apple introduced it on 10 February 1993 and discontinued it on 21 October 1993.<ref name="apple">{{cite web |url=https://support.apple.com/en-us/112212 |title=Macintosh Centris 610: Technical Specifications |publisher=Apple |access-date=2026-09-30}}</ref> Apple's developer note describes the Centris 610, [[Macintosh Centris 650]] and [[Macintosh Quadra 800]] as three models bringing the 68040 in at lower prices than the Quadra 700 and 950.<ref name="dnpref">Apple Computer, ''Developer Note: Macintosh Centris 610, Macintosh Centris 650, and Macintosh Quadra 800 Computers'' (1993), Preface, p. ix (PDF p. 9). Hosted as [[:File:Macintosh Centris 610 Centris 650 and Quadra 800 Developer Note.pdf]]; see [[Macintosh Centris 610 Centris 650 and Quadra 800 Developer Note]].</ref> It was replaced by the 25 MHz [[Macintosh Quadra 610]] in the same case.<ref name="lem">{{cite web |url=https://lowendmac.com/1993/centris-610/ |title=Centris 610 |publisher=Low End Mac |access-date=2026-09-30}} Replaced by the Quadra 610 on 21 October 1993; highest Mac OS without a PowerPC upgrade is 8.1.</ref><ref name="ss610spec">Apple Computer, ''Macintosh Quadra 610/Centris 610/WS 60 Service Source'', Specifications, pp. 1-13 (PDF pp. 5-17). Hosted as [[:File:Quadra.centris_610.ws_60.pdf]]; see [[Macintosh Quadra 610/ Centris 610/WS 60 Service Source]].</ref>


The '''Macintosh Centris 610''' is a personal computer designed and manufactured by Apple Computer, released on February 10, 1993.<ref>{{cite web |url=https://everymac.com/systems/apple/mac_centris/specs/mac_centris_610.html |title=Macintosh Centris 610 Specs |publisher=EveryMac.com |access-date=2026-02-10}}</ref> It was introduced as the entry-level model in Apple's new Centris line, positioned between the consumer Macintosh LC series and the professional Quadra series.<ref>{{cite web |url=https://lowendmac.com/1993/centris-610/ |title=Centris 610 |publisher=Low End Mac |access-date=2026-02-10}}</ref>
== Configurations ==
EveryMac lists three configurations: M1345LL/A with 4 MB of RAM, an 80 MB hard drive and no CD-ROM; M1397LL/A with 8 MB and a 230 MB drive; and M1398LL/A with 8 MB, a 230 MB drive and a double-speed CD-ROM. It gives the US prices as $1,860 and $2,560.<ref name="em">{{cite web |url=https://everymac.com/systems/apple/mac_centris/specs/mac_centris_610.html |title=Apple Macintosh Centris 610 Specs |publisher=EveryMac.com |access-date=2026-09-30}} Order numbers, model number M1444, Gestalt ID 52, prices, VRAM SIMMs, NuBus adapter M1402LL/A.</ref> Ethernet was optional on the Centris 610.<ref name="ss610spec" /> The Workgroup Server 60 uses the same case with a 25 MHz 68040, 8 MB of RAM, a 230 or 500 MB drive and Ethernet as standard.<ref name="ss610spec" />


The Centris 610 introduced a new low-profile "pizza box" case design that would later be used for the [[Macintosh Quadra 660AV]] and [[Power Macintosh 6100]]. In October 1993, the Centris 610 was renamed to [[Macintosh Quadra 610]] with a processor speed bump to 25 MHz as Apple consolidated its product naming strategy.<ref>{{cite web |url=https://en.wikipedia.org/wiki/Macintosh_Quadra_610 |title=Macintosh Quadra 610 |publisher=Wikipedia |access-date=2026-02-10}}</ref>
== Hardware ==
=== Processor and memory ===
The MC68LC040 has an integrated MMU but no floating-point unit. The Service Source states that Apple does not provide an FPU upgrade for the Centris 610.<ref name="ss610spec" /> The developer note adds that the MC68LC040 sits in a socket and can be replaced with a full MC68040.<ref name="dn3">''Developer Note: Centris 610, Centris 650, Quadra 800'', Table 1-1, p. 3 (PDF p. 15).</ref> Apple's CPU replacement procedure uses a PGA chip removal tool and warns that pressing down on the tool's handle can damage components on the board.<ref name="ss610cpu">''Quadra 610/Centris 610/WS 60 Service Source'', Additional Procedures, CPU Replacement, pp. 6-9 (PDF pp. 98-101).</ref>


== Model Variants ==
The logic board carries 4 MB of RAM. The two 72-pin SIMM slots take 80 ns or faster SIMMs of 4, 8, 16 or 32 MB, for a maximum of 68 MB.<ref name="apple" /><ref name="dnram">''Developer Note: Centris 610, Centris 650, Quadra 800'', "RAM", p. 21 (PDF p. 33).</ref> The ROM is 1 MB and the PRAM holds 256 bytes, backed by a lithium battery.<ref name="ss610spec" />


The Centris 610 was sold in four configurations at launch:<ref>{{cite web |url=https://support.apple.com/en-us/112212 |title=Macintosh Centris 610: Technical Specifications |publisher=Apple Inc. |access-date=2026-02-10}}</ref>
=== Video ===
Built-in video drives an external monitor from a DB-15 port. The logic board has 512 KB of VRAM; two 256 KB VRAM SIMMs raise it to 1 MB.<ref name="apple" /> VGA monitors are supported at 640 × 480 only and SVGA at 800 × 600 only, with an adapter cable.<ref name="ss610spec" />


* '''Base model''' (M1345LL/A): 4 MB RAM, 80 MB HDD, no Ethernet — US$1,860
<templatestyles src="Template:StyledTable/styles.css" />
* '''Mid-range''': 8 MB RAM, 80 MB HDD, Ethernet
{| class="wikitable styled-table" style="width:60%; text-align:center;"
* '''Upper mid-range''' (M1397LL/A): 8 MB RAM, 230 MB HDD, Ethernet — US$2,560
|+'''Maximum colour depth by resolution'''<ref name="apple" />
* '''High-end''' (M1398LL/A): 8 MB RAM, 1 MB VRAM, 230 MB HDD, 2× CD-ROM, Ethernet, microphone
 
A server variant, the '''Workgroup Server 60''', was introduced in July 1993 with a full 68040 processor.
 
== Architecture and Processor ==
 
The Centris 610 uses a Motorola 68LC040 processor running at 20 MHz. The "LC" designation indicates the processor lacks an integrated floating-point unit (FPU). The 68LC040 can be replaced with a full 68040 to add FPU capability.<ref>{{cite web |url=https://lowendmac.com/1993/centris-610/ |title=Centris 610 |publisher=Low End Mac |access-date=2026-02-10}}</ref>
 
* '''CPU:''' Motorola 68LC040 @ 20 MHz
* '''Data bus:''' 32-bit
* '''Address bus:''' 32-bit
* '''L1 cache:''' 8 KB (integrated)
* '''ROM:''' 1 MB
 
=== Memory ===
 
* '''Onboard RAM:''' 4 MB soldered to logic board
* '''RAM slots:''' 2 × 72-pin SIMM
* '''Maximum RAM:''' 68 MB (4 MB onboard + 2 × 32 MB SIMMs)
* '''RAM speed:''' 80 ns or faster
* '''Supported SIMMs:''' 4, 8, 16, or 32 MB
 
If SIMMs of different speeds are used, the faster SIMM should be installed in bank 0 (frontmost slot).
 
=== Storage ===
 
* '''Floppy drive:''' 1.44 MB SuperDrive (auto-inject)
* '''Hard drive:''' 80, 230, or 500 MB internal SCSI
* '''CD-ROM:''' Optional 2× AppleCD 300i (internal)
* '''SCSI interface:''' External DB-25 connector
 
== Display and Graphics ==
 
The Centris 610 includes built-in video output via a DB-15 connector. VGA monitors can be connected using an adapter.
 
* '''VRAM:''' 512 KB onboard, expandable to 1 MB via SIMM
* '''VRAM slots:''' 2 (accepts 256 KB or 512 KB VRAMs)
 
{| class="wikitable" style="width:60%; text-align:center;"
|+ '''Display Resolutions'''
|-
! Resolution !! 512 KB VRAM !! 1 MB VRAM
! Resolution !! 512 KB VRAM !! 1 MB VRAM
|-
|-
Line 89: Line 54:
|}
|}


== Input/Output and Expansion ==
=== Storage ===
The Centris 610 has an internal 1.4 MB Apple SuperDrive and room for two internal SCSI devices: one 3.5-inch hard drive and one 5.25-inch device such as a CD-ROM drive.<ref name="dn4">''Developer Note: Centris 610, Centris 650, Quadra 800'', "The Macintosh Centris 610 Design", p. 4 (PDF p. 16).</ref> The external DB-25 SCSI port supports up to six external devices.<ref name="ss610spec" /> The drive at the end of the internal SCSI cable must carry terminators and other internal devices must not; the logic board terminates the external end of the bus automatically when nothing is plugged in.<ref name="dnscsi">''Developer Note: Centris 610, Centris 650, Quadra 800'', "SCSI Bus and Termination", pp. 18-19 (PDF pp. 30-31).</ref>


=== Port Configuration ===
=== Ports and expansion ===
Two ADB ports (500 mA maximum for all ADB devices), two mini DIN-8 serial ports, DB-25 SCSI, DB-15 video, stereo sound out and mono sound in, and on Ethernet-equipped models an AAUI-15 port.<ref name="ss610spec" /><ref name="apple" /> The power button is on the front panel; the programmer's NMI and reset buttons and an unswitched AC outlet are on the back.<ref name="dn4" />


* '''ADB ports:''' 2 (keyboard, mouse)
The single expansion slot takes one card through an adapter: either a processor-direct slot (PDS) card or a NuBus card no more than 7 inches long.<ref name="dn4" /> The NuBus adapter was Apple part M1402LL/A.<ref name="em" /> A card may draw 10 W in total, split as follows:<ref name="dn32">''Developer Note: Centris 610, Centris 650, Quadra 800'', Table 3-2, p. 32 (PDF p. 44).</ref>
* '''Serial ports:''' 2 (DIN-8 printer and modem)
* '''SCSI:''' 1 (DB-25 external)
* '''Video:''' 1 (DB-15)
* '''Audio:''' Speaker out, microphone in
* '''Ethernet:''' AAUI-15 (optional on some configurations)


=== Expansion Slots ===
{| class="wikitable styled-table" style="width:60%; text-align:center;"
 
|+'''Centris 610 NuBus card power budget'''<ref name="dn32" />
The Centris 610 has a single Processor Direct Slot (PDS). A NuBus adapter (Apple part M1402LL/A) allows installation of one 7-inch NuBus card. Only 7-inch NuBus cards fit; standard 12-inch cards will not work.<ref>{{cite web |url=https://en.wikipedia.org/wiki/Macintosh_Quadra_610 |title=Macintosh Quadra 610 |publisher=Wikipedia |access-date=2026-02-10}}</ref>
! Supply !! Budget 1 !! Budget 2
 
|-
The low clearance of the case initially prevented use of the full 68040 processor, which requires a heatsink that the 68LC040 does not need.
| +12 V || 2.1 W || 0.0 W
|-
| −12 V || 1.8 W || 0.0 W
|-
| +5 V || 6.1 W || 10.0 W
|}


== Power ==
== Power ==
Line voltage is 100–240 V AC.<ref name="ss610spec" /> Apple's documents give two different power figures. The Service Source lists 112 W, not including the monitor.<ref name="ss610spec" /> The developer note says the Centris 610 power supply "provides 86 W total", and Apple's technical specifications page gives 86 W maximum, 1.7 A, at 47–63 Hz.<ref name="dn9">''Developer Note: Centris 610, Centris 650, Quadra 800'', "Power Supplies", p. 9 (PDF p. 21).</ref><ref name="apple" /> After the logic board and the expansion card, 1.5 A at +5 V and 1.5 A at +12 V remain for internal drives.<ref name="dn9" />


* '''Power:''' 100–240V AC, 47–63 Hz
The clock and PRAM are backed by a 3.6 V lithium battery.<ref name="apple" /> Apple's battery check: measure across the cell with the meter on the 10 V DC range, and replace the battery if it reads below 3.2 V. The holder cover is released by prising the latch at one end with a small flat-blade screwdriver.<ref name="ss610batt">''Quadra 610/Centris 610/WS 60 Service Source'', Additional Procedures, Battery Verification and Battery Replacement, pp. 1-5 (PDF pp. 93-97).</ref> Apple warns that the lithium battery can explode if mishandled.<ref name="ss610batt" />
* '''Max power consumption:''' 86 watts
* '''PRAM battery:''' 3.6V lithium half-AA
 
The power switch is located on the front panel. Unlike the Mac II series, the Centris 610 cannot be powered on or off via the keyboard power key.
 
== General Maintenance ==
For detailed maintenance practices including cleaning, PRAM battery management, connector corrosion prevention, and voltage adjustments, refer to the dedicated [[Macintosh Centris 610 General Maintenance]] page.
 
== Capacitor Replacement Guide ==
Detailed capacitor replacement guidelines for the logic board can be found on the [[Macintosh Centris 610 Capacitor Replacement Guide]] page.


== Troubleshooting ==
== Upgrades ==
A comprehensive troubleshooting guide addressing no power, chime but no video, intermittent operation, and other issues is available on the [[Macintosh Centris 610 Troubleshooting]] page.
The Service Source documents a Centris 660AV logic board upgrade kit for the Centris 610 (logic board, product labels and I/O panel), and upgrades to the Power Macintosh 6100/60 or 6100/60AV. A Power Macintosh card for the PDS converts the machine to PowerPC.<ref name="ss610up">''Quadra 610/Centris 610/WS 60 Service Source'', Upgrades, pp. 13-27 (PDF pp. 77-91).</ref>


== Technical Details ==
== Service parts ==
<templatestyles src="Template:StyledTable/styles.css" />
Selected part numbers from Apple's exploded view, which covers the Centris 610, Quadra 610 and Workgroup Server 60. The drawing does not say which logic board number belongs to which model.<ref name="ss610ev">''Quadra 610/Centris 610/WS 60 Service Source'', Exploded View (PDF p. 103).</ref>
 
{| class="wikitable styled-table" style="width:70%;"
=== System Architecture at a Glance ===
|+'''Centris 610 family service parts'''<ref name="ss610ev" />
{| class="wikitable styled-table" style="width:90%; text-align:center;"
! Part !! Apple part number
! Sub-system !! Specification (Macintosh Centris 610, 1993)
|-
|-
| '''CPU''' || Motorola 68LC040 @ 20 MHz
| Logic board || 661-0042 (no FPU), 661-0043 (FPU), 661-1681, 661-1682 (with Ethernet)
|-
|-
| '''Bus width''' || 32-bit data • 32-bit address
| Power supply || 661-1688
|-
|-
| '''ROM''' || 1 MB
| PDS adapter or NuBus adapter || 661-1718
|-
|-
| '''RAM''' || 4 MB onboard (expandable to 68 MB)
| Floppy drive || 661-0121, 661-0474
|-
|-
| '''Video''' || Up to 1152 × 870 (built-in)
| SCSI cable || 922-0804
|-
|-
| '''Sound''' || 8-bit stereo
| Speaker || 922-0353
|-
|-
| '''Disks''' || 1.44 MB floppy, 80–500 MB SCSI HDD
| On/off actuator || 922-0357
|-
| '''Ports''' || ADB × 2, Serial × 2, SCSI, Video, Audio
|}
|}


=== Processor Specifications ===
== Maintenance and repair ==
{| class="wikitable styled-table"
* [[Macintosh Centris 610 General Maintenance]]
|-
* [[Macintosh Centris 610 Capacitor Replacement Guide]]
! Component !! Specification
* [[Macintosh Centris 610 Troubleshooting]]
|-
 
| CPU || Motorola 68LC040 @ 20 MHz<ref>{{cite web |url=https://support.apple.com/en-us/112212 |title=Macintosh Centris 610: Technical Specifications |publisher=Apple Inc. |access-date=2026-02-10}}</ref>
The Service Source's symptom charts cover video, floppy drive, hard drive, CD-ROM drive and peripherals. It has no error-chord table.<ref name="ss610ts">''Quadra 610/Centris 610/WS 60 Service Source'', Troubleshooting, pp. 1-11 (PDF pp. 19-29).</ref>
|-
| FPU || None (68LC040 variant)
|-
| Data Bus || 32-bit
|-
| Address Bus || 32-bit
|-
| Gestalt ID || 52
|-
| Model Number || M1444
|}


== See Also ==
== Documentation ==
* [[Macintosh Quadra 610/ Centris 610/WS 60 Service Source]]: Apple's module-level service manual (specifications, symptom charts, take-apart, upgrades, battery and CPU procedures, exploded view). It prints the depth as 4.2 in (107 mm), a misprint for the 397 mm given in the developer note.<ref name="ss610spec" /><ref>''Developer Note: Centris 610, Centris 650, Quadra 800'', Table 1-2, p. 4 (PDF p. 16).</ref>
* [[Macintosh Centris 610 Centris 650 and Quadra 800 Developer Note]]: Apple's design description, with the power budgets, SCSI termination and expansion-slot details used above.


* [[Macintosh Quadra 610]] — The renamed/upgraded successor
== Related pages ==
* [[Macintosh Centris 650]] — Mid-range Centris model
* [[Macintosh Quadra 610]]
* [[Macintosh IIsi]] — Predecessor
* [[Macintosh Centris 650]]
* [[Power Macintosh 6100]] — Uses the same case design
* [[Macintosh Centris 660AV]]
* [[Power Macintosh 6100]]


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

Latest revision as of 15:14, 30 September 2026

Macintosh Centris 610
Centris 610 with colour display, in Apple's 1993 product photograph
Specifications
ManufacturerApple Computer, Inc.
TypeDesktop personal computer
Released10 February 1993
Discontinued21 October 1993
Intro priceUS$1,860 and US$2,560 (two configurations)
CPUMotorola MC68LC040 @ 20 MHz (no FPU)
Memory4 MB on the logic board; two 72-pin SIMM slots; 68 MB maximum
Storage1.4 MB SuperDrive; 80–500 MB SCSI hard drive; optional internal CD-ROM
DisplayExternal monitor via DB-15; 512 KB VRAM, 1 MB maximum
Sound8-bit stereo output, mono input
ROM1 MB
ExpansionOne slot for a 7-inch NuBus card or a PDS card, via adapter
Power100–240 V AC
Dimensions85 × 415 × 397 mm (3.4 × 16.3 × 15.6 in) H × W × D
Weight6.4 kg (14.0 lb)
OS / FirmwareSystem 7.1 – Mac OS 8.1
SuccessorMacintosh Quadra 610
Model no.M1444

The Macintosh Centris 610 is a low-profile desktop Macintosh with a 20 MHz Motorola MC68LC040. Apple introduced it on 10 February 1993 and discontinued it on 21 October 1993.[1] Apple's developer note describes the Centris 610, Macintosh Centris 650 and Macintosh Quadra 800 as three models bringing the 68040 in at lower prices than the Quadra 700 and 950.[2] It was replaced by the 25 MHz Macintosh Quadra 610 in the same case.[3][4]

Configurations

[edit | edit source]

EveryMac lists three configurations: M1345LL/A with 4 MB of RAM, an 80 MB hard drive and no CD-ROM; M1397LL/A with 8 MB and a 230 MB drive; and M1398LL/A with 8 MB, a 230 MB drive and a double-speed CD-ROM. It gives the US prices as $1,860 and $2,560.[5] Ethernet was optional on the Centris 610.[4] The Workgroup Server 60 uses the same case with a 25 MHz 68040, 8 MB of RAM, a 230 or 500 MB drive and Ethernet as standard.[4]

Hardware

[edit | edit source]

Processor and memory

[edit | edit source]

The MC68LC040 has an integrated MMU but no floating-point unit. The Service Source states that Apple does not provide an FPU upgrade for the Centris 610.[4] The developer note adds that the MC68LC040 sits in a socket and can be replaced with a full MC68040.[6] Apple's CPU replacement procedure uses a PGA chip removal tool and warns that pressing down on the tool's handle can damage components on the board.[7]

The logic board carries 4 MB of RAM. The two 72-pin SIMM slots take 80 ns or faster SIMMs of 4, 8, 16 or 32 MB, for a maximum of 68 MB.[1][8] The ROM is 1 MB and the PRAM holds 256 bytes, backed by a lithium battery.[4]

Video

[edit | edit source]

Built-in video drives an external monitor from a DB-15 port. The logic board has 512 KB of VRAM; two 256 KB VRAM SIMMs raise it to 1 MB.[1] VGA monitors are supported at 640 × 480 only and SVGA at 800 × 600 only, with an adapter cable.[4]

Maximum colour depth by resolution[1]
Resolution 512 KB VRAM 1 MB VRAM
512 × 384 16-bit 16-bit
640 × 480 8-bit 16-bit
800 × 600 8-bit 16-bit
832 × 624 8-bit 16-bit
1024 × 768 4-bit 8-bit
1152 × 870 4-bit 8-bit

Storage

[edit | edit source]

The Centris 610 has an internal 1.4 MB Apple SuperDrive and room for two internal SCSI devices: one 3.5-inch hard drive and one 5.25-inch device such as a CD-ROM drive.[9] The external DB-25 SCSI port supports up to six external devices.[4] The drive at the end of the internal SCSI cable must carry terminators and other internal devices must not; the logic board terminates the external end of the bus automatically when nothing is plugged in.[10]

Ports and expansion

[edit | edit source]

Two ADB ports (500 mA maximum for all ADB devices), two mini DIN-8 serial ports, DB-25 SCSI, DB-15 video, stereo sound out and mono sound in, and on Ethernet-equipped models an AAUI-15 port.[4][1] The power button is on the front panel; the programmer's NMI and reset buttons and an unswitched AC outlet are on the back.[9]

The single expansion slot takes one card through an adapter: either a processor-direct slot (PDS) card or a NuBus card no more than 7 inches long.[9] The NuBus adapter was Apple part M1402LL/A.[5] A card may draw 10 W in total, split as follows:[11]

Centris 610 NuBus card power budget[11]
Supply Budget 1 Budget 2
+12 V 2.1 W 0.0 W
−12 V 1.8 W 0.0 W
+5 V 6.1 W 10.0 W

Power

[edit | edit source]

Line voltage is 100–240 V AC.[4] Apple's documents give two different power figures. The Service Source lists 112 W, not including the monitor.[4] The developer note says the Centris 610 power supply "provides 86 W total", and Apple's technical specifications page gives 86 W maximum, 1.7 A, at 47–63 Hz.[12][1] After the logic board and the expansion card, 1.5 A at +5 V and 1.5 A at +12 V remain for internal drives.[12]

The clock and PRAM are backed by a 3.6 V lithium battery.[1] Apple's battery check: measure across the cell with the meter on the 10 V DC range, and replace the battery if it reads below 3.2 V. The holder cover is released by prising the latch at one end with a small flat-blade screwdriver.[13] Apple warns that the lithium battery can explode if mishandled.[13]

Upgrades

[edit | edit source]

The Service Source documents a Centris 660AV logic board upgrade kit for the Centris 610 (logic board, product labels and I/O panel), and upgrades to the Power Macintosh 6100/60 or 6100/60AV. A Power Macintosh card for the PDS converts the machine to PowerPC.[14]

Service parts

[edit | edit source]

Selected part numbers from Apple's exploded view, which covers the Centris 610, Quadra 610 and Workgroup Server 60. The drawing does not say which logic board number belongs to which model.[15]

Centris 610 family service parts[15]
Part Apple part number
Logic board 661-0042 (no FPU), 661-0043 (FPU), 661-1681, 661-1682 (with Ethernet)
Power supply 661-1688
PDS adapter or NuBus adapter 661-1718
Floppy drive 661-0121, 661-0474
SCSI cable 922-0804
Speaker 922-0353
On/off actuator 922-0357

Maintenance and repair

[edit | edit source]

The Service Source's symptom charts cover video, floppy drive, hard drive, CD-ROM drive and peripherals. It has no error-chord table.[16]

Documentation

[edit | edit source]
[edit | edit source]

References

[edit | edit source]
  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Macintosh Centris 610: Technical Specifications, Apple—link(accessed 2026-09-30)
  2. ↑ Apple Computer, Developer Note: Macintosh Centris 610, Macintosh Centris 650, and Macintosh Quadra 800 Computers (1993), Preface, p. ix (PDF p. 9). Hosted as File:Macintosh Centris 610 Centris 650 and Quadra 800 Developer Note.pdf; see Macintosh Centris 610 Centris 650 and Quadra 800 Developer Note.
  3. ↑ Centris 610, Low End Mac—link(accessed 2026-09-30) Replaced by the Quadra 610 on 21 October 1993; highest Mac OS without a PowerPC upgrade is 8.1.
  4. ↑ 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 Apple Computer, Macintosh Quadra 610/Centris 610/WS 60 Service Source, Specifications, pp. 1-13 (PDF pp. 5-17). Hosted as File:Quadra.centris_610.ws_60.pdf; see Macintosh Quadra 610/ Centris 610/WS 60 Service Source.
  5. ↑ 5.0 5.1 Apple Macintosh Centris 610 Specs, EveryMac.com—link(accessed 2026-09-30) Order numbers, model number M1444, Gestalt ID 52, prices, VRAM SIMMs, NuBus adapter M1402LL/A.
  6. ↑ Developer Note: Centris 610, Centris 650, Quadra 800, Table 1-1, p. 3 (PDF p. 15).
  7. ↑ Quadra 610/Centris 610/WS 60 Service Source, Additional Procedures, CPU Replacement, pp. 6-9 (PDF pp. 98-101).
  8. ↑ Developer Note: Centris 610, Centris 650, Quadra 800, "RAM", p. 21 (PDF p. 33).
  9. ↑ 9.0 9.1 9.2 Developer Note: Centris 610, Centris 650, Quadra 800, "The Macintosh Centris 610 Design", p. 4 (PDF p. 16).
  10. ↑ Developer Note: Centris 610, Centris 650, Quadra 800, "SCSI Bus and Termination", pp. 18-19 (PDF pp. 30-31).
  11. ↑ 11.0 11.1 Developer Note: Centris 610, Centris 650, Quadra 800, Table 3-2, p. 32 (PDF p. 44).
  12. ↑ 12.0 12.1 Developer Note: Centris 610, Centris 650, Quadra 800, "Power Supplies", p. 9 (PDF p. 21).
  13. ↑ 13.0 13.1 Quadra 610/Centris 610/WS 60 Service Source, Additional Procedures, Battery Verification and Battery Replacement, pp. 1-5 (PDF pp. 93-97).
  14. ↑ Quadra 610/Centris 610/WS 60 Service Source, Upgrades, pp. 13-27 (PDF pp. 77-91).
  15. ↑ 15.0 15.1 Quadra 610/Centris 610/WS 60 Service Source, Exploded View (PDF p. 103).
  16. ↑ Quadra 610/Centris 610/WS 60 Service Source, Troubleshooting, pp. 1-11 (PDF pp. 19-29).
  17. ↑ Developer Note: Centris 610, Centris 650, Quadra 800, Table 1-2, p. 4 (PDF p. 16).


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