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Macintosh LC Series/ Quadra 605 Service Source

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The Macintosh LC Series/Quadra 605 Service Source is Apple's 112-page module-level service manual for the Macintosh LC, LC II, LC III, LC 475 and Quadra 605. The hosted copy is Apple's Acrobat edition from the Service Source CD, produced on 4 December 1995. It covers the LC III but not the 33 MHz LC III+, which Apple services in the Macintosh Performa 400 Series Service Source as the Performa 460/466/467.[1]

Contents

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Page numbers are positions in the PDF.[1]

  • Basics: Overview (p. 3)
  • Specifications: Introduction (p. 5), Processor (pp. 6–7), Memory (pp. 8–9), Disk Storage (p. 10), I/O Interfaces (pp. 11–12), I/O Devices (p. 13), Sound and Video (pp. 14–15), Electrical (p. 16), Physical (p. 17)
  • Troubleshooting: General (p. 19); Symptom Charts: Error Chords (pp. 20–21), Built-in Video (pp. 22–24), Floppy Drive (pp. 25–26), Hard Drive (p. 27), Peripherals (pp. 28–31), Miscellaneous (pp. 32–36)
  • Take Apart: Top Cover (p. 38), Hard Drive (p. 39), Fan/Speaker Assembly (LC) (p. 42), Fan (LC II/III) (p. 44), Speaker (LC II/III) (p. 46), Floppy Drive (p. 48), Power Supply (p. 53), Logic Board (p. 55)
  • Upgrades: LC Ethernet Upgrade (p. 65), LC II Upgrade (p. 68), LC to LC III Upgrade (p. 71), LC II to LC III Upgrade (p. 78), LC 475 Logic Board Upgrade (p. 82), Macintosh Processor Upgrade (p. 87)
  • Additional Procedures: Battery Verification (p. 106), Battery Replacement (p. 108)
  • Exploded View (p. 112)

Specifications as printed

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Apple's specifications (pp. 6–17)
Item LC LC II LC III LC 475 / Quadra 605
Processor 68020, 16 MHz, 16-bit internal data bus 68030, 16 MHz, 16-bit internal data bus, burst-mode RAM access 68030, 25 MHz, 32-bit internal data bus, burst mode, coprocessor socket 68LC040, 25 MHz, 32-bit internal data bus, burst mode
DRAM 2 MB, to 10 MB (100 ns) 4 MB, to 10 MB (100 ns) 4 MB, to 36 MB (80 ns) 4 or 8 MB, to 36 MB (80 ns)
ROM 512K 512K 512K, expandable to 1 MB 512K, expandable to 1 MB
VRAM 256K, upgradable to 512K 256K VRAM SIMM, upgradable to 512K 512K on board, upgradable to 768K two 256K VRAM SIMMs, upgradable to 1 MB
Expansion 96-pin PDS (020 cards) 96-pin PDS (020/030 cards) 114-pin PDS (020/030 cards) 114-pin slot (030/040 I/O cards; no 030 accelerator or cache cards)
Hard drive at introduction 40 or 80 MB 40, 80 or 160 MB 40, 80 or 160 MB 160 or 230 MB
Sound Mono input and output; 8-bit mono generator feeding both stereo channels Mono input, stereo output
Maximum power 50 W (excluding monitor) 50 W (excluding monitor) 30 W 26 W (Quadra 605)

All five share a 100–240 VAC automatically configured supply (47–63 Hz for the LC series, 50–60 Hz for the Quadra 605), a case 7.7 × 31.0 × 38.2 cm and a weight of 4.0 kg.[1] The maximum-power figures are the machines' consumption, not supply ratings: the exploded view gives one power supply part, 661-1733, for the whole family.[1]

What it settles

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  • Set the meter to the 10 V DC range and replace the lithium cell if it reads below 3.0 V (p. 107). Apple's part is 742-0011 (p. 112).[1]
  • The LC plays an error chord and the LC II, LC III, LC 475 and Quadra 605 an eight-tone chord for a memory fault; the cures are SIMMs first, then the logic board. A four-tone chord on the LC II points at the hard drive or floppy drive (pp. 20–21).[1]
  • A machine that shuts down or restarts intermittently may be in thermal protection; Apple says to clear the vents and allow 30 to 40 minutes (p. 32). An LC Ethernet card fitted without its standoffs also causes intermittent restarts (pp. 32, 66).[1]
  • The LC and LC II accept 12 MB but recognise only 10 MB (p. 36).[1]
  • On the LC II and LC III, fit the fan logo side down "or the fan may damage the computer" (p. 45).[1]
  • DRAM SIMMs from an LC do not work in an LC III (p. 77). The LC 475 and Quadra 605 share a replacement logic board; a Quadra 605 needs a jumper on J18, which service boards do not include (p. 60).[1]

Exploded view part numbers

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Module part numbers from the exploded view (p. 112)
Part Apple part number
Power supply (all models) 661-1733
Lithium battery 742-0011
VRAM SIMM 661-0722 (256K), 661-1021 (512K)
Floppy drive 661-0474; 661-0121 (manual insert)
Floppy drive carrier 805-0961; 805-5111 (LC)
Internal floppy drive cable 590-0524
Hard drive data cable / power cable 590-0228 / 590-0303
Hard drive carrier 805-0980
Fan (LC II/III) 600-0193
Speaker (LC II/III) 609-0003
Speaker/fan assembly (LC) 630-5058
Top case 630-0505 (LC), 630-0507 (LC II), 922-0199 (LC III), 922-0548 (LC III manual insert), 922-0582 (Quadra 605)
Bottom case 630-0501; 630-0500 (LC); 630-0583 (Quadra 605)
Microphone assembly 076-0430
AC power cable 590-0380

The logic boards, DRAM SIMMs and hard drives are marked with an asterisk referring to a separate parts list, which is not part of this file.[1]

What this manual does not contain

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  • No schematics and no component values. It cannot source a capacitor list for any of these boards; the capacitor guides use Console5 and Recap-a-Mac instead.
  • No rail voltages, rail tolerances or power-supply adjustment. Every power fault in the symptom charts ends in "Replace power supply" or "Replace logic board".
  • No logic board or SIMM part numbers (see above).
  • Nothing on the LC III+ (Performa 460/466/467), although one symptom-chart entry covers a "Networked 33 MHz LC III" that freezes (p. 36).

Pages that cite this document

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Download: Quadra_605.lc_series.pdf (822 KB)

References

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  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Apple Computer, Service Source: Macintosh LC Series/Quadra 605 (1995), File:Quadra 605.lc series.pdf. Page numbers below are PDF page positions.
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