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Macintosh Quadra 660AV

The Macintosh Quadra 660AV is a 68040-based desktop "pizza-box" computer that was released in October 1993.


Specifications

Spec Details
Released/Discontinued October 1991/September 1994
CPU Motorola 68040 @25MHz
- AT&T 3210 DSP
RAM Type: 4x 72-pin SIMM Slot
Standard: 8MB
Maximum: 68MB
Storage 3.5" SCSI
Standard: 80, 160, or 400MB
Graphics Up to 2MB VRAM
Audio Internal Speaker
Media Drives Auto-inject 3.5" 1.44MB Floppy Drive
Expansion - 2x NuBus Slots
- 1x PDS Slot
Networking AAUI Ethernet
Other I/O - 2x Apple Desktop Bus
- 2x Serial
- 1x DB25 SCSI
- 1x DB15 Video Out
- 1x Line In
- 1x Line Out
PRAM Battery 1/2AA Lithium
Firmware Old World
Minimum Mac OS System Software 7.0.1
Maximum Mac OS Mac OS 8.1

Resources

Link Details
Apple Macintosh Quadra 660AV Service Manual
Apple Macintosh Quadra 660AV Logic Board Schematic
Macintosh Quadra 660AV Capacitor Reference

Upgrades

SSD Upgrade

Check our page on SCSI SSD replacements for more info.


Common Faults & Maintenance

PRAM Battery Leaks

The 1/2AA Lithium PRAM battery in the 660AV is very prone to leaking and should be removed. It does not need to be replaced on this model for the computer to operate.

Capacitors

The 660AV's logic board must be recapped as the original electrolytic capacitors on it practically always fail and leak.

Brittle Plastic

The 660AV's plastic parts are very brittle. The drive bezels and case clips are the most common parts to break.