Macintosh Classic II
 | |
| Macintosh Classic II | |
| Specifications | |
|---|---|
| Manufacturer | Apple Computer, Inc. |
| Type | Personal computer |
| Released | 21 October 1991 |
| Discontinued | 13 September 1993 |
| Intro price | US$1,899 |
| CPU | Motorola 68030 @ 16 MHz, 16-bit external data bus |
| Memory | 2 MB soldered, expandable to 10 MB (two 30-pin SIMMs, 120 ns or faster) |
| Storage | Internal 1.4 MB floppy drive; internal 40 or 80 MB SCSI hard disk |
| Display | 9-inch monochrome CRT, 512 × 342 pixels |
| Sound | Monophonic, 8-bit D/A conversion, 22 kHz sampling; built-in microphone |
| ROM | 512 KB |
| Ports / interface | 1 × ADB; DB-19 external floppy; DB-25 SCSI; 2 × RS-422 serial; sound in and out |
| Expansion | None |
| Power | 100–120 V AC, 47–63 Hz, 100 W maximum |
| Dimensions | 13.2 in H × 9.7 in W × 11.2 in D (33.6 × 24.6 × 28.5 cm) |
| Weight | 16–17.1 lb (7.3–7.8 kg) without a hard disk |
| OS / Firmware | System 6.0.8L – System 7.6.1 |
| Predecessor | Macintosh Classic |
| Successor | Macintosh Color Classic |
| Codename | Apollo, Montana |
| Model no. | M4150 |
The Macintosh Classic II was introduced on 21 October 1991 and is the last 9-inch monochrome compact Macintosh. Apple also sold it as the Performa 200 from September 1992, and services all three names from one manual.[1][2]
It replaced the Macintosh SE/30 and is slower than it, despite using the same 68030 at the same clock: the Classic II's logic board is derived from the LC and carries a 16-bit external data bus, and it has no expansion slot.[1][2]
Specifications
[edit | edit source]Apple's own specification pages.[1]
| Item | Specification |
|---|---|
| CPU | Motorola 68030, 16 MHz, 32-bit internal data bus, 256-byte instruction and data caches |
| RAM | 2 MB, expandable to 10 MB (120 ns or faster SIMMs) |
| ROM | 512 KB |
| PRAM | 256 bytes |
| SIMM sockets | Two, 30-pin, on the logic board |
| Floppy | Internal 1.4 MB; optional external 800 KB or 1.4 MB |
| Hard disk | Internal 40 MB or 80 MB; external SCSI supported |
| Microphone | Electret, omnidirectional; output 4 mV peak to peak at normal volume |
| ADB | One port, mini-DIN-4 |
| Serial | Two RS-422 ports, mini-DIN-8 |
| Sound | Monophonic, 8-bit D/A conversion, 22 kHz sampling; can drive stereo headphones through the sound jack |
| Video | 9-inch diagonal, 512 × 342 bit-mapped monochrome |
| Line voltage | 100–120 V AC |
| Frequency | 47–63 Hz, single phase |
| Maximum power | 100 W |
| Dimensions | 13.2 × 9.7 × 11.2 in (33.6 × 24.6 × 28.5 cm) |
| Weight | 16–17.1 lb (7.3–7.8 kg), excluding an internal hard disk |
Memory
[edit | edit source]2 MB soldered plus two 30-pin SIMM sockets on the logic board, filled as an identical pair: 4 MB with a pair of 1 MB modules, 10 MB with a pair of 4 MB modules. 120 ns or faster, eight-chip, non-parity.[1] Full procedure: Macintosh Classic II Memory Upgrade Guide.
Apple's Sad Mac chart for this machine says to replace the pair of SIMMs before replacing the logic board.[1]
Upgrade from a Classic
[edit | edit source]Apple sold a Classic II upgrade kit for the Macintosh Classic: a Classic II logic board, a Classic II rear cover, a microphone and an accessory kit. The instruction that went with it was to record the original serial number onto the new rear housing.[1]
Service manual and schematics
[edit | edit source]Apple service manual
[edit | edit source]
All the Apple service manuals are on the Apple Service Source page.
Logic board and analogue board
[edit | edit source]| Logic board | Analogue board |
|---|---|
 |
 |
Maintenance, capacitors and troubleshooting
[edit | edit source]The Classic II logic board carries surface-mount electrolytic capacitors and suffers the usual leakage and trace corrosion; recapping is the first job on any machine that has sat unused. Values and positions are on the Macintosh Classic II Capacitor Replacement Guide.
The Classic II analogue board exists in 110 V and 220–240 V versions, and their reservoir capacitors are not the same part. Work from the table for the board in front of you — a capacitor rated for the 110 V board on a 240 V board sits on a bus that rectifies to roughly 340 V.
- Macintosh Classic / Classic II General Maintenance — cleaning, the 3.6 V lithium cell and its 3.0 V replacement threshold.
- Macintosh Classic / Classic II Troubleshooting — symptom-led diagnosis.
- CRT Discharge Procedure — read before opening the case.
- Retrobrite — for the yellowed case.
Apple publishes no rail tolerance and no power-supply adjustment for this machine; its Adjustments chapter is video and yoke work only.[1] The Dead Mac Scrolls does not cover the Classic II either, so board references quoted for it from that book have been transplanted from another model.[3]
Sad Mac codes are decoded on Sad Mac Error Codes and with the Sad Mac Decoder.
Related pages
[edit | edit source]- Macintosh Classic
- Macintosh SE/30 — the machine it replaced
- Macintosh Color Classic
References
[edit | edit source]- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Apple Computer, Macintosh Classic/Classic II/Performa 200 Service Source — Specifications, Troubleshooting, Upgrades, Adjustments and Additional Procedures chapters. Hosted on this wiki: File:Classic ii.performa 200.pdf.
- ↑ 2.0 2.1 Low End Mac, Mac Classic II tech specs (secondary source, used for dates, prices, codenames and the motherboard lineage).
- ↑ Larry Pina, The Dead Mac Scrolls, Peachpit Press, 1992, introduction: the Classic and Classic II "aren't covered at all in this edition". Hosted on this wiki: File:The Dead Mac Scrolls 1992.pdf.