Macintosh Performa 275
 | |
| Macintosh Color Classic II, the same machine as the Performa 275 with a different badge | |
| Specifications | |
|---|---|
| Manufacturer | Apple Computer, Inc. |
| Type | All-in-one personal computer |
| Released | October 1, 1993 |
| Discontinued | November 1, 1995 (EveryMac) |
| CPU | Motorola 68030 at 33 MHz |
| Memory | 4 MB on board, expandable to 36 MB |
| Storage | 80 or 160 MB SCSI hard drive; 1.4 MB SuperDrive |
| Display | 10-inch Trinitron colour CRT, 512 × 384 |
| Sound | 8-bit mono |
| Dimensions | 37.0 × 25.2 × 32.15 cm (14.5 × 9.9 × 12.6 in) |
| Weight | 10.2–10.5 kg (22.5–23.2 lb) |
| OS / Firmware | System 7.1 – Mac OS 7.6.1 |
| Predecessor | Performa 250 |
| Model no. | M1600 |
The Macintosh Performa 275 is a compact all-in-one Macintosh with a colour screen, introduced on 1 October 1993. It is the Macintosh Color Classic II sold under a Performa name, and was not sold in the United States.[1][2] EveryMac says it was sold only in Asia, and gives the discontinuation date as 1 November 1995 and the Japanese order number as M2498J/A.[3] Apple lists its original system software as J-7.1, the Japanese release of System 7.1, with System Enabler 403.[1]
Specifications
[edit | edit source]| Item | Figure |
|---|---|
| Processor | Motorola 68030 at 33 MHz, 32-bit data path; optional 68882 |
| RAM | 4 MB on board; one 72-pin SIMM socket (1 to 32 MB SIMMs, 80 ns); 36 MB maximum |
| ROM | 1 MB |
| VRAM | 256K built in; 512K with a 256K VRAM SIMM |
| Colour depth | 512 × 384 at 8-bit with 256K; 16-bit with 512K |
| Ports | Two ADB, printer and modem serial, SCSI DB-25, microphone, speaker |
| Expansion | One LC processor-direct slot |
| Electrical | 90–240 V, 47–63 Hz, 100 W maximum; soft power |
| PRAM battery | 3.6 V lithium |
Source: Apple technical specifications.[1]
Apple's Color Classic II/Performa 275 Service Source gives different memory figures: a 16-bit data bus, a dual 30-pin SIMM slot and 10 MB maximum with 100 ns SIMMs. These are the Color Classic's figures, printed unchanged apart from the 33 MHz clock.[4] Apple's technical specifications and EveryMac both give a single 72-pin socket, 80 ns SIMMs and 36 MB.[1][3] Count the sockets on the board before buying memory.
The display is a 10-inch diagonal (9-inch viewable) Trinitron at 512 × 384 and 76 dpi, and the supply is a universal 90–240 VAC unit.[4] Apple's battery rule is to replace the cell below 3.0 V.[5]
Hardware
[edit | edit source]The logic board comes out of the back of the machine once the I/O door is removed. Apple's charts send smoke, power and most picture faults to the analogue board, which holds the power supply and the CRT drive circuits.[6] The CRT and analogue board carry dangerous voltages; discharge the CRT before working inside. See CRT Discharge Procedure.
Known faults
[edit | edit source]Faults, capacitor lists and repairs are those of the Color Classic II:
- Macintosh Color Classic II Troubleshooting
- Macintosh Color Classic II Capacitor Replacement Guide
- Macintosh Color Classic II General Maintenance
- Macintosh Performa 275 Troubleshooting
Service documentation
[edit | edit source]Apple's Color Classic II/Performa 275 Service Source is hosted at Macintosh Color Classic II/ Performa 275 Service Source (137 pages). Its Adjustments chapter covers geometry, video, convergence, yoke and the light meter; it has no power-supply adjustment.[4]
Related pages
[edit | edit source]References
[edit | edit source]- ↑ 1.0 1.1 1.2 1.3 Apple, "Macintosh Performa 275: Technical Specifications".
- ↑ Low End Mac, "Apple's Performa Line, 1992 to 1997".
- ↑ 3.0 3.1 EveryMac, "Macintosh Performa 275 Specs".
- ↑ 4.0 4.1 4.2 Apple Computer, Service Source: Macintosh Color Classic II/Performa 275, Specifications, PDF pp. 6–8, File:Color classic ii.perf 275.pdf; see Macintosh Color Classic II/ Performa 275 Service Source.
- ↑ Apple Computer, Service Source: Macintosh Color Classic II/Performa 275, Battery Verification, PDF p. 91, File:Color classic ii.perf 275.pdf.
- ↑ Apple Computer, Service Source: Macintosh Color Classic II/Performa 275, Symptom Charts and Take Apart, PDF pp. 19–39, File:Color classic ii.perf 275.pdf.