File:Commodore PET 2001 Main Logic Schematic (320008).pdf
Summary
[edit | edit source]Commodore's three-sheet main logic schematic for the Commodore PET 2001, for board assembly 320008 (6540 ROMs, 6550 RAM).
Sheet 1 is drawing 320130, circuitry common to all PET computers. Sheets 2 and 3 are drawing 320026 and are specific to assembly 320008. Commodore's note on sheet 3 records that all component locations are the same on all four original boards — 320008, 320081, 320132 and 320137 — and that only the specific components differ, with the identifying board number in the upper left corner of the board.
The sheets show the 8 MHz master crystal Y1, the two cassette-motor drivers (2N3904 → 7.2 V zener → 2N4401 → TIP29) fed from the +9 V unregulated rail, and the test points TP2–TP5.
Licensing
[edit | edit source]Author: Commodore Business Machines, Inc.
Licence: Manufacturer service documentation, reproduced here for repair and preservation purposes. Copyright remains with the rights holder. The original sheets carry a 1970s Commodore confidentiality notice, which is of historical interest only.
Source: zimmers.net Commodore PET 2001 schematics archive
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 18:16, 22 September 2026 | 0 × 0 (1.1 MB) | Josh (talk | contribs) | Commodore PET 2001 service documentation from the zimmers.net CBM archive |
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