Commodore PET 4000 Series Technical Manual
The Commodore 4000 Series Technical Manual, Model 4016/4032 is Commodore's 76-page technical manual, part number P/N 990438. It is a package of engineering drawings (drawing trees, assembly drawings, parts lists, schematics, wiring diagrams and waveform sheets) with no narrative text. It belongs to the same numbered series as the C64 manual (990439) and the VIC-20 manual (990440).
The scan carries no text layer.
Machines covered
[edit | edit source]The cover names the 4016 and 4032. The drawings inside cover three logic boards, each with its own parts list and schematic. The first is the universal dynamic PET board, drawing 8032090, "PCB ASSY - UNIV. DYNAMIC PET", seven sheets, and its dash numbers are:
| Part number | Description as printed |
|---|---|
| 8032090-01 | Univ. Dynamic PET 8032 – 60 Hz |
| 8032090-03 | Univ. Dynamic PET 4032 – 60 Hz (12") |
| 8032090-05 | Univ. Dynamic PET 4016 – 60 Hz |
| 8032090-07 | Univ. SuperPET 9000 – 60 Hz |
| 8032090-09 | Univ. SuperPET combo-board 9000 – 60 Hz |
| 8032090-11 | Univ. Dynamic PET 4032 – 9" – 60 Hz |
The same board, in different build configurations, serves the 8032, the 4032 in 9-inch and 12-inch cabinets, the 4016 and the SuperPET 9000.
The second is another universal dynamic PET board, 8032080 Rev J, with dash numbers -01 (8032), -03 (4032), -05 (4016) and -07 (9000), all 60 Hz (PDF p. 20). The third is the earlier dynamic PET board 320351 Rev AL, listed in 8K, 16K and 32K graphic and business builds, some with an internal cassette, as dash numbers -01 to -12 (PDF p. 62). The three boards have different capacitor and regulator complements, so a designator taken from this manual needs the board number with it.
The revision block on that drawing runs from "Production Release" through revisions B to H, each tied to a Commodore ECO number (2157, 2172, 2237, 2308, 2414, 2565 and 2555, 2887, 3027).
Contents
[edit | edit source]- PDF pp. 3-7: parts list for drawing 8032090, including the regulators VR1 (7905), VR2 (7812) and VR4 (LM323), crystal Y1 (16 MHz), the CRT controller at UB13, the 6502 at UB14, the piezo transducer MT1 and the electrolytics C1, C2 (470 µF 16 V), C5 (4700 µF 25 V), C7, C11, C16, C17, C23 and C24.
- PDF pp. 9-19: logic diagram 8032087 Rev C, eleven sheets, for the 8032090 board.
- PDF pp. 20-25: parts list and assembly drawing for board 8032080 Rev J.
- PDF pp. 26-36: logic diagram 8032081 Rev E, eleven sheets, for the 8032080 board. Sheet 11 (p. 36) is the regulator sheet: VR1 (7905), VR2 (7812) and two LM340-5 +5 V regulators, VR3 and VR4.
- PDF p. 37: business keyboard, 73 stations, drawing 320284.
- Power supply assembly 8032051, three sheets (PDF pp. 38-40), with its parts list on PDF p. 39 (transformer, 23,000 µF filter capacitor, fuse 125 V slow-blow 1.6 A, fuse holder, rocker switch), a wiring diagram and Table I (PDF p. 40) giving the transformer secondary tapping by cabinet: terminals 9 and 10 for 15 V to the 9-inch video, terminals 9 and 11 for 21 V to the 12-inch video. The drawing names the machines it is used on (8032, 8016).
- PDF p. 41: PCB schematic for the 12-inch CRT display, drawing 321448 Rev A.
- Assembly drawings and rework notes, including FCC-compliance jumper instructions and a part substitution index reference, P/N 321233.
- PDF pp. 42-51: PCB waveforms for the 12-inch CRT display, drawing 321450, ten sheets.
- PDF pp. 52-61: PCB waveforms for the 9-inch CRT display, drawing 321447, ten sheets.
- PDF pp. 62-67: parts list and assembly drawing for the dynamic PET board 320351 Rev AL.
- PDF pp. 68-75: logic diagram 320349 Rev E for the 320351 board, sheets 1 to 8 of 9.
- PDF p. 76: display assembly schematic 320032 Rev A, for the 9-inch tube.
What this manual settles
[edit | edit source]- The 9-inch and 12-inch PETs take different transformer taps, 15 V and 21 V, from the same supply assembly.
- There is more than one "4000 series" logic board. The manual covers the universal dynamic boards 8032090 and 8032080, whose dash numbers include the 4016, 4032, 8032 and SuperPET 9000 builds, and the earlier dynamic PET board 320351, listed by memory size and by graphic or business keyboard.
- The regulators are on the logic board, not the supply chassis. Board 8032090 has three, with an LM323 (VR4) for +5 V; board 8032080 has four, with two LM340-5 regulators (VR3, VR4) for +5 V.
- The revision history ties each board change to a Commodore ECO number, which is how a board's vintage can be placed.
What this manual does not contain
[edit | edit source]- No coverage of the original PET 2001 static board, a different design; see Commodore PET 2001 Service Documentation.
- No troubleshooting guide, circuit theory or symptom tables.
- No text layer, so every value must be read from the drawings.
- Any 50 Hz build of the universal boards: every 8032090 and 8032080 dash number is a 60 Hz build. The 320351 dash numbers give no mains frequency.
- Sheet 9 of logic diagram 320349.
Pages that cite this document
[edit | edit source]- Commodore PET 4000 Series: regulators, supply chassis, capacitors, crystal
- Commodore PET 4000 Series Maintenance Guide: rails and capacitor list
- Commodore PET 4000 Series Troubleshooting Guide: regulators, CRTC position, waveform drawings
- Commodore PET 4000 Series Capacitor Guide: logic board electrolytics and the supply chassis filter capacitor
- Commodore PET 4000 Series Display Board Documentation: display builds and transformer taps
- Commodore PET 2001 Service Documentation