TRS-80 PC-6 Documentation
The Service Manual: Pocket Scientific Computer PC-6 is Tandy's service manual for the TRS-80 PC-6, catalogue number 26-3672, custom manufactured for Radio Shack, a division of Tandy Corporation. The scan has 27 pages: the cover, the contents page, printed pages 3 to 26 and the back cover. It comes from the Floodgap Retrobits Tandy Pocket Computer archive, which has no PC-5 manual and points PC-5 owners to this one.[1]
Contents
[edit | edit source]From the contents page, with printed page numbers:
- Specifications, and how to open the upper case (p. 3)
- Theory of operation: block diagram (p. 4), LSI and RAM map (p. 5), buzzer control, interrupt and keyboard circuits (p. 6), power supply (p. 7)
- LSI pin functions (p. 8)
- Display (p. 9)
- Troubleshooting guide (p. 10), test programs (p. 11) and operation check (p. 14)
- PCB assembly views (p. 19)
- Parts list: electrical parts (p. 20), mechanical parts (p. 21)
- Exploded view and disassembly instructions (p. 23)
- Schematic diagrams: main block (p. 24), keyboard (p. 25), display (p. 26)
What this manual does not contain
[edit | edit source]- Nothing about the PC-5, whose memory and processor versions differ.
- No user instructions for changing the cells, and no BASIC reference; Tandy covered those in the owner's manual, which is not hosted here.
- No information on the 26-3674 RAM pack beyond the RAM map and the insulation seal in the parts list.
- The schematic labels C4 as 0.1 µF next to the RAM, while the parts list groups C1 to C4 as 100 pF chip ceramics.
Pages that cite this document
[edit | edit source]- TRS-80 PC-6 – specifications, chips, power and options
- TRS-80 PC-6 General Maintenance – cells, parts list and disassembly
- TRS-80 PC-6 Troubleshooting Guide – fault table, test programs, operation check and pin functions
- TRS-80 PC-6 Capacitor Replacement Guide – C11 to C13
- TRS-80 PC-5 and its guides, where the PC-6 manual is the nearest documentation
Download: Tandy PC-6 Pocket Scientific Computer Service Manual (26-3672).pdf
References
[edit | edit source]- ↑ Cameron Kaiser, Floodgap Retrobits, Tandy TRS-80 Pocket Computer Archive, gopher://gopher.floodgap.com:70/1/archive/tandy-pocket-computer-archive/manuals (file pc6service.pdf). Retrieved 2026-10-21. The archive's note that it has no PC-5 documentation and that the PC-6 manual should be used.