File:BBC Micro Model A-B power supply circuit diagram (service manual 9.7).png
Summary
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Acorn's circuit diagram of the switch-mode power supply used in the BBC Microcomputer Models A and B, from section 9.7 of the BBC Microcomputer Service Manual (part no. 0433,001, issue 1, October 1985, Section 1, PDF page 89). The page has been turned through 90 degrees so that it reads left to right, and scaled down. Some resistor values are handwritten on the original drawing.
Source
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Rendered from the scan of the service manual published at Chris's Acorns, https://chrisacorns.computinghistory.org.uk/docs/Acorn/Manuals/Acorn_BBCSMOct85_Sec1.pdf (retrieved 2026-10-25), the same file hosted here as File:BBC Microcomputer Service Manual October 1985.pdf.
Author
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Acorn Computers Limited.
Licence
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Copyright Acorn Computers Limited, 1985. Hosted for preservation and repair reference, with the source cited. Not freely licensed.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:42, 25 October 2026 | | 2,200 × 1,075 (175 KB) | Josh (talk | contribs) | Upload for repair guide |
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