File:Acorn Archimedes 500 Series and R200 Series circuit diagrams.pdf

Twelve Acorn drawings for the Archimedes 540 and the R225 and R260, scanned at 400 dpi and joined into one PDF in this order: main PCB circuit diagram 0186,000 sheets 1 to 5 (MEMC, ROM and ARM interface; video and audio; I/O system; DRAM; power and ground table), main PCB assembly 0186,000/A, 4 MB RAM card 0186,002, ARM3 CPU PGA card 0186,104, backplane 0186,001, keyboard 0186,900, Ethernet II expansion card 0173,070 and SCSI expansion card (issue 2+) 0173,010. Most carry a 1990 copyright. These are the drawings missing from the hosted Acorn Archimedes 500 Series and R200 Series Service Manual. Described on Acorn R200 Series Documentation.

https://chrisacorns.computinghistory.org.uk/docs/Acorn/Manuals/Acorn_A500R200TRM_Drawings.zip (Chris's Acorns, "Archimedes 500 Acorn R200 Technical Reference Manual technical drawings"), retrieved 2026-10-02; the twelve single-page PDFs were joined without re-encoding.

Acorn Computers Limited.

Copyright Acorn Computers Limited 1990. Hosted for preservation and repair reference, with the source cited.