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21:00, 17 June 2026 Josh talk contribs created page Acorn A3010, A3020 and A4000 Technical Reference Manual (Create Acorn A3000/A4000 manual page (host PDF on-wiki, PDFEmbed))
21:00, 17 June 2026 Josh talk contribs created page Acorn A3010, A3020 and A4000 Service Manual (Create Acorn A3000/A4000 manual page (host PDF on-wiki, PDFEmbed))
21:00, 17 June 2026 Josh talk contribs created page Acorn A3000 Technical Reference Manual (Create Acorn A3000/A4000 manual page (host PDF on-wiki, PDFEmbed))
21:00, 17 June 2026 Josh talk contribs created page Acorn A3000 Service Manual (Create Acorn A3000/A4000 manual page (host PDF on-wiki, PDFEmbed))
20:59, 17 June 2026 Josh talk contribs created page File:Acorn A3010 A3020 A4000 Training Reference Manual.pdf (Acorn A3010, A3020 and A4000 Training Reference Manual (1993), Acorn Computers. Dealer training reference: architecture, PSU design and servicing overview. Source PDF: Internet Archive. Category:Acorn Service Manuals)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn A3010 A3020 A4000 Training Reference Manual.pdf (Acorn A3010, A3020 and A4000 Training Reference Manual (1993), Acorn Computers. Dealer training reference: architecture, PSU design and servicing overview. Source PDF: Internet Archive. Category:Acorn Service Manuals)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn A3010 A3020 A4000 Technical Reference Manual.pdf (Acorn A3010, A3020 and A4000 Technical Reference Manual, Acorn Computers. Hardware reference and main-PCB circuit diagrams (Roadrunner board). Source PDF: Chris's Acorns (Chris Whytehead collection), The Centre for Computing History. Category:Acorn Service Manuals)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn A3010 A3020 A4000 Technical Reference Manual.pdf (Acorn A3010, A3020 and A4000 Technical Reference Manual, Acorn Computers. Hardware reference and main-PCB circuit diagrams (Roadrunner board). Source PDF: Chris's Acorns (Chris Whytehead collection), The Centre for Computing History. Category:Acorn Service Manuals)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn A3010 A3020 A4000 Service Manual.pdf (Acorn A3010, A3020 and A4000 Module Level Service Manual, Acorn Computers. Module-level fault diagnosis, disassembly, functional and safety test procedures. Source PDF: Chris's Acorns (Chris Whytehead collection), The Centre for Computing History. Category:Acorn Service Manuals)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn A3010 A3020 A4000 Service Manual.pdf (Acorn A3010, A3020 and A4000 Module Level Service Manual, Acorn Computers. Module-level fault diagnosis, disassembly, functional and safety test procedures. Source PDF: Chris's Acorns (Chris Whytehead collection), The Centre for Computing History. Category:Acorn Service Manuals)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn A3000 Technical Reference Manual.pdf (Acorn A3000 Technical Reference Manual, Acorn Computers. Hardware reference and main-PCB circuit diagrams. Source PDF: Chris's Acorns (Chris Whytehead collection), The Centre for Computing History. Category:Acorn Service Manuals)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn A3000 Technical Reference Manual.pdf (Acorn A3000 Technical Reference Manual, Acorn Computers. Hardware reference and main-PCB circuit diagrams. Source PDF: Chris's Acorns (Chris Whytehead collection), The Centre for Computing History. Category:Acorn Service Manuals)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn A3000 Service Manual.pdf (Acorn A3000 Service Manual, Acorn Computers. Component-level service manual: system description, fault diagnosis, main-PCB repair and full parts list. Source PDF: Chris's Acorns (Chris Whytehead collection), The Centre for Computing History. Category:Acorn Service Manuals)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn A3000 Service Manual.pdf (Acorn A3000 Service Manual, Acorn Computers. Component-level service manual: system description, fault diagnosis, main-PCB repair and full parts list. Source PDF: Chris's Acorns (Chris Whytehead collection), The Centre for Computing History. Category:Acorn Service Manuals)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn Archimedes A4000 circuit diagram (3 of 3).png (Acorn Archimedes A4000 ("Roadrunner") main PCB circuit diagram, sheet 3 of 3. Greyscale scan, downscaled. Source: The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn Archimedes A4000 circuit diagram (3 of 3).png (Acorn Archimedes A4000 ("Roadrunner") main PCB circuit diagram, sheet 3 of 3. Greyscale scan, downscaled. Source: The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn Archimedes A4000 circuit diagram (2 of 3).png (Acorn Archimedes A4000 ("Roadrunner") main PCB circuit diagram, sheet 2 of 3. Greyscale scan, downscaled. Source: The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn Archimedes A4000 circuit diagram (2 of 3).png (Acorn Archimedes A4000 ("Roadrunner") main PCB circuit diagram, sheet 2 of 3. Greyscale scan, downscaled. Source: The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn Archimedes A4000 circuit diagram (1 of 3).png (Acorn Archimedes A4000 ("Roadrunner") main PCB circuit diagram, sheet 1 of 3 (from the A3010/A3020/A4000 Technical Reference Manual). Greyscale scan, downscaled. Source: The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn Archimedes A4000 circuit diagram (1 of 3).png (Acorn Archimedes A4000 ("Roadrunner") main PCB circuit diagram, sheet 1 of 3 (from the A3010/A3020/A4000 Technical Reference Manual). Greyscale scan, downscaled. Source: The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn Archimedes A3000 circuit diagram (2 of 2).png (Acorn Archimedes A3000 main PCB circuit diagram, sheet 2 of 2 (from the A3000 Technical Reference Manual). Greyscale scan, downscaled. Source: The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn Archimedes A3000 circuit diagram (2 of 2).png (Acorn Archimedes A3000 main PCB circuit diagram, sheet 2 of 2 (from the A3000 Technical Reference Manual). Greyscale scan, downscaled. Source: The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn Archimedes A3000 circuit diagram (1 of 2).png (Acorn Archimedes A3000 main PCB circuit diagram, sheet 1 of 2 (from the A3000 Technical Reference Manual). Greyscale scan, downscaled. Source: The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn Archimedes A3000 circuit diagram (1 of 2).png (Acorn Archimedes A3000 main PCB circuit diagram, sheet 1 of 2 (from the A3000 Technical Reference Manual). Greyscale scan, downscaled. Source: The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn Archimedes A4000 motherboard.jpg (Acorn Archimedes A4000 main PCB ("Roadrunner", part 0194,600) showing the integrated ARM250, two RISC OS ROMs, RAM with expansion cards, and the IDE/floppy connectors. Source: Chris's Acorns, The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn Archimedes A4000 motherboard.jpg (Acorn Archimedes A4000 main PCB ("Roadrunner", part 0194,600) showing the integrated ARM250, two RISC OS ROMs, RAM with expansion cards, and the IDE/floppy connectors. Source: Chris's Acorns, The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs created page File:Acorn Archimedes A3000 motherboard.jpg (Acorn Archimedes A3000 main PCB (Issue 3), part no. 0180,000, with add-ons removed: ARM2, MEMC1a, VIDC1a, IOC, four RISC OS ROMs and the CMOS battery (bottom left). Source: Chris's Acorns, The Centre for Computing History (Chris Whytehead collection).)
20:59, 17 June 2026 Josh talk contribs uploaded File:Acorn Archimedes A3000 motherboard.jpg (Acorn Archimedes A3000 main PCB (Issue 3), part no. 0180,000, with add-ons removed: ARM2, MEMC1a, VIDC1a, IOC, four RISC OS ROMs and the CMOS battery (bottom left). Source: Chris's Acorns, The Centre for Computing History (Chris Whytehead collection).)
18:18, 17 June 2026 Josh talk contribs created page Acorn Electron Capacitor Replacement Guide (Create: capacitor list + recap procedure (from Electron Service Manual))
18:17, 17 June 2026 Josh talk contribs created page Acorn Electron Troubleshooting Guide (Create: detailed component-level troubleshooting guide (cited))
18:17, 17 June 2026 Josh talk contribs created page Acorn Electron Maintenance Guide (Create: detailed maintenance guide (sourced from Electron Service Manual; cited))
18:17, 17 June 2026 Josh talk contribs created page Acorn Atom Capacitor Replacement Guide (Create: capacitor list + recap procedure (from Atom Technical Manual))
18:17, 17 June 2026 Josh talk contribs created page Acorn Atom Troubleshooting Guide (Create: detailed component-level troubleshooting guide (cited))
18:17, 17 June 2026 Josh talk contribs created page Acorn Atom General Maintenance (Create: detailed maintenance guide (sourced from Acorn Atom Technical Manual; cited))
18:15, 17 June 2026 Josh talk contribs created page Category:Acorn Service Manuals (Create Acorn service-manual page (host PDF on-wiki, PDFEmbed))
18:15, 17 June 2026 Josh talk contribs created page Acorn Electron Service Manual (Create Acorn service-manual page (host PDF on-wiki, PDFEmbed))
18:15, 17 June 2026 Josh talk contribs created page Acorn Atom Technical Manual (Create Acorn service-manual page (host PDF on-wiki, PDFEmbed))
18:15, 17 June 2026 Josh talk contribs created page File:Acorn Electron Service Manual.pdf (Acorn Electron Service Manual (Part no. 0405001, Issue 2, January 1987), Acorn Computers. Dealer service manual: circuit description, ULA pin functions, fault-finding, power-supply specs and full main-PCB parts list. Source PDF: Chris's Acorns (Chris Whytehead collection) / The Centre for Computing History. Category:Acorn Service Manuals)
18:15, 17 June 2026 Josh talk contribs uploaded File:Acorn Electron Service Manual.pdf (Acorn Electron Service Manual (Part no. 0405001, Issue 2, January 1987), Acorn Computers. Dealer service manual: circuit description, ULA pin functions, fault-finding, power-supply specs and full main-PCB parts list. Source PDF: Chris's Acorns (Chris Whytehead collection) / The Centre for Computing History. Category:Acorn Service Manuals)
18:15, 17 June 2026 Josh talk contribs created page File:Acorn Atom Technical Manual.pdf (Acorn Atom Technical Manual (Issue 2, October 1980), Acorn Computers. Construction and reference manual: parts list, component layout, circuit description, power supply and memory map. Source PDF: Chris's Acorns (Chris Whytehead collection) / The Centre for Computing History. Category:Acorn Service Manuals)
18:15, 17 June 2026 Josh talk contribs uploaded File:Acorn Atom Technical Manual.pdf (Acorn Atom Technical Manual (Issue 2, October 1980), Acorn Computers. Construction and reference manual: parts list, component layout, circuit description, power supply and memory map. Source PDF: Chris's Acorns (Chris Whytehead collection) / The Centre for Computing History. Category:Acorn Service Manuals)
18:02, 17 June 2026 Josh talk contribs created page File:Acorn Electron circuit diagram.png (Acorn Electron main PCB circuit diagram, Acorn drawing no. 105,000-C. Greyscale scan, downscaled. Source: 4corn Computers, scanned with assistance of The Centre for Computing History.)
18:02, 17 June 2026 Josh talk contribs uploaded File:Acorn Electron circuit diagram.png (Acorn Electron main PCB circuit diagram, Acorn drawing no. 105,000-C. Greyscale scan, downscaled. Source: 4corn Computers, scanned with assistance of The Centre for Computing History.)
18:02, 17 June 2026 Josh talk contribs created page File:Acorn Atom circuit diagram.png (Acorn Atom microcomputer circuit diagram, Acorn drawing no. 102,000-C. Greyscale scan, downscaled. Source: 4corn Computers, scanned with assistance of The Centre for Computing History.)
18:02, 17 June 2026 Josh talk contribs uploaded File:Acorn Atom circuit diagram.png (Acorn Atom microcomputer circuit diagram, Acorn drawing no. 102,000-C. Greyscale scan, downscaled. Source: 4corn Computers, scanned with assistance of The Centre for Computing History.)
18:02, 17 June 2026 Josh talk contribs created page File:Acorn Electron motherboard.jpg (Acorn Electron opened, showing the Issue 4 main PCB in the case base and the Ferranti ULA (the pale rectangle, centre). Source: Chris's Acorns (Chris Whytehead collection), hosted by The Centre for Computing History.)
18:02, 17 June 2026 Josh talk contribs uploaded File:Acorn Electron motherboard.jpg (Acorn Electron opened, showing the Issue 4 main PCB in the case base and the Ferranti ULA (the pale rectangle, centre). Source: Chris's Acorns (Chris Whytehead collection), hosted by The Centre for Computing History.)
18:02, 17 June 2026 Josh talk contribs created page File:Acorn Atom motherboard layout.jpg (Acorn Atom motherboard component-location diagram showing the positions of the ICs. Source: The Acorn Atom Review, via Chris's Acorns / The Centre for Computing History.)
18:02, 17 June 2026 Josh talk contribs uploaded File:Acorn Atom motherboard layout.jpg (Acorn Atom motherboard component-location diagram showing the positions of the ICs. Source: The Acorn Atom Review, via Chris's Acorns / The Centre for Computing History.)
18:02, 17 June 2026 Josh talk contribs created page File:Acorn Atom motherboard.jpg (Acorn Atom main PCB in base (unexpanded) configuration, board part no. 202,000 Issue 4, showing the empty expansion sockets. Source: Chris's Acorns (Chris Whytehead collection), hosted by The Centre for Computing History.)