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23 September 2026
| 20:15 | Sinclair ZX Spectrum Keyboard Membrane Repair diffhist +4,114 Josh talk contribs (Remove the live ChatGPT citation placeholder; the 22k/R68 STOP fix is real but is step 5 of Sinclair's Spectrum-to-Spectrum+ conversion (and is RP1 pins 1-5 on an Issue 1 board), now cited to the service manual; add Sinclair's block-of-five/block-of-eight fault rule, the section 10.3 assembly figures, the foam pads and the dual-contact keys; fix markdown numbering, the H1 title, the red links and the non-existent categories) | ||||
| 20:13 | Sinclair ZX81 diffhist +2,453 Josh talk contribs (Cite to Sinclair's ZX81 Service and Assembly Manual and circuit diagram SRC 049; ROM is 8 KB (infobox said 4 KB, contradicting the body), CPU clock is 3.25 MHz on every issue, X1 is a 6.5 MHz ceramic filter; remove the unsourced Issue 1/2 errata table, the Kansas City Standard tape claim, the 27 s/KB loading figure, the truncated 40-way pinout table and the wrong ROM keyword map) | ||||
| 05:05 | Template:Infobox computer diffhist +1,001 Josh talk contribs (Add the parameters pages were already passing but the template silently discarded - interface (37 pages), compatible (37), released (15), power (12), connectivity (10), graphics (9), input, rom, expansion, fpu, media, ports - plus alias handling and a parameter list, so that content reaches readers and refs defined in those fields stop vanishing) | ||||
22 September 2026
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17:56 | Sinclair ZX Spectrum Capacitor Replacement Guide 2 changes history +15,925 [Josh (2×)] | |||
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17:56 (cur | prev) +161 Josh talk contribs (Flag the Issue 5 C29 "44nf" misprint in the table itself rather than silently normalising it to 47 nF) | ||||
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17:50 (cur | prev) +15,764 Josh talk contribs (Rebuild from Sinclair ZX Spectrum Service Manual parts lists 8.5 and 9.13: previous C1-C12/C27 table and its "Purpose/Rail" column were not Sinclair designators and are removed; real per-issue capacitor table added for Issues 2-6A; fabricated 128K table, ripple figures, height/lead-pitch figures and "-5V/+12V are 128K rails" error removed; refs added; Unverified data cleared) | ||||
| 17:54 | Sinclair ZX Spectrum Troubleshooting Guide diffhist +13,724 Josh talk contribs (Rebuild from Sinclair ZX Spectrum Service Manual sections 3-9: removed the non-existent 7812/+12V regulator input rail, corrected ROM from 8K to 16K, corrected RESET from edge pin 16 to 20A, corrected ULA Vcc to pin 14; removed unsourced 128K/+2/+3 RAM figures (wrong, and covered by their own pages); added Sinclair basic-check table, memory check and RAM bit-to-IC table, TR4 inverter failure, LM1889 pin signals and self-inflicted faults; refs added; Unverified data cleared) | ||||
| 17:52 | Sinclair ZX Spectrum General Maintenance diffhist +16,120 Josh talk contribs (Rebuild against Sinclair ZX Spectrum Service Manual: ULA Vcc corrected to pin 14 (pin 40 is ground); PSU corrected to 9V centre-negative UK1400 and the wrong "9.0-10.5V unloaded" band removed; -5V test point corrected from TR4 collector to IC6 pin 1; unsourced 10-15 year recap interval, Ray Carlsen PSU and ULA pin 28 audio claim removed; 7K010E removed from the 48K ULA list; broken image and non-existent category fixed; refs added; Unverified data cleared) | ||||
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17:47 | (Upload log) [Josh (3×)] | |||
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17:47 Josh talk contribs uploaded File:ZXspectrum mb.jpg (ZX Spectrum 48K Issue 3B board photo (CC BY-SA 3.0, Bill Bertram) - fixes broken image link on Sinclair ZX Spectrum General Maintenance) | ||||
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17:28 Josh talk contribs uploaded File:Sinclair ZX Spectrum Issue 3 circuit diagram.png (Sinclair ZX Spectrum Issue 3 circuit diagram) | ||||
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17:26 Josh talk contribs uploaded File:Sinclair ZX Spectrum Service Manual.pdf (ZX Spectrum / Spectrum+ Service Manual with Supplements 1 and 2 — source for the Spectrum repair pages) | ||||
| N 17:28 | Sinclair ZX Spectrum Service Manual diffhist +3,470 Josh talk contribs (Create documentation page for the newly hosted ZX Spectrum Service Manual) | ||||
21 September 2026
| 21:53 | Sinclair ZX Spectrum Troubleshooting Guide diffhist +20 Josh talk contribs (Verification drive: flag unverified component data pending check against a primary source) | ||||
| 21:53 | Sinclair ZX Spectrum General Maintenance diffhist +20 Josh talk contribs (Verification drive: flag unverified component data pending check against a primary source) | ||||
| 21:53 | Sinclair ZX Spectrum Capacitor Replacement Guide diffhist +20 Josh talk contribs (Verification drive: flag unverified component data pending check against a primary source) | ||||