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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) | ||||
| 17:26 | Upload log 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) | ||||
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) | ||||