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25 September 2026
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08:54 | Recommended Tools 2 changes history +2,697 [Josh (2×)] | |||
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08:54 (cur | prev) +1,439 Josh talk contribs (P4 verification: cite Apple's own equipment lists: the LaserWriter Technical Procedures bench requirements and the light meter specified for the all-in-one video adjustments) | ||||
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07:58 (cur | prev) +1,258 Josh talk contribs (cite Apple TechStep, the Chilton repair guide and the OneScanner volume (P4 orphan fix)) | ||||
| 08:54 | Capacitor Failure Symptoms diffhist +1,692 Josh talk contribs (P4 verification: add worked examples of ESR-rise and RIFA failure from the two hosted Pina books, with the U.S./International designator warning) | ||||
23 September 2026
| 20:16 | Sinclair ZX Spectrum+ Capacitor Replacement Guide diffhist +3,970 Josh talk contribs (Replace the Issue 2/3 capacitor table (section 8.5) with Sinclair's own section 9.13 list for the Issue 4A/4B/5/6A boards the Spectrum+ actually uses - C1-C8 are 22 nF not 47 nF, C49 is 560 pF not 47 nF, and C54-C105 were missing entirely; C27 is Electrolytic 1 uF 50 V, not Ceramic; add the section 9.12.1 notes and the KTC2236A-Y TR4 pinout trap) | ||||
| 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) | ||||
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02:25 | Recommended Tools 2 changes history +7,999 [Josh (2×)] | |||
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02:25 (cur | prev) +183 Josh talk contribs (Add a topical image (page had none)) | ||||
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02:11 (cur | prev) +7,816 Josh talk contribs (Rewrite and verify every named product: corrected Retro Chip Tester (standalone 8Bit-Museum instrument, not a TL866 add-on) with its real capabilities; corrected ESD mat/strap earthing to require a current-limiting resistor per ANSI/ESD S1.1 (a direct bond to mains earth is dangerous); removed insulated gloves as CRT protection in favour of goggles and the correct discharge tooling; replaced the unsourced 20-50 MHz scope rule with edge-speed reasoning; added sourced solder melting points (Kes...) | ||||
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02:15 | Capacitor Failure Symptoms 2 changes history +12,684 [Josh (2×)] | |||
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02:15 (cur | prev) −40 Josh talk contribs (Remove self-referential wording per house rule) | ||||
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02:07 (cur | prev) +12,724 Josh talk contribs (Rewrite with full citations (Nichicon CAT.8101H hosted here, Vishay 40110, KEMET F3011): corrected 60 Hz hum to twice mains frequency, corrected bulging mechanism to Nichicon gas generation, added missing film/X2 suppression section, added tantalum derating 60-50 percent, added Class II ceramic DC-bias behaviour, replaced Japanese-brand rule with no-datasheet-no-purchase, replaced IPA-only cleanup with Nichicon soap-and-water plus never acidic/alkaline, replaced reforming folklore with Nichic...) | ||||
22 September 2026
| 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) | ||||