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27 September 2026
| 10:43 | IBM PCjr Troubleshooting Guide diffhist −1,519 Josh talk contribs (Structural and content repair: remove emoji from section headings; merge the duplicated References section (the trailing bare bullet list is now named inline refs); de-duplicate the tripled/quadrupled ref definitions that produced visible cite errors; rewrite the bolted-on power-supply and CMOS blocks so they describe this machine (the Dallas DS1287/DS12887 claim and, where applicable, the PC/XT minimum-load sentence did not apply here)) | ||||
| 08:59 | IBM PCjr Capacitor Replacement Guide diffhist +39 Josh talk contribs (Link the documentation page for each cited manual, keeping the File: link as the direct download) | ||||
25 September 2026
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00:20 | IBM PCjr 2 changes history +46 [Josh (2×)] | |||
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00:20 (cur | prev) −76 Josh talk contribs (P4 verification: remove the now-duplicated manual link bullet (superseded by the fuller documentation line)) | ||||
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00:19 (cur | prev) +122 Josh talk contribs (P4 verification: link the IBM manuals hosted on this wiki that document this machine (they were unlinked from every article)) | ||||
| 00:18 | File:IBM PCjr Technical Reference.pdf diffhist +1,069 Josh talk contribs (P4 verification: real File: description - document identity from its own title page, page count, honest source note and honest licence block) | ||||
| 00:16 | IBM PCjr BASIC Reference (June 1983) diffhist +1,426 Josh talk contribs (P4 verification: real documentation page - title as printed, part/form number, edition, contents, honest gaps, what it settles, cross-links) | ||||
| 00:16 | IBM PC 5150 Technical Reference diffhist +3,252 Josh talk contribs (P4 verification: real documentation page - title as printed, part/form number, edition, contents, honest gaps, what it settles, cross-links) | ||||
23 September 2026
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03:40 | IBM Cassette BASIC 2 changes history +5,076 [Josh (2×)] | |||
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03:40 (cur | prev) +206 Josh talk contribs (Add illustration of the Cassette BASIC start-up screen) | ||||
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03:23 (cur | prev) +4,870 Josh talk contribs (Corrected the claim that Cassette BASIC was dropped from the PCjr - IBM's own PCjr Technical Reference says it is in system ROM, with Cartridge BASIC adding Advanced BASIC; added the 5170's U27/U47 location and C1.00/C1.10 versions; replaced the vague 'reseat and swap' fault note with the per-BIOS-revision symptom table including the Fx00 ROM messages; added ROM pinout/substitution notes; removed the unverifiable PS/2 claim and said so plainly; <ref>-cited) | ||||
| 03:29 | IBM PCjr Maintenance Guide diffhist +4,591 Josh talk contribs (Corrected the power supply description against IBM's PCjr Technical Reference: the external brick is a 17 Vac transformer only and does NOT supply regulated DC, has no rectifier or regulator and no electrolytics to replace - the ageing electrolytics and all the protection are on the internal Power Board. Added IBM's rail table, tolerances, trip points, the 1.5 A minimum +5 V load for -6 V and the five-second over-current reset. Added the keyboard cord's battery-disconnect and IR-disable behav...) | ||||
| 03:28 | IBM PCjr diffhist +3,465 Josh talk contribs (Rebuilt against IBM's own PCjr Technical Reference (hosted here). Power section was wrong: the external brick is a 17 Vac transformer only - no rectifier, regulator or bulk capacitor - and all rectification, regulation and protection are on the internal Power Board; added IBM's +5/+12/-6 V rails, load currents, tolerances, trip points and the 1.5 A minimum +5 V load needed for -6 V. Video corrected: the subsystem is a 6845 plus IBM's Video Gate Array LSI5220 with a 16-entry palette, and the d...) | ||||
22 September 2026
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00:45 | IBM PCjr Capacitor Replacement Guide 2 changes history +10,750 [Josh (2×)] | |||
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00:45 (cur | prev) +262 Josh talk contribs (Add the PCjr internal teardown photograph alongside the power supply description) | ||||
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00:36 (cur | prev) +10,488 Josh talk contribs (Verify against the IBM PCjr Technical Reference (hosted on this wiki), Brutman and Console5; add inline <ref> citations. Major correction: the external PCjr brick is a TRANSFORMER supplying 17 Vac - it contains no rectifier, no switching regulator, no secondary electrolytics and no high-voltage bulk capacitor. Rectification and regulation happen on the Power Board inside the system unit, which is where the electrolytics and the over-current protection are. Removed the fabricated fold-back/DC-...) | ||||