Commodore 64 General Maintenance: Revision history

1 October 2026

• curprev 09:5209:52, 1 October 2026 Josh talk contribs 12,067 bytes +19 Tolerance note: cite diagnostic manual 10 % undo
• curprev 09:5109:51, 1 October 2026 Josh talk contribs 12,048 bytes +485 Add Commodore diagnostic manual supply figures (9-12 V AC at CN7, VIC-II supply pins, reset timing) undo
• curprev 09:4509:45, 1 October 2026 Josh talk contribs 11,563 bytes −2,483 Re-cite to service manual pages; replace invented tolerances (4.9-5.1 V, 9-11 V AC) with C64-Wiki and 78xx datasheet figures; drop invented symptom column, annual reseat interval, heatsink and Retrobrite advice; fix C90 role; remove self-reference and bold undo

22 September 2026

• curprev 18:3418:34, 22 September 2026 Josh talk contribs 14,046 bytes +36 Correct the VIC-II row to what Commodore's parts lists actually print; the 6569 designation is not in this manual undo
• curprev 18:3218:32, 22 September 2026 Josh talk contribs 14,010 bytes +7,426 Rebuild from the C64/C64C Service Manual: 6510 +5V is pin 6 not pin 40, RESET is pin 40 not pin 3, phi2 is pin 39 not pin 2; SID audio out is pin 27 not pin 28; 9VAC is user-port pins 10-11 not 10-12; power DIN pin 1 is ground not +5V; capacitor values (1000uF/16V, 470uF/25V, two 220uF, 250469-05 SMD tantalums) were wrong and are removed in favour of the capacitor guide; 41464 is 256kbit not 128kbit; board table replaced with Commodore's own including B-2 250441-01; emoji heading removed; Unv... undo

21 September 2026

• curprev 21:5021:50, 21 September 2026 Josh talk contribs 6,584 bytes +20 Verification drive: flag unverified component data pending check against a primary source undo

12 May 2025

• curprev 08:3608:36, 12 May 2025 Josh talk contribs 6,564 bytes −90 No edit summary undo

24 April 2025

• curprev 10:0110:01, 24 April 2025 Josh talk contribs 6,654 bytes +10 →🔋 Power Supply: The “Death Brick” undo Tag: Visual edit

23 April 2025

• curprev 20:4220:42, 23 April 2025 Josh talk contribs 6,644 bytes +88 →🔋 Power Supply: The “Death Brick” undo Tag: Visual edit
• curprev 20:3720:37, 23 April 2025 Josh talk contribs 6,556 bytes +100 No edit summary undo Tag: Visual edit
• curprev 20:3520:35, 23 April 2025 Josh talk contribs 6,456 bytes +48 →💣 Capacitor Health undo Tag: Visual edit
• curprev 20:3420:34, 23 April 2025 Josh talk contribs 6,408 bytes −26 No edit summary undo
• curprev 19:4519:45, 23 April 2025 Josh talk contribs 6,434 bytes −52 No edit summary undo
• curprev 19:4519:45, 23 April 2025 Josh talk contribs 6,486 bytes +6,486 Created page with "<templatestyles src="Template:StyledTable/styles.css" /> = 🛠️ Commodore 64 General Maintenance Guide = The legendary '''Commodore 64''' (C-64, C64 C, “bread bin”, 64C, Aldi C64, SX-64) is now 40-plus years old. Aging electrolytic capacitors, brittle plastics, and the infamous “death‐brick” PSU all put these machines at risk. This page collects '''best-practice hardware care''', preventive service, fault-pre-emption, and periodic checks for '''every boa..." Tag: Visual edit: Switched