Commodore 64 repair logs for the C64 motherboards

Commodore 64

This sub-section holds the repair jobs I have done on Commodore 64 (Breadbox) motherboards:

Assy 250407 Rev. B #1 – black and white squares (VIC-II, PLA, RAM)
Assy 250407 Rev. B #2 – black screen (PLA)
Assy 250407 Rev. B #3 – normal characters in multicolored ‘rainbow’ (PLA)
Assy 250407 Rev. B #4 – no Serial Port access (7406)
Assy 250407 Rev. C #1 – startup screen with scrambled characters (CHAR ROM, PLA)
Assy 250425 Rev. A #1 – black screen (power switch, CIA)
Assy 250425 Rev. A #2 – black screen (PLA, CHAR ROM)
Assy 250425 Rev. A #3 – black screen (RAM, 556, 7406, transistor, fuse, diode)
Assy 250425 Rev. A #4 – no Serial Port access (7406, diode)
Assy 250425 Rev. B #1 – Control Port 2 faults (CIA)

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