These documents are for repair service information only. Part numbers are for reference only. Only parts on current dealer parts list are available. No license is given for any use by possession of these docu ments and may not be reproduced in any form without the written approval of Commodore Electronics Limited.

There are three versions of the C64. The C64 with a five pin connector video output (326106), The C64 with an eight pin connector video output (251138}, and the C64B which has improved system clock circuit design (251469).  Most circuit theory explanations will be the same for all three versions. Refer to schematic 326106 unless noted otherwise.

Commodore 128 & 128D Service Manual.

Commodore Service Manual for the 2031 Disk Drive - High and Low Profile Models (December 1985)

Commodore 64/64C Service Manual (March 1992) - PN-314001-03

Micro World MW701-A Power Supply Schematic - Had one of these aftermarket power supplies for my Commodore 64 back in the day.  They were sold by TENEX and were often advertised in Compute! and RUN magazine.