C64 Schematics
The following schematics were obtained somewhere else (usually as GIF or TIFF files) and converted to pdf by me.
* Commodore Service Manual PN1-314001-03, Page 17:
"The 4th version of 64 board (250441) was recently developed
and only a few may be in the field. It is termed the 64B-2.
All circuits remain the same as the 64B (Schematic 251469) with
a few component location changes:
1) Resistors 28, 29, 30, 36, 48 were reduced to Resistor Pack RP5.
2) Diodes CR100-105 are no longer piggybacked. Their new locations are CR9, 12-16."
Other C64 schematics:
Sources:
● SERVICE MANUAL C64/C64C, March, 1992, PN-314001-03
● Ray Carlsen's Website
● Bo Zimmermann's Website
* Commodore Service Manual PN1-314001-03, Page 17:
"The 4th version of 64 board (250441) was recently developed
and only a few may be in the field. It is termed the 64B-2.
All circuits remain the same as the 64B (Schematic 251469) with
a few component location changes:
1) Resistors 28, 29, 30, 36, 48 were reduced to Resistor Pack RP5.
2) Diodes CR100-105 are no longer piggybacked. Their new locations are CR9, 12-16."
Other C64 schematics:
Sources:
● SERVICE MANUAL C64/C64C, March, 1992, PN-314001-03
● Ray Carlsen's Website
● Bo Zimmermann's Website