Posted By
au-chadl
on 2017-12-16
20:05:03
|  Commodore plus 4 assy no 250455
Does anybody have a schematic diagram for the Commodore Plus 4 assy no 250455.
There are a few minor differences between 250455 and 310163.
Does anybody know what is CR21, CR22, CR23 and CR24 on the 250455 are. These are 4 diodes.
The CR21 and CR22 diodes, do not have any markings, except for a yellow band.
CR23 and CR24 diodes, do not have any markings, except for 2 purple? coloured bands.
The CR21 and CR22 diodes are located behind CN2 (serial port)
The CR23 and CR24 diodes are located near sw2 (reset switch)
CR22 looks like it is connected to the serial port.
CR21, CR22, CR23 and CR24 are not used in assy no. 310163
The Plus 4 service manual only has the parts list and schematic diagram for the 310163
Thanks for you help.
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