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Old 27th Sep 2022, 8:23 pm   #136
ScottishColin
Octode
 
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,762
Default Re: 1978 Commodore PET project

I have a dual disk drive 4040 that worked first time (well, after someone here helped me fix the power supply). I was somewhat surprised.

If you ever find those service manuals/literature, I'd love to see a copy (or even buy them off you if you're wanting to move them on).

Colin.

Quote:
Originally Posted by FrankB View Post
Back in the mid 80's I was a CBM authorized svc tech. for a CBM ASC.

I quickly learned to use only machine pin sockets, as they were mechanically & electrically better than the cheaper ones. (I hated callbacks).

If you really need a schematic, Howard W. Sams covered the 2 (USA) models of the CBM computers, and there is a slight possibility I may have OEM svc literature for the U.S. models still...maybe... That was 40+ years back.

Mostly they wanted us a board changers.

The highest failure item I ran across was the floppy drives failing.
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