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Old 1st Jan 2021, 6:49 pm   #2
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,485
Default Re: Non-working Commodore PET 3016

Hi Colin,

There was coincidentally a more recent thread concerning the same model.

https://vintage-radio.net/forum/showthread.php?t=163589

Although your problem sounds different (dead?) have a read through that thread as the OP in that case was also at what he considered entry-level when it came to circuit diagrams, but he made great leaps as the thread progressed so maybe it will give you similar encouragement. There are also links to circuit diagrams, etc, in that thread which you will probably need to get to grips with to tackle this.

If you can solder and use a meter, that's you off to a running start. When you say you have power, are you judging that from the presence of a CRT neck glow or have you verified that all of the supply rails are present and at the correct voltage?

If you don't have a scope - which you really do need to consider obtaining for this sort of work - do you have a frequency meter or can your multimeter measure Hz / frequency?
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