Non-working Commodore PET 3016

[ajgriff]

First step is to identify which models they are and in particular which PCB assemblies are fitted. The attached service manual should help. I've got some other documentation which may be useful if you end up fault finding again. With any luck at least one of them might just work as it is. Worth scanning through the last few pages of the other PET thread.

Alan

[ajgriff]

You can actually do some testing of a C2N without a working PET (or VIC20/C64) providing you can provide it with 5V power. This would enable the drive train to be tested. Basic read functionality can also be verified using a scope and a suitable tape recording. I can provide more detail if needed.

Alan

[ajgriff]

I forgot to mention that the most common problem with an old C2N is a perished drive belt but they can be found on the internet for a couple of pounds or so and are easy to fit.

In the absence of a signal generator I guess you could test rudimentary write functionality using the headphone output of a smart phone playing tones from a media player. Not something I've tried though.

Alan

[Timbucus]

I hesitate to pick up on the mention of CESIL...

https://twitter.com/DarkBlueMonkey/s...21060496429057

this thread is thrashing around like a fire hose with nobody holding it - idle hands and all that! Let's hope Cricklewood do not take too long...

...anyone remember Magenta? my diary for last week from 1981 said I had just had a delivery of £10 of parts from them to build a fuzz box for a mate which I was punting out for £15...

[SiriusHardware]

Yes, please, let's try to keep this one on the subject of the repairs to Colin's PET, it has already had to be tidied up once. I am sure there is enough interest in Commodore tape machines just now to support a new thread on that subject.

[Timbucus]

Originally Posted by SiriusHardware

Yes, please, let's try to keep this one on the subject of the repairs to Colin's PET, it has already had to be tidied up once. I am sure there is enough interest in Commodore tape machines just now to support a new thread on that subject.

He mentioned CESIL first though...

[ScottishColin]

My fault.

back to the plot. I have spare sockets here now - I'll start with H6 and remove that/solder in the new socket; is that the right place to start?

Colin.

[duncanlowe]

I've been following the thread with interest. But Colin's post about the origin of his interest in PETs means I have something to share.

I too first came to computing and PETs while at school. We also only had a dumb terminal linked via acoustic coupler to Milton Keynes and no pupils were allowed near it, in fact most staff weren't.

But my Dad worked at Lanchester Polytechnic who bought some of the first models, and as they finished for summer before schools, he was allowed to loan one to the school for the last two weeks of term, for 2 or 3 years.

After they had been in the poly a couple of years, the 'A' key started to wear out on most of them. Again reminded of this by the OPs reference to space invaders, where 'A' was the fire button. There was another game, Star Wars, where one had to do the bomb run and destroy the death star.

Good luck with getting it running, Colin. It's as much part of my history as it is yours.

[SiriusHardware]

I'll start with H6 and remove that/solder in the new socket; is that the right place to start?

Certainly is.

[ScottishColin]

Done.

Colin.

Originally Posted by SiriusHardware

Certainly is.