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Vintage Computers Any vintage computer systems, calculators, video games etc., but with an emphasis on 1980s and earlier equipment.

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Old 6th Mar 2021, 8:56 pm   #821
ajgriff
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Default Re: Non-working Commodore PET 3016

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
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File Type: pdf C2N 1530 1531 Service Manual.pdf (1.66 MB, 2 views)
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Old 6th Mar 2021, 9:22 pm   #822
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Default Re: Non-working Commodore PET 3016

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
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Old 6th Mar 2021, 10:19 pm   #823
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Default Re: Non-working Commodore PET 3016

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
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Old 6th Mar 2021, 10:27 pm   #824
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Default Re: Non-working Commodore PET 3016

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...
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Old 6th Mar 2021, 10:46 pm   #825
SiriusHardware
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Default Re: Non-working Commodore PET 3016

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.
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Old 6th Mar 2021, 11:16 pm   #826
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Default Re: Non-working Commodore PET 3016

Quote:
Originally Posted by SiriusHardware View Post
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...
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Old Yesterday, 8:13 pm   #827
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Default Re: Non-working Commodore PET 3016

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.
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Old Yesterday, 8:15 pm   #828
duncanlowe
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Default Re: Non-working Commodore PET 3016

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.
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Old Yesterday, 9:20 pm   #829
SiriusHardware
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Default Re: Non-working Commodore PET 3016

Quote:
I'll start with H6 and remove that/solder in the new socket; is that the right place to start?
Certainly is.
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Old Yesterday, 9:43 pm   #830
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Default Re: Non-working Commodore PET 3016

Done.

Colin.


Quote:
Originally Posted by SiriusHardware View Post
Quote:
I'll start with H6 and remove that/solder in the new socket; is that the right place to start?
Certainly is.
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