29th Apr 2021, 11:24 am | #1801 |
Octode
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,822
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Re: Non-working Commodore PET 3016
Here's a .PNG of the labels in case anyone ever wants them.
https://drive.google.com/file/d/1OpO...ew?usp=sharing Colin. |
29th Apr 2021, 11:29 am | #1802 | |
Octode
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,822
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Re: Non-working Commodore PET 3016
Thank you. As a bit of a first-timer in all of this (and with plenty of time on my hands), I've tried to keep as much as I can.
I did count and have replaced 17 chips and added 18 sockets though. The large front label is showing signs of wear and tear, paint splashes from somewhere and a bit of rust dribbling down it, but my plan is to mask it up and leave that on there if I can. As my wife said yesterday, this has been a good lock-down project for me. Colin. Quote:
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29th Apr 2021, 11:46 am | #1803 |
Nonode
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 2,587
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Re: Non-working Commodore PET 3016
Securely refixing labels that have been removed by peeling can sometimes (not always) be tricky especially at the corners as the the original glue can lose its stickiness. If this proves to be a problem its worth using double sided carpet tape suitably trimmed with a sharp craft knife and metal rule.
I'm very much looking forward to seeing photos of the finished machine. Alan |
29th Apr 2021, 5:33 pm | #1804 | |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,587
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Re: Non-working Commodore PET 3016
Quote:
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29th Apr 2021, 5:57 pm | #1805 |
Octode
Join Date: Apr 2018
Location: Newbury, Berkshire, UK.
Posts: 1,287
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Re: Non-working Commodore PET 3016
I'm astonished with the number of ICs that have needed replacing. I'm inclined to believe somehow the +5v got overvoltaged and took them out. It's not hard to do, only takes a stray screw or bit of wire in the power supply area....
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29th Apr 2021, 8:57 pm | #1806 | ||
Octode
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,822
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Re: Non-working Commodore PET 3016
Wait. You mean all projects aren't like this?
Colin. Quote:
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29th Apr 2021, 9:24 pm | #1807 | |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,587
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Re: Non-working Commodore PET 3016
Well... No.
Quote:
In most cases you would be looking at one or two devices failed and maybe a bit of cosmetic damage to repair - I doubt that you will ever tackle another one as difficult as this. |
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29th Apr 2021, 10:15 pm | #1808 | ||
Octode
Join Date: Mar 2019
Location: Barry, Vale of Glamorgan, Wales, UK.
Posts: 1,364
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Re: Non-working Commodore PET 3016
Quote:
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3rd May 2021, 5:12 pm | #1809 |
Octode
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,822
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Re: Non-working Commodore PET 3016
OK - all back together and worked first time. I have yet to put the silver stickers back on but I will soon and I'll post some pictures.
Here's some before and after photos of the inside and outside. I can still see the postcode and the KCFE (Kendall College of Further Education) 'engravings' and I'm fine with that. I wasn't after a perfect restoration back to how it came out of the factory - I just wanted to show it a bit of love. I'll post a couple more times on this thread with the summary and then I think we're done. Colin. |
3rd May 2021, 5:23 pm | #1810 |
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,554
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Re: Non-working Commodore PET 3016
Don't say you are done.
It will most likely bight back with another fault if you do that. |
3rd May 2021, 5:31 pm | #1811 |
Nonode
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 2,587
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Re: Non-working Commodore PET 3016
A very pleasing outcome. The off-white looks about right too. Well done indeed!
Alan |
3rd May 2021, 5:42 pm | #1812 |
Octode
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,822
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Re: Non-working Commodore PET 3016
Thanks - it's so much brighter than the colour I got it, but I think it's pretty much what I remember.
fyi I used Halfords Gloss Black for the base and Halfords Peugeot Bianca White for the case. I managed to keep the QC stams as well inside the case (not that anyone will ever see them) by judicious use of masking tape. Colin. |
3rd May 2021, 5:43 pm | #1813 |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,587
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Re: Non-working Commodore PET 3016
Wow, superb improvement, you have really done the machine proud. It must have been the luckiest day of that machine's life when it found you, Colin.
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3rd May 2021, 5:53 pm | #1814 |
Octode
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,822
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Re: Non-working Commodore PET 3016
I have just noticed I have mounted the transformer 180 degrees the wrong way round....
Colin. |
3rd May 2021, 7:24 pm | #1815 |
Octode
Join Date: Mar 2019
Location: Barry, Vale of Glamorgan, Wales, UK.
Posts: 1,364
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Re: Non-working Commodore PET 3016
Amazing restoration job - I just have to say I have learnt a lot so thanks for sharing the journey with us.
Now though I will have to work harder on the project I am working on... I must start a thread as I had a breakthrough today! |
3rd May 2021, 10:37 pm | #1816 |
Heptode
Join Date: Oct 2011
Location: Culcheth, Cheshire, UK.
Posts: 654
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Re: Non-working Commodore PET 3016
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3rd May 2021, 10:41 pm | #1817 |
Octode
Join Date: Mar 2019
Location: Barry, Vale of Glamorgan, Wales, UK.
Posts: 1,364
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Re: Non-working Commodore PET 3016
I just noticed that and was going to tag these threads to him - Jim is in the Triton user group on there as well - he is Happy Little Diodes - I am still awaiting his next episode on that machine...
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4th May 2021, 1:33 pm | #1818 |
Octode
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,822
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Re: Non-working Commodore PET 3016
Here's my next problem then.....since I have cleaned up the CRT and its board and put it all back together, while the PET stills works fine, the monitor has acquired a little irritating 'bounce' when powered on.
Has anyone come across this and fixed it? Thanks. Colin. |
4th May 2021, 2:21 pm | #1819 |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,587
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Re: Non-working Commodore PET 3016
Look carefully: Is the picture height expanding and contracting slightly, or is the whole picture staying the same height but shifting upwards and downwards by just one or two video lines?
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4th May 2021, 2:47 pm | #1820 |
Octode
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,822
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Re: Non-working Commodore PET 3016
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