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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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10th Sep 2022, 4:34 pm | #1 |
Octode
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,803
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Aesthetically pleasing repair
As some of you may recall, one of the failures I had on my PET was the loss of Ground connectivity on UD9 pin 12. I've got past this by pushing a wire in pin 12 of UD 6 and UD9 - see attached photo.
I'm pretty sure that even though this works, it isn't the 'right' way and was wondering what you would do in this situation?
All opinions gratefully received. Colin. |
10th Sep 2022, 5:34 pm | #2 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 13,996
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Re: Aesthetically pleasing repair
I would want to do it properly, with an appropriate link on the underside of the PCB.
"Verowire" - available from RS, is insulated wire that is very thin, traditionally dispensed frtom a "wiring pen" that includes a spool. The wire is 'self-fluxing' - no need to strip, the heat of the soldering-iron melts through the insulation. This is great for making quick-and-dirty but long-term-reliable amendments to PCBs; there is even a special quick-set glue and 'combs' avasilable to keep the newly-added wire-links neatly in place. https://www.instructables.com/PCB-Pr...With-Verowire/
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I'm the Operator of my Pocket Calculator. -Kraftwerk. |
10th Sep 2022, 6:25 pm | #3 |
Octode
Join Date: Mar 2020
Location: Kitchener, Ontario, Canada
Posts: 1,294
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Re: Aesthetically pleasing repair
It looks like the 0v connection to pin 12 is on the top side of the pcb. As you used a turned pin socket you might be able to remove a bit of solder resist from the 0v track and solder pin 12 of the socket directly to the 0v track.
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10th Sep 2022, 7:01 pm | #4 |
Octode
Join Date: Mar 2011
Location: North Yorkshire, UK.
Posts: 1,115
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Re: Aesthetically pleasing repair
Whichever way you choose, write it down on a slip of paper that lives permanently under the PCB!
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11th Sep 2022, 8:10 am | #5 | |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,553
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Re: Aesthetically pleasing repair
Quote:
If it was me, I would have to know where the problem really was and I would start by using a hot wire or hot scalpel blade to slice the frame of the turned-pin socket up into little bits so that each socket pin stood alone and could be individually desoldered and removed, leaving only the pads to be cleared, examined and repaired as necessary. Then, I would fit a new conventional socket because whatever their drawbacks compared to turned pin sockets, they are much easier to remove and replace. |
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