This guy is restoring VINTAGE audio gear. It is definitely younger than the Boatanchors we usually work on, but it is a lot older than more recent gear that is made with largely pick-and-place machines and surface mount components. There are mostly through hole components here.
There are some challenges I've never thought about: glue that over time starts to mess up the circuitry. Fusible resistors? Who knew? And then there are relay contacts that go really bad. We use a lot of these kinds of relays.
All in all, there are a lot of good ideas in this video. His other videos are probably worth watching too. I think it will be especially useful for my friend Bob, KD4EBM who does a lot of work in this area.
Please let me know what you think. Comment below.
In the mid 90's I was repairing a 2 part VCR system (one with a main VCR tape transport section and a wired remote camera - the predecessor to the portable camcorder) where the main VCR part's tape control buttons (Play, Record, FF, Rewind) would work fine, but the remote camera's controls were intermittent some times and wouldn't work at all other times. The remote control functionality between the two units was implemented using a pair of custom ASIC integrated circuit chips. Troubleshooting suggested that the problem was most likely in these two chips, which I replaced at considerable expense ($190), but the trouble remained after replacing these chips. At that point I was at a loss as to what the problem could be so I began to really dig deep into the circuit and eventually discovered that problem to be a rubber pad between the circuit board and the metal chassis. This pad was glued on the PCB and covered several traces of which were corroded and the glue created a conductive path between the traces causing a short between the traces. I removed the glue and problem solved. Lesson learned the hard (expensive) way. 73 - Rick - N3FJZ
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