I have found the mini engravers you can get at Harbor Freight for under 10 bucks work very well on those corroded boards. It removes the corroded copper but is gentle enough to leave the good stuff you can still solder to. I do a lot of work on more "modern" electronics like 80s/90s computers and VCRs which have a lot of electrolytic capacitor leakage problems and it has become an invaluable tool in my arsenal
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When you lower your standards, you set a new standard!
ISO: Mitsubishi 6CT-338, Sony Chromatron 19C70/100, Yaou "Colornetron" GTC-9, etc...
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