Yes, strip off the coating and then re-solder each contact point. It takes about an hour or so to do.

I used this varnish remover, it worked out pretty well. After it was done I took the board to the garage and used the air compressor to blow of the remains.





I'm not aware of any one particular area, I always re-solder the entire board.

I have a schematic for one of the older board from the early 80s. Nothing for the newer ones.

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