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Another update.. I'm kind of embarrassed to admit it, but over the years I have managed to acquire 7 of these JVC HR-D470U VCRs. The one I bought new in 1987 and one several years ago that worked when I bought it but stopped working, I have bought 5 others cheap as-is / parts only. 1 of the as-is works perfectly fine. Anyway at this point, I have every one of these working now. 4 (!) of them have failed because of a 3300MF capacitor in the power supply! It is next to a heat sink and I guess gets cooked over the years. This causes nasty ripple on the 5V power supply and causes lots of problems. Tonight I replaced a badly slipping belt on the last one ans its running now.
3 of these still have one problem remaining. The tracking control does nothing. I don't think they are dirty pots either because I worked one of them back and forth probably 100 times. That should have got it doing something. Hopefully it won't be years until I get that figured out.
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