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I was repairing TV's for friends before they were vintage. I've only been a member for a short while and I have just started to repair my first set that is now old enough to be considered vintage.
Every electrolytic that I've removed so far has, except for one bad one, tested better than the replacements I bought in terms of capacitance and ESR. The leakage is just a bit higher than the new ones. Every paper capacitor has a leakage of 300ua or more and keeps climbing. I consider that bad.
I may leave some of the electrolytics in. I have some equipment with electrolytics that are older than 60 years and still work well. I'll get yelled at for that, but I will make sure they aren't in a position to damage irreplaceable parts.
I will replace every paper capacitor first. I read a Japanese paper on the failure modes of paper capacitors and even if 300 ua is acceptable it seems that the current is creating some rather nasty byproducts that will eventually destroy the caps.
I've found a bad resistor, it doesn't surprise me since the lead had shorted against the chassis. I won't check the others until I power it up unless they look bad or had a bad cap attached.
I expect to learn from this project. Maybe the hard way.
John
Last edited by jeyurkon; 03-12-2009 at 01:54 PM.
Reason: forgot an exception
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