Quote:
Originally Posted by vortalexfan
But no one answered my question about the electrolytic caps in the big Zenith TV, I had asked if it was ok to just replace the bad sections of the multi-section caps and continue to use the good sections of the multisection caps, or if I should just replace all of the electrolytics and be done with it?
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If you find the caps are full-on open with very high ESR, I'm not sure they would reform. It the old days, I usually just bridged a new one across it to see if issue would go away.
More importantly, if the cannot charge up to rated voltage using a high-impedance cap tester with an eye tube, just disconnect those sections and replace one cap as needed.
Often just the half-circle (usually the highest value) cap section is suspect as it gets the full DC supply initially before the tubes warm up and begin to draw current.
I usually find one out of four open, showing very high ESR, almost always on the lower values like 2, 5, 10, 20mf etc. Even if ESR is low, you may still find that cap becomes leaky at rated voltage. It probably went bad long ago but a good set like this Zenith might not show symptoms.