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the large oval shaped cap is part of the power supply voltage regulation system. if its not hot its OK. Its an oil filled 3.5uf cap, generally used for motor start caps on large AC motors. If the circuit breaker is not kicking out its prob ok.
50% out is not a problem with most eletrolytic caps of that era, I doubt that is causing the issue.
Older zeniths with jail bars would point towards blanking diodes in the video circuit. I would have to look at the schematic to see how blanking is accomplished here.
Last edited by DaveWM; 07-27-2013 at 07:30 AM.
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