Thread: On the bench: Zenith color roundie 25MC30
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Old 01-09-2015, 08:50 PM
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Kamakiri Kamakiri is offline
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Quote:
Originally Posted by Electronic M View Post
It is possible the seleniums on the convergence board are bad usually after caps are changed and resistors checked those are next on my list of suspects.

You want to replace them with shottkey diodes. Silicon diodes like the 1n4007 likely will not switch fast enough at horizontal frequency.

EDIT: have you checked the color circuit tubes? On my zenith roundy the color did not work because the tubes were simply dead out of cathode emission.
Tubes are good, and there are no seleniums on the convergence board. What's next I can check?
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