Quote:
Originally Posted by walterbeers
Also another thing that i have seen happen is that the HV cup itself develops a crack or a spot in which the HV will arc through to the chassis. In this case you just need to replace the HV cup.
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If it is a single point leak you can often fix the cup by, cleaning the snot out of the cup, drilling out the carbon path and filling the hole with RTV silicone (which has a higher dielectric strength than the plastic used in most cups
). It ain't what techs did back in the day, but with some cups NLA it is sometimes the best approach.
Also some sets (IIRC Zenith mostly) used resistance wire for the HV rect heater winding which must be accounted for when replacing.