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I had restored one of these Avanti sets with a 25DC56 chassis. It had several issues, when I got one fixed, another was found.
The new owner was not a tech, so I had to make sure all the bugs were out.
The 24 volt supply was dead from a burned up 2.2 ohm resistor, so I had HV but no vertical sweep or sound.
It turned out to be a shorted .1 mf 50 volt cap, tubular dark red, that burned up that resistor. You just never know what part is bad until you disconnect everything fed from that source.
Often, 24v feeds thru almost every module, so that if one is removed, the circuit is broken and none get 24v. Generally, small capacitance value electrolytics at low voltages - 10, 50 or 100 volts do not hold up well. I tested EVERY electrolytic capacitor for ESR and found only a few really bad, but I changed all except the large multi section cans, which were good.
Very glad you found those 22-5001 caps! Stay tuned and keep trying, there is lots of Zenith CC experience here.
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"When resistors increase in value, they're worthless"
-Dave G
Last edited by DavGoodlin; 04-05-2022 at 04:28 PM.
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