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Old 07-02-2015, 12:43 PM
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Jeffhs Jeffhs is offline
<----Zenith C845
 
Join Date: Feb 2003
Location: Fairport Harbor, Ohio (near Lake Erie)
Posts: 4,035
Quote:
Originally Posted by ZackN920 View Post
Hey y'all, where could I find a schematic for this set? It has the "Super H20 Chassis" in it. I dont know at the moment if there's a more specific chassis identification code or not, just let me know if there is and I'll see about pulling the tv out of the corner to have a look.
General gist is that the set seems to be developing issues, and I'd like to turn it into a daily driver. I also got to get it apart sometime to give the flyback some attention. Last time I took a peak at it, it looked like all the black coating fell off and was laying in a pile of chipped off pieces. (Mabey the reason it sounds like a burning cigarette with the back off)
I've got more I could add but I'm out of time
Sounds to me as if the CRT is shot. The black coating flaking off the bell of the tube (the aquadag) acts as a huge capacitor in the high voltage system. Without it, the CRT cannot get 2nd anode voltage, which will of course kill the raster.

I'm not sure where the sound you're hearing is coming from, but it seems to me that the missing aquadag on the bell of the CRT may have a lot to do with it. In any event, the tube is now little more than a glass jug and must be replaced.
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Collecting, restoring and enjoying vintage Zenith radios since 2002

Zenith. Gone, but not forgotten.
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