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I opened the Sears and I can tell that it has a lot of hours on it. Looking at the CRT, it has an EIA code of 274; which, is RCA. The snowy picture appears to be caused by a defect in the AGC circuit. On the AGC terminal of the tuner, I have 7.9 volts and this voltage remains the same regardless of input signal level or the position of the RF AGC control. The next thing I'll probably do is apply a variable DC voltage to the AGC terminal of the tuner to see if I can get a clear picture.
I opened the Magnavox for a quick look and it is the model that uses the failure prone 100 uf cap that's located behind the flyback. The HOT is shorted; but, I haven't looked further. The EIA number on the CRT is 312; which, is Sylvania (no surprise there).
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