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Old 07-06-2011, 08:21 PM
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radiotvnut radiotvnut is offline
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Join Date: Jul 2007
Location: Meridian, MS
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I pulled this set out and I'm a little stumped at the moment. The 115 volt B+ was about 15 volts low and I discovered that the B+ adjust pot had been turned down. After resetting the B+, the vertical problem was still there. All electrolytic caps and B+ voltages to the vertical circuit check OK. The only voltage that checks wrong is the voltage at pin 1 of the vertical osc/driver IC (NTE794). It is supposed to be 1.25 volts; but, checks around 3.8 volts. I replaced one cap that I suspected could be leaky and causing the higher voltage and checked the resistors having to do with that part of the circuit; but, everything checks OK. I'm wondering if the IC itself could be at fault. Of course, an NTE794 is NLA; so, I'd have to find a NOS one somewhere.

I really don't want to spend a lot of time or money on this set, since the CRT is a little soft. If I can get it going without putting much more time in it, I may keep it for a spare TV. Otherwise, it's going to the dump.
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