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Old 06-19-2008, 01:31 AM
Eric H's Avatar
Eric H Eric H is offline
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Join Date: Jun 2002
Location: So. Calif
Posts: 11,565
Sick TV

OK, this may actually have a bad Flyback, or something else is shorted.

I pulled it apart this morning and found a 2200m@16V that was bulging at the top, that gray cap is the replacement, I also replaced a 3.3@50V right next to it, this made no difference in the operation.

The unloaded voltage from the 13.5v wall wart is around 18v, a bit high but the set should run on it. The radio is fine as is the tape player, when the switch is thrown in the TV position is when the trouble starts.

I'm getting a low hum from the speaker, the big transistor next to the Fly is getting pretty warm but it doesn't check shorted, the fuse is OK, the Fly also has a slightly warm feel on the side after letting it run for a bit, I'm not sure if the fly is bad or if the horiz oscillator just isn't running. None of the pins on the fly has more than 5 volts on it.

Would pulling the fly and seeing if the load goes away be a useful test?
I could even swap the fly from one of the other sets if I had to, they are all pretty much the same chassis with minor variations.
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