I was wathing TV when the picture got black trim on both sides and the picture seemed too big for the screen. The words were cut off by this black line. Then as I continued wathing the picture all of the sudden shrunk to about a 12 inch square and had concave side to it. While I played with the remote the television turned off and would not turn back on. I later unplugged it from the DVR box and back into the wall outlet, at which time the TV turned on with the picture still shrunk and distorted. I would like to know if there is a simple solution, I am a handy electrition with some electronics experience, or will it require serious repair.
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Re: av-32f476 picture shrinkage
I had a Crummy Westinghouse TV that had a problem like this. JVC's are typically better built then a Westinghouse. My first educated guess - sounds like it's a voltage issue, most likely on the high voltage. Probably a capacitor on the power supply side of the motherboard or the capacitor in the flyback transformer. Just and educated guess.
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If the shrinkage is just the top & bottom then it is relatively easy/low cost fix. Most probably, a capacitor in the vertical section is nearing end of its life. This would be the biggest of the bunch and would be something like 47uF/50V.
If however, the shrinkage is on all four sides, then it is the master power supply that is at fault. Chances are the main B+ is getting low which cold be caused by the big filter capacitor or an erratic regulator. This is not a simple fix and would require the services of a qualified professional.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
civilman, the first set has either no high voltage or is collapsed vertically, until someone checks for high voltage there is no concrete answer, the AV27730 is vertical collapse from your description, either the voltage to the vertical IC is missing or the vertical IC has failed, not a big deal cost-wise, hope this answers your questions, if not e-mail me back, good luck, BMW Rider