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Question about RCA 35V432T 35" TV

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Colors are distorted, brightness excessive

I purchased a floor model RCA less than a year ago and the colors have deteriorated to the point where no adjustment makes the image right. The brightness consistently makes all the white in the image bleed and dominates the image, and the other colors are also warped (or just generally dark). I have been trying to understand the problem so any possible remedies and guidance would be appreciated. Schematics and\or a service manual would also be useful...even a website for understanding the way a TV works would be great! Thank you in advance for any and all help.

Posted by Sid Sanchez on

  • Sid Sanchez Feb 05, 2007

    THANK U STARGAZER...some basic questions...What is the "screen control" and how does it open up? How do I fix\replace it?

    As far as the fly back transformer, I think that could be the problem as the screen (brightness) control used to make the difference in the first couple of months and later no longer adjusted properly-although the focus still adjusts the image.



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Simpson Neal

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You may have a bad Fly Back transformer. The focus and screen(brightness) controls are located on this transformer. Some of the new RCA's have had problems with this transformer. If the screen control opens up the picture may either go dark or light which would cause your problem. Also a bad Picture tube could cause this. It shouldn't since the tv is not very old though. I've seen a few new ones go bad. Stargazer

Posted on Feb 04, 2007

  • Simpson Neal Feb 17, 2007

    Hello, again
    The screen control is located on the flyback transformer. It is an integral part of the flyback. You'd need to replace the whole flyback assembly.
    The screen control will open up if the wiper contact starts arcing or if moisture seeps inside. The wiper just slides along a film of resistive material (usually carbon) and since there is a pretty high voltage involved, it can start arcing and burn out.
    Also on the picture tube drive board there is a small high voltage disc capacitor which may become leaky or shorted which in turn will burn out this control.
    Both the focus and screen controls are made together forming an adjustable voltage divider.
    Depending on which part opens up determines which circuit is affected.
    I hope this helps explain its operation and location.



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