Question about Hitachi 50UX57B 50" Rear Projection Television

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2 inches of picture from top is brighter and picture in tthat area is distorted

I have an intermittent problem that presents itself most of the time. The part of the screen that covers 2-3 inches from top is brighter. The picture in that area is distorted specially close to the junction of the normal portion and the lighter portion. The rest of the screen is okay.

Is this expensive to fix?

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Hmmm, could be anything from dirty optics, to a convergence problem....accordianman

Posted on Feb 18, 2008


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This is a problem (one of several) caused by poor solder connections on the circuit board. RCA uses the metal shield can surrounding the tuner circuitry (the area where the cable connector is located) to provide several ground connections. Many of these connections go bad (cracks form) and the missing ground connections cause the "picture shrinking" you see. Other problems are loss of tuning, set that intermittently turns off or on by itself, set that won't turn on at all, and even more.

The repair involves removing the circuit board and flipping it over so you can remove a metal cover on the bottom, repairing the several (many) affected connections, and then reassembling. This is a relatively easy repair for someone with soldering experience and the right tools (both a high-heat soldering gun and a low-heat iron are needed). But because of the fragile circuit traces in the repair area it is possible to do more harm than good if you don't know what you're doing.

RCA produced a service bulletin several years back detailing the areas to be repaired (although they still refused to admit they just hadn't soldered the places adequately to begin with). I'm not home now so I can't check my files but I'll see if I can find a link and add a comment later. When I was in the service business we charged around $60 for the repair. You might want to get an estimate from a shop (they should already be familiar with this trouble). Or if you're looking for a reason to buy a new set, try the repair yourself. If you're successful you've saved yourself the money. If not, it wasn't working anyway!

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try hitting the side of your set to see if you can get it to jump out of place. If your can get if to fail by doing this your convergence amps have bad solder joints.

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If you have a TV shop at all any more in your area, any tech working on them will know where to look. This is a pretty common problem although you are getting it too early.
Since it will require a certain type of instrument (capacitance meter) to verify the problem part, I don't want to go into detail concerning a 'do-it-yourself' repair since it may be a little difficult to order these in single quantities and a decent shop should have the right value on hand.

It shouldn't cost too much.

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There are some components it the vertical deflection amplifier area that are becoming thermo sensitive with age. It is also possible that there will be parts going off value in the power supply and other areas.

These problems are typical in these sets when they are aged. The cost of the repair may not be worth the investment.

You should take the set in to a service center for an estimate.

Jerry G.

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Samsung 42" rear projection tv. Picture is slightly distorted at top left hand corner. All three bulbs seem okay and the mirror also seems fine. It's as if there is an issue before the bulbs. Any...

What's the model number? Describe the distortion in some detail. Is it intermittent? Does it seem to affect anything else, like audio, when it's present?

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hi there, you have vertical section prob., repalce imeditely the electrolytic capacitor at the vertical section. do some test and check up. ty

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