Question about RCA R52WM24 52" HDTV Projection Television

6 Answers

First a convergense problem and after a new board was installed it works for

15-20 minutes and then screen goes black and light in off and one switch flickers and power goes on and off but not long enough for a picture. Some background bowed colored lines are occasionally visible as set goes on and off? I have invested $320 with a recognized RCA repairman who is now stumped. Can you help?

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  • MarilynM Sep 09, 2008

    I'm sorry but I have a perfect picture during the 15-20 minutes that the TV operates and I think that there must be an electrical overheat somewhere. I think the bad picture tube is poor advice since I have a good picture after the convergence board was installed. TV goes off and then off and on with black background and faint bowed rainbow accross top of the picture.

  • MarilynM Sep 09, 2008

    Since I have two different opinions from two of your experts could I have a couple of other expert opinion before I consider spending a few thousand dollars on a new set after only 18 months with this one!

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6 Answers

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Has your repairman checked the high voltage power supply?

Posted on Feb 11, 2009

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Buy yourself a can of compressed air. when the tv quits start spraying quick blasts of air on components ... when it comes back on you have found the defect.

Robert

Posted on Sep 09, 2008

  • Roberta Smith
    Roberta Smith Sep 10, 2008

    the idea in that is you have an intermittent problem... the last time i ran into that it was a capacitor. i have no disparaging remarks for the repairman as intermittent failure is a pain to diagnose. if it is heat the blast of air will cool the component and the picture will come back on.



    Robert

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Since you said that a part of the board was replaced.. u have a part of the solution in your hands like u said few places are getting over heated.. so its better to replace the filter components and resistors surrounding it... It may help...

Ismail

Posted on Sep 09, 2008

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FIrst of all, in order to provide you with the best advise, I'll need a little more background info. I assume that the original problem was a convergence problem and that the convergence ICs were replaced. Am I correct? If so, please post the IC part number (STKxxx). Along with those ICs, there should have been a check of a number of low valued resistors in the same circuit as well as any pico fuses in the area. If the resistors have either opened up completely or significantly changed value, the circuit will not function correctly and the protection circuits may kick in shutting down the set.

Update this and we'll go on to the next steps.

Dan

Posted on Sep 08, 2008

  • ABRsvcs Sep 09, 2008

    Since you have replaced the entire convergence board, the low valued resistors should also be new. I would be looking in the 24V power supply area for a bad filter capacitor. If the cap starts to fail, the 24V may drop mimicing poor convergence. Check also for poor solder connections in that area.



    Dan

  • ABRsvcs Sep 09, 2008

    Have you checked the supplies as I suggested? Please update this.



    Thanks,

    Dan

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Thew problem is in picture tube...better u change ur picture tube and check...it may cost oly 500 to 1000..and also check ur televisio0n mother board whether the current passing thro it are proper or not

Posted on Sep 08, 2008

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This is a common issue, and it is almost always a high voltage circuit board problem, why? the greatest enemy of electronics is heat, so the parts that do the most work fail first. I have found that the repair cost so high that a new TV is the way to go, so you fix the first problem then a year later something else, just bite the bullet and buy a new LCD TV, they are cheap and very reliable.

Posted on Sep 09, 2008

  • yadayada
    yadayada Sep 10, 2008

    Fix it yourself

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