Question about Philips 50P8341 50" Rear Projection Television

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Chirping Problem Did you ever figure out what was causing your TV to shut down and chirp?  I have a similar problem.

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  • Edward
    Edward Dec 06, 2008






    Chirping may be one of two things...

    Shorted convergence chips
    Faulty Flyback ( HVG ) 

  • Edward
    Edward Mar 22, 2009

    Most common reason is shorted convergence chips. Goto the site www.TvRepairKits.com and get their "chirping set" repair kit.

  • Anonymous May 02, 2009

    my tv be on but knoe picpure you can hear it on and it be chirping

  • Edward
    Edward Nov 29, 2009

    The most common cause for chirping on this model of Magnavox is a fault in the convergence chips. When they fail they will typicaly short out. You can get complete repair kits with instructions from TvRepairKits or just the parts from MCM, Bdent, etc.

    Hope this helps,

  • Mendonca May 11, 2010

    All the wires are disconnected to the circuit boards. I haven't bought the amps yet.

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  • Master
  • 1,139 Answers

Hello,
I posted this earlier but it applies in this case so here goes,

The chirping sound is either a shorted Horizontal Output Transistor (HOT) / Power FET (whichever one is used in this case) or the IHVT (Flyback Transformer) has developed a short in its windings. In ether case both components will have to be replaced. I would suggest you have a qualified TV technician come over and troubleshoot the problem and give you an estimate on the repair.
However, if you are doing this repair yourself take into mind that the HOT and the IHVT (flyback) are in a series circuit configuration and if the Flyback is bad I would change out the HOT also, and vice verse.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Posted on Dec 09, 2008

  • Henry McKelvey
    Henry McKelvey Mar 22, 2009

    Hello,



    I post this only because I have seen this path taken before and it does get rid of the symptom, but it does not get rid of the problem. The convergence IC are usually tied to the same power supply as the Horizontal Output Stage and when the ICs go the cause excessive current through the IHVT causing it to develop a short circuit. That is what actually causing your TV the chirp. If you just replace the Convergence IC your set may work but in a sense you have a ticking time bomb on your hands, because of the IHVT then is functioning with a shorted winding.

    That is why troubleshooting is very important, to find the true cause of a problem, and not just to fix a symptom. Just remember, if you replace the ICs, keep your eye on the set and if another outage happens look at the HOT and the IHVT as possible candidates for replacement.



    That is why at my shop we try to get the customer to buy a maintenance plan, because a TV like any thing else has to be maintained for proper service.



    Thank you,



    Shuttle83




    http://www.electron-age-technologies-llc...

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