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Hello! I am still in search of an answer to my Panasonic Plasma TH-46PZ80U. The picture is virtually non existant. The sound is ok, but the Picture is a Red to purplish haze, you can see a hint of the picture in the background. This started awhile back, and was intermittant until yesterday and it just stayed red to purple. I was lead to believe that it something to do with convergence, I dont know if this is correct, if it is , Where are the IC'c located, as I have the back off of my TV right now. Thanks

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  • inspectionga Oct 05, 2009

    hello! Thanks for your quick response, in reference to the heat sink problem you mentioned on my Panasonic TH-PZ4680U, is there a particular board to check first and do I need to remove the board to see the loose/cold solder joint at the pins

  • inspectionga Oct 05, 2009

    Thanks alot, sounds like I might need you to come to the house. ha ha Been to Arkansas lately? Thanks a million
    Derek

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Plasma TVs do not have convergence ICS or convergence circuits.
If you did not know this , you should not attempt repairing the TV.

If picture is very dim and faint, that is usually caused by bad sustain boards, sometimes a faulty plasma panel or a different problem related to high voltage circuits.
Sustain boards are located at two sides of the plasma panel, and their function is to keep the high voltage on plasma panel. They are familiarly called Ysus, Xsus and Zsus, depending on their location and on the model.
In your model the boards are Y sus and Xsus. Parts are expensive and must be tested before replacement. Test is done measuring impedance on boards resistors, reading voltages etc.
Here the parts:
YSUS SC BOARD TNPA4410 AB from PANASONIC TH-46PZ80U
XSUS SS BOARD TNPA4411AB from PANASONIC TH-46PZ80U
Regards

Posted on Oct 05, 2009

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Sounds more like a heat sink has a cold solder,look on back of circuit board,for a burned out solder joint on a heat sink,You can repair this your self ,with solder and a solder iron.The factorys some times don`t solder all the componets in properley with the robotic irons.So check it out,it will be a burned out place with the heat sink legs showing threw.I hope this helps you.

Posted on Oct 05, 2009

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