Question about Pioneer PureVision PDP-502 50 in. Plasma Television
I have posted this problem before and didn't get any responses. So, I'm hoping someone out there takes the time to read this, and at least lets me know if the is a worth fixing problem, or a dumpster bound plasma. I have recently started seeing pink pixels across the screen, sometimes more noticable than others. There are times when I have a beautiful HD picture with out a trace of a problem, then the scene will switch, and I can see thousands of pixels across the screen about 1/3rd down from the top. I can see them whether it's HD I'm watching or standard. Sometimes they are barely noticable, sometimes I can even see what I'm watching. Dark scene, bright scene, doesn't make a difference. Does any one know I this problem would be in the plasma display panel, or within the electronics?
Try putting a fan on the back of the tv to see if it is getting better. If it does then you probally have a board that is overheating. If that is the case then CAREFULLY !!! remove the back and place where you can turn on and safely access the open back NO TOUCHING STUFF !!! Mabey lay it face down on a glass table or lay it on a table with 25% hanging over the edge to see the screen. Then take a COLD blow dryer and blow it on the boards to find out which one makes it get better. If one does then it will probally be your problem board. Make extremely sure that is the one before removing it by blowing from all angles on the boards around it without air hitting the suposed problem board. Then try a little hot air to see if that starts the problem on that board so you can be sure. Of course check the surrounding and offending board several times to be sure before removing.
Posted on Jul 12, 2008
If these pixels are always in the same place, then I would suspect the plasma display panel. Pioneer is best known for their "Elite" series HDTV which have great picture quality, but for my money the rest can go to the dumpster. If the pixels change to different areas of the screen, then you probably have induced electrical noise in either the wiring or the circuits. Could be faulty engineering or workmanship. In that case, it could be worth getting it looked at. You may need to display a "static" picture, either from freezing a DVD scene, or getting a calibration DVD to see if these pixels are always visible. If the pixels only become visible after being on awhile, it could be the heat build-up causing a solder connection or semiconductor to act up (this model does use 470 watts of electricity when on, and you know that puts out a lot of heat to help breakdown components). Sorry I can't give you a magic cure, I absolutely refuse to work on pioneer TV's so I'm "out of the loop".
Posted on Jan 03, 2007
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