Question about Philips 50P8341 50" Rear Projection Television

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Projection tv is Blurry and offset

Believe it or not... i found a projection tv in the trash... it's a phillips magnavox, i cleaned out all the lenses; replaced the coolant in all lenses tv seems to work great. I bought a phillips universal remote that works allright. I adjusted the convergance until it seemed the best it could be the only problem i seem to be having now is... it seems a bit blurry, i can see blue green and a lil red offset from eachother at the top and bottom of the screen... its very noticeable on widescreen movies... i can actually see a green bend on top and bottom. the middle of the screen everything seems fine, also at the top and bottom the picture has a little bend to to it... if anyone could help me figure out how i could get this focused and sharp i would really appreciate it....

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  • toastedstrud Dec 20, 2008

    Where is this box located??

  • toastedstrud Dec 20, 2008

    ive messed with something like that in the back, but the top makes it brighter and the bottom makes it sharper, ive already adjusted those to the sharpest they can be....

  • toastedstrud Dec 22, 2008

    k i did that but i still see bends at the bottom and top, the middle looks fine color wise but the bottom the screen is showing the colors offset

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  • Philips Master
  • 5,138 Answers

You have a focus and screen control box it has 3 controls on top 3on bottom these are the controls for Red-Green-Blue screen drives and for focus to each tube. IT should have Focus /Screen on it.

Posted on Dec 19, 2008

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  • ladywinn
    ladywinn Dec 20, 2008

    It should be either right above chassis in back of tv or in front behind speaker cover black square box with 3 controls ontop and 3on bootom 6 controls all together.

  • ladywinn
    ladywinn Dec 20, 2008

    Thats the focus/screen drive block for tubes.Turn color off ,in menu now adjusted all 3 tubes untill you have a black and white picture get as close as you can - Now ture color back up and see what kind of picture you have .

  • ladywinn
    ladywinn Dec 22, 2008

    Has the STKs been replaced in set they maybe what is causing alot of your problems. STK ics control alot of different circuits mostly convergence and will affect power depend on which one that is bad thats why you must replace both ics they are big black chips will say STK???-??? what are the numbers on your STKs?

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It sounds like the lens fluid has gone sour. Take a look at this Fixya tip for more information on replacing the lens coolant. When it's real bad you won't be able to see the crosshairs sometimes. http://www.fixya.com/support/r11932741-convergence_repair_dull_video_repair

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