Question about Mitsubishi WS-65809 65" Rear Projection Television

1 Answer

Concave distortion on top and bottom of screen

I have been getting a concave appearance on the top and bottom of the screen usually worse when we first turn the TV on. It seems to go away after about 15-20 minutes whent the TV warms up??

What causes this? How can I fix it? How much will it cost? Where can I find a TV repair person?

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  • Anonymous Feb 16, 2008

    bowing in at top and bottom of screen

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  • Master
  • 1,694 Answers

Bad convergence IC's ....change both for reliability...part number
STK392-570...located on center PC board.................T.

Posted on Feb 28, 2008

  • Vista Electronics Feb 28, 2008

    Small,local repair shop should charge 300.- 400.00 max..

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There is a concave on the top of the screen and bottom of the screen whenever i try to readjust the convergence i can get 6 out of 8 crosshairs perfect but i cant get the top and bottom due to the concave...


Hello; You have a failed convergence board. JVC does NOT give me ANY info. They won't even talk to me on the phone! On some sets, there is a digital convergence board and a power convergence board that actually drives the convergence yokes on each of the 3 CRT's. If you have both, either one is bad and probably expensive. I recommend people Don't buy JVC products due to their bad reputation. John

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Projection sets have two very common problems.

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These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

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Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

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The convergence ICs are located on the left board on a huge heatsink they should be STK392-110 or STK392-120. You can get replacement ICs at the following link and they also provide free step by step instructions on how to remove and install the new ICs.
http://servicemanuals.vstore.ca/

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