Question about Mitsubishi WS-65907 65" Rear Projection Television

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Colors seperating on screen red green blue - Mitsubishi WS-65907 65" Rear Projection Television

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WS-65907?

This Mitsubishi uses 2 of the STK-392-570 convergence chips---both along with any damaged resistors around them need to be replaced and the set adjusted.

The repair involves getting the center circuit board out of the set to replace the chips and or resistors.
Most shops try to charge 300-400 for this type of repair---both chips can be purchased on Ebay for about 15 dollars plus shipping.

If you are able to do the repair yourself you can save a lot of money---look at some of my other posts here for more information. I have repaired hundreds of these sets with this problem---A white grease called heat sink compound was applied to the back of each chip to quickly transfer heat from them to the large metal heat sink they are attached to. After several years the grease dries out and one of the chips overheats and fails.

If you are not able to do this repair yourself--shop around your area---And if they say it has to go to the shop---keep looking---any good tech can do this repair in your home in about one hour---here I charge 200-250 depending on the set.

I am here to help people and I do this for free. If you have any questions or need advice reply to this posting. Feel free to rate this solution if it helps you.

REGARDS, SD TECH

Posted on Sep 26, 2009

  • woodbs Sep 19, 2010

    i think this may be my problem? now the set will not even power up

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1 Answer

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1 Answer

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First adjust the contrast level 25 percent.Now see there is any improvement. If the performance is well there is a problem in video section. May be capacitor leakage like 180v supply filter, and coupling capacitor in video section.

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