Question about Sony Grand WEGA KDF-42WE655 42" Rear Projection HDTV

2 Answers

Spots on the screen

Hi

I have sort of round yllo and red spots on the screen. Someone said that if they are round it is a dust problem. Can u tell me how to remove the dust

Thanks

Ken

Posted by on

  • Anonymous Jan 07, 2009

    blue spots tho

  • chefd55 Jan 10, 2009

    Same problem with the powder puff balls on the screen. I think that it is a dust problem, how do I fix it. I have a bigger problem with the tv turning it self on and off at will, there is no rhyme or reason for it,

    David


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Well I'm an Engineer not an electronics tech but I was able to tear down my KDF-42WE655 and vacuum out the optical block with my TriStar canister vac. The three LCD projeciton panels were very dusty. I was suprised to see how dusty compared to the yellow, pink and blue spots I saw on the screen. Not an easy task to be sure, but not impossible if you are into taking stuff apart to fix it.

Posted on Jun 03, 2008

  • Owenator Jun 03, 2008

    BTW I started with this excellent write up.
    http://splinke.googlepages.com/sonykdf-5...

    The optical block part is a second persons web page near the bottom of that first page. Here's the link:
    http://repairs.sunnyoasis.com/sonylcdtv/

    I also vacuumed up a lot of dust from the fans that cool the LCD panels. My set was purchased in 2004 FWIW.

    Hope this helps!

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  • Master
  • 934 Answers

The dust is on the lcd located inside the optical block. It requires quite an extensive tear down and if you're not at the minimum a CET don't attempt this one yourself... Most shops won't even do this cleaning in the home and any repuatble shop that does it has a clean room they will put it in to do the work..
A single speck of dust no larger than 25 microns on the lcd can shadow in the picture. To give you some idea how small that is a blood cell is 7 microns wide...
Bill

Posted on Feb 03, 2008

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