Question about Sony Grand WEGA KDF-55WF655 36" Rear Projection HDTV
I have a 2 year old KDF-55WF655 which is currently exhibiting discoloration in certain areas of the screen. The color varies in realtion to what's being shown on the screen, but in most cases it's a shade of magenta/pink, sometimes more of a blueish, but again it all depends on what's on the screen at any given moments. This same problem happened nearly at the same time as the lamp burned out, just before the 1 year warranty was up. Not surprisingly, the lamp just had to recently be replaced again, almost exactly 1 year later, so the timing is very much in sync with between two failing components. I don't have the record anymore from the first repair, but I THINK he replaced the optical block or the optical engine, but I'm not sure. I know he mentioned those things, but I'm not positive that's what he replaced (though I know for sure he also replaced the lamp at that time). The lamp failure was causing the TV to turn off and on constantly, with the red light flashing, nothing to do with the current discoloration problem. Unfortunately, this was my first LCD TV at the time and I didn't know at the time how essential it is to buy extended warranties with them >:(. I've since learned that lesson and have them on my other 2 LCDs. Anyway, if anyone knows for sure what the problem is, what part # to purchase and how to replace it I'd greatly appreciate it. Thanks!
I had the same problem on a 50" Sony Grand Wega KF-50WE610. There were splotches that looked dim blue if they were against a white background, and dark blue if they were against green, but it was like a bruise. There was no rhyme or reason to it, it started in one place, got worse in another, but became unbearable when it crept down to the bottom of the screen, where it would make everything have a blue hue. I actually had another problem with the TV that required me to have the Light Engine replaced (blue pixel), and when the light engine was out, I could see a orange-red film of some sort had formed on part of the light engine that was facing where the lamp would be. I asked the technician about it, and he said all you have to do is wipe it off with a soft cloth, like the kind you use on the screen. He showed me with one of his cleaning cloths, and sure enough, it came right off. As we were putting the TV back together, I noted the location of this collection mirror, and it can be reached through the same opening you would use to replace the lamp. If you take the lamp out, the collection lens will be right behind. IF it appears to be covered by the orange-red filmy crud, just take a soft cloth, and wipe it off.
Posted on Sep 13, 2007
In some cases , the optical block can be blown out with air. It must be remove to do so. if air dos not work , then the optical block will have to be replaced. I have had lots of luck blowning out the dust from the optical block with a air tank , cans of air dont have enough force
Posted on May 30, 2007
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