Question about Sony Grand WEGA KDF-42WE655 42" Rear Projection HDTV
Both of these answers are incorrect but the first one is very close. When the lamp door warps, the picture keeps proper color but looses brightness. The second answer is just completly wrong. This set does not have a color wheel.
This set needs a new optical block and cleanning. The picture will be good as new with that. The Sony tv's are not DLP, a Texas instrument chip technology. A Digital light processor has a lamp, a color wheel and a optical chip that works together to produce the picture. A Sony has a lamp but uses a combination of mirrors and light filters to send the lamps light through 3 LCD's. The LCD's are about in inch in size for each color red, green and blue. They have millions of tiny mirrors inside to make up the picture. This method creates a better black in the video and eliminates the rainbow effect, better than a DLP but makes the LCD's work harder and heat up more because of location to the lamp. the most common problem is the blue (The closest to the lamp) starts to loose its ability to pass light so the picture gets blotches of brown/yellow because the blue is missing or reduced. The light filters collect dust and because the light is so bright when it passes though, it actuly burns the image of the dust into the filter. A home that is dusty and people smoke in will ruin one of these sets in 1,000 hours of use. A clean smoke free home will see over 4,000 but this was a problem with design and is most likely to happen again and again. Hope this help and good luck.
Posted on Apr 20, 2009
The optical block is defective on your TV. Actually it's a Sony defect where the lamp door warps due to the heat. Sony issue an alert on this issue and will fix it until April It happens on these models 2003 Models: KF42WE610, KF50WE610, KF60WE610, KDF60XBR950, KDF70XBR950 2004 Models: KF42WE620, KF50WE620, KDF42WE655, KDF50WE655 They will fix it free of charge until March 31, 2009. So I will call them asap to get an authorized Sony repair person to look at it.
I would suggest to contact sony first and let them know about the defective optical block in your TV.
Posted on Mar 09, 2009
I concur with john220
Posted on Feb 27, 2010
Nope, light is fine, that is either a bad color wheel worn in the middle, or a fried convergence IC that is causing a weird effect because of color convergence not matching.
If colors are not matching , then it is convergence, if it is like an intense light in a circular shape, then it is a faulty color wheel.
Posted on Mar 07, 2009
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Posted on Jan 02, 2017
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