Having problems with my 4663W. The bright scenes are perfect, but when a dark scene or dark color even comes on the screen its very hard to watch. Almost has a weird shine to it or a redish tinge and blurred. I have not changed my color wheel. Any help would be appreciated as it makes it no fun to watch anymore!
This is a fundamental limit of Ti DLP. The part can not reproduce low grey scale, so low light film is dominated by artifacts. It helps to sit farther away from the screen. The color shift is caused by a factory tollerance on the color wheel, but there is no user adjustment for it.
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Your CRT's getting old. Plus dust on lenses don't help much. You have to open front frill (below screen) and back of the TV. Clean up lenses using dry paper towels, do not wet. In front of the TV after grill remove center cover and locate "black box" that have 6 potentiometers on it that looks like plastic adjustment screws for philips #2 screwdriver slots. 3 of them should read "Focus" These you don't touch. Another 3 reads "Screen". Put some still image on your screen (like paused DVD movie frame). Carefully add brightness in all 3 colors trying to avoid horizontal lines appearance. If lines show up, just turn it back a little. Try to keep color balance looking at the picture. This procedure will brighten up image but further reduce CRT's life.
In case that you posted wrong model here and you have DLP Projection TV - just replace the lamp.
If you are getting the same problem with both TV monitors it could then be assumed it's an input problem to the TV monitor. If you are using a digital output from your receiver it could be the cabling. If you are using an analog output from your receiver it is probably coming from the receiver.
Digital video processing does have issues with darker scenes.
Can you try another video source seperate from the receiver like a DVD or better yet an analog VHS, if you still have one. Good luck and let me know.
The mirror should also be cleaned. but there is more adjustments that can bring up brightnes ie G2 on the flyback transformers but that is some thing a tech should do. Because you have to ad enough of each color to get a gray scale. if you are off the picture will be tinted and your color will be way off.
The Picture tubes(not bulbs) do and probably are weak. There replace should only be done by a trained service person. One reason would be the hI Voltage issues related to the crt's, as these tubes store alot of HI voltage even after its unplugged for a while, and another reason would be that these tube can very easy implode then explode and that wouldnt be a pretty sight. Third would be the alighnment involved after all three tubes are replace. There ba cross hatch generator and alot of time involved with the alighnment. Please seek a pro to assit you when your ready to spend at least 900 TO 1000 bucks. Good Luck