AVS Forum Special Member
Join Date: Apr 2006
Location: Frisco, TX (D/FW area)
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Ordered the part off of eBay and using this thread successfully changed the color wheel on my HL-R7178WX screen. Two ginormous thumbs up on this thread.
My set had of late started emitting a humming noise consistent with high speed rotational vibrations. The screen never looked wrong, and knowing the DLP fairly well I concluded it the only thing that could be making such a noise was the color wheel, the sound was far too "vibrant" to be a fan. Finally one day - no sound, but no nothing. Set would cycle a few times and then all the lights on the power switch would blink.
So, I got the wheel, and using these directions, replaced it successfully. I was worried about the color wheel mount in that loose rubber surround - that's a design flaw of the first order. The first time I turned it on, I thought it didn't work - it was SO QUIET. I had forgotten how quiet it was supposed to be. But the picture came up, and no shadows. I haven't gone in to mess with the color timing - hard to tell if I have a problem, sometimes it looks like washed out color faces, but that's normally an SD source with questionable quality. HD images are perfect.
When I replaced the wheel, I noticed a piece of hardened plastic in the wheel well - the wheel itself was intact, but this detached plastic looked to be part of what balanced the wheel. I figure it broke off, which unbalanced the wheel, which simply wore the motor down over time. The wheel spun fairly freely when out, but with a noticeable grind - the new wheel did NOT spin very freely, but was smooth and made no noise.
Again, this thread was an enormous help, thanks to the OP for a great guide that got my TV fixed for $100...