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Join Date: Dec 2006
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I'd love to re-search the entire forum and go through 10,000 posts, but look up the user UMR and how he reported contrast loss on Sony's. As far as the color wheels, it is based on hard drive motors, the motors are more reliable than in the past, it's a fact. Also they re-designed some of the way the color wheel attaches to the posts and made it more sturdy, this is in combination with the fact that the newer color wheels are definitely not an identical design to the ones they used in the past on the sub $5000 DLP's (different as in different revision, updated revisions generally mean higher reliability). This could be circumstantial evidence, and admittedly is partly anecdotal, but then take the logic of this and apply to what you read in the forums. They are putting faster color wheels in cheaper projectors, the design is more refined, just like newer hard drives are generally speaking more reliable than older hard drives. Technology gets refined over the years, even though it gets cheaper at the same time.
Very simple, number of recent posts I've seen about failing color wheels (even though from 2009 to 2013 CHEAP DLP projectors for HT outnumber the sales of all older models probably 10:1 (since in the past we had more variety of DLP models for Home Theater), so just look in the Optoma DLP, Mits hc3800/4000, and Benq w7000, w1070 threads). Number of times I've seen anyone report a color wheel failure on these DLP threads, less than 10 (maybe about 10 total).
On the older Benq and Optoma threads, I remember more color wheel failures in a single thread than all the recent threads combined, even though in the recent threads there are way more posts.
How do I know LCD polarizers still fail, very simple, I know people in this business and I've talked to a repair shop, and it's been reported many times in the forum on both business LCD projectors and HT DLP's. Furthermore, DLP is the only projector with a fully closed light path and a single chip, the other techs have more parts in them (simple as that), more parts = more likely to fail.
It is a known industry fact that DLP is not as suceptible to long-term heat as LCOS or LCD (inorganic or organic) IF all else is equal, nothing to debate on this last fact.