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Help Feel really dismayed only had my thomson 44" rear projector for 2 year and colour wheel motor has gone , cant get part from manufactures cause they have gone bust , tried online parts shops , they cant get one . Someone sent me a message saying they would sell me there old tv for parts but he has only signed in as a guest so i cant seem to get back to him , Help!! any suggestions thanks !

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Try mcm electronics there were a rca dealer

Posted on Feb 01, 2008


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Hi there,
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I'm pretty sure my color wheel is broken, and would be fine W/ replacing myself, but can't find where I could buy one. I have learned that the collor wheel is supposed to have4 segments, and have 2x...

Simple answer No! Colour wheels do run at high speed (I think around 20,000rpm and you can get 4 and 6 segment colour wheels i.e for each get better colour definition for the higher end ones.

Remember the colour wheel is a precision device as It has to rotate in sync with the DMD chip as each different frame of colour information is sent to the dmd chip.
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size of motor- will it fit
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I'd be looking for an original, see if your authorised repaired would be happy to sell you a genuine one on the basis of no warranty no return.

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They are expensive to replace, so you might want to try taking it apart and cleaning it out. Add a small amount of 3 in 1 oil to the motor if you can.

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The part to clean is the sensor that wraps around the colour wheel or some thing on it's axle.
This sensor identifies when the colour wheel has made a revolution and syncs the video output to the right segment in the colour wheel so only the red image is displayed when the colourwheel is filtering red, etc...
If the sensor gets dirty it will not be able to tell exactly where the colourwheel is, and in my case started to report a segment off.
Consider this before you take your machine apart.. I live in New York City, and this area is rather dusty.. I've had my projector for 2 years running pretty constantly, so it was pretty dusty. I mention this because there are other possible causes to this problem. It could be an electronic issue.
There were three things that convinced me it was a colour wheel issue : 1) The problem appeared slowly over the period of about 2 weeks.. First it started flickering, and then all of a sudden it would switch back and forth.. 2) The color white was fine. In fact, the image was fine, just some colors were switched. I could even fix the image by adjusting the hue in my video.. 3) My machine was full of dust..

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From there you can clearly see how the bulb shines through the colourwheel, and then then light enters a closed chamber (sealed, I assume, from dust).
If you are not able to locate the colorwheel after this, maybe take some pictures with the case apart and send them to me.. I'll look for a manual online in the meantime..
Also, I'd be happy to talk to you over skype to get more detail.


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