Question about Optoma EP737 - DLP PROJECTOR - 1500 LUMENS *NIC* Multimedia Projector

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Optoma ep 753 will not light

The last time we used the projector it worked fine. It has had extensive work done on it under warranty, inclucing the color wheel and engine (?). This time it lit for just a bit at full brightness, then dim, then the projector turned the lamp off. It tried for a couple more times, dim and hardly visable and now the lamp light and lamp will not come on. How do I test the bulb to see if it is bad?

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You can just open the lamp and see the condition of the inner tube only. otherwise you have to replace the lamp and run it.



Posted on Nov 19, 2007


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Yes, it can be replaced; but Dell replacement parts are very hard to find. Also, it is tricky to open the equipment and not damage any other parts during the process. If you don't work on electronic equipment, I would take it in for service. Other suggestions on the web say to buy a used one for replacement parts if you want to do the work, because they cannot find service manuals or parts - except for bulbs. The color wheel for my Toshiba was $160, and the lamp was bad at the same time.

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first of all check the tint setting on your projectors picture menu.
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i have added a video how to clean the color wheel . not the same projector.

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1 Answer

HD70 DLP Projector: The projector is used and about a year old. It cur...

Did this start occurring after you replaced the lamp?

The reason I ask is I had the same issue after changing the lamp and it was caused because when I took out the old lamp I noticed dust in the lamp housing which I attempted to blow away.

This caused the problem because some dust got further into the projector, specifically around the color wheel. I sorted it out by taking the projector apart following the instructions here:

(note my HD70 was out of warranty, if yours is not, I would recommend contacting Optoma to get it fixed).

Follow the above instructions to step 14 and then locate the color wheel which is at the front of the projector behind a dark gray, plastic type square shaped cover.

You have to be very careful here, but remove the color wheel (there is one screw holding it in place) - note it

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Color wheel sounds like a buzz saw. Fan is quiet because there is no noise in the cool-down mode. Can this be replaced by user?

Baily, I have had my HC1500U color wheel replaced two times due to the color wheel's unpleasant "buzz saw" effect showing up every few thousand hours of usage. It is happening again for the third time and I am still within Coscto's warranty so I am going to have it replaced again...will never buy a DLP projector again...too many moving parts that can break!

Would love to be able to replace it myself if you ever find a place that sells the color wheel.

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Color wheel in my InFocus ScreenPlay 4805 projector

The 4805 Color wheel part number is 525-0146-00

You can buy it from AV SOLUTIONS in NY

As far as if it's worth it... That's up to you.

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My first questions is:

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Let me know so I can help trouble shoot other possible problems.

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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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Clean optocoupler under pcb 4554B on color disc wheel.
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