Our computer lab uses a Optoma EP732H display. It is working but the images are dark and have a blue/purple color. I am using a dell latitude D505, and I have a smartboard attached. I've tried adjusting the color, temp, etc. It is on data setting, rgb. The conector pins are ok, The projector and the laptop are set to 600-800 high color. Read the manual but no luck for my problem. The bulb only has 200 hours on it.
The website is no help. I have also tried to reset but it won't let me change it to yes.
I have the exact same problem with my EP732H, and in the case of my machine it is not the cable that's at fault. It is also not the color wheel's fault. I believe the green data is not getting processed internally by the projector, so I'm only getting red and blue which makes purple. This happens with all three inputs - the VGA, S-Video, and Composite. I have my machine apart now but have not successfully fixed it. Wish I could get hold of a schematic.
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it is most likely a burned polarizing filter. There is a polarizing filter on the blue light channel and another on the red channel. When black, or other dark colours are displayed, the red polarizing filter is supposed to block ALL of the red light being projecter. If the filter is burned, some light slips through and creates a red tinge on the projected image. If the red tinge only appears on dark images, but is absent when the images is completely white, a damaged filter is likely the problem.
Seems its hard to buy them. Best bet is probably buying a broken projector from ebay and stealing the filters out of it.
The piece that's cracked is called a color wheel. I spoke with the parts department at optoma and they want $300 for a new color wheel for my ep 732h projector. I'm not sure if it's the same part but you can contact optoma on their website and they'll get back to you with a price quote for that part.
Hello...The problem you're describing is related to the green lcd and most likely the main board(green channel). If the focusing removes the purple(you have *that* much dust in the unit?) then it *is* dust. You should be able to focus on the dust particles twice--dust on the front of the lcd and dust stuck to the back of it. I'm gonna give you the color table so you know what to look for and what you're seeing. Red LCD=cyan(baby blue) onscreen; Green LCD=violet(purple) onscreen; Blue LCD=yellow onscreen If you have a lot of dust(and the green lcd usually is the main culprit by the design of the lcd panels around a glass "cube" internally) you might try blowing some air into the unit when it's cool. However, the unit probably needs a good cleaning--remember to clean the dust filter! To properly clean the unit, a trained tech will have to perform the job. The lcd panels are DELICATE and precisely positioned for displaying a sharp image.
Have your projector professionally cleaned. It is dust in the inside optics. You should not attempt unless you are very skilled. if you are going to do this yourself have a lot of compressed air on hand.