Question about InFocus Proxima DP6155 Multimedia Projector

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Color Alignment We're having a problem with a ceiling mounted projector. The RGB signal seems to off, the colors are out of alignment on the left side of the screen. This alignment issue shows up when using the video input port or the computer port on the projector, also we swapped cables, so that leaves the projector.

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Re: Color Alignment

Reset the settings to factory default. then re-solder the fingers on the edge of the power supply board where it goes into the main board edge connector.

Posted on Dec 29, 2009

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Hi there

There is unfortunatelly no section in the Service Manual to explain this sort of procedure.

You'll have to move the LCD panels one by one - millimeter by millimeter.

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Have you tried using the video inputs, Is it able to show red then ?

If not & you have reset the factory settings the prisim or mirror's may have gotten out of alignment in shipping, Or it may have a bad lcd panel or the red lcd may have a bad connection or driver circuit.

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Do you have the projector inside a hush box? If so, it could be too far back in the box. Readjust and see if that removes your shadow.
You may have a haze on your lenses. Have you tried cleaning your color wheel and associated lenses? This procedure is for the skilled since you must disassemble your projector. Keep in mind that the color wheel is VERY, VERY fragile. Use a lens cleaning agent or 91% isopropyl alcohol and q-tips. The agent must not leave a haze. Have plenty of time and patience since this may take you about an hour just to clean the color wheel. Did I mention that the color wheel is VERY fragile…

This link may also be helpful. See section 5.10.

I hope this helps,

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1 Answer

How do I align the color on an MT850


pls check the board before the color wheel, as it is noticed that this problem comes with the main PCB Board.


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Color alignment is off

i also have the exact same problem. i picked up 3 of these used for my work and kept one at home. I knew one had issues and another had a burned out bulb and so on. I had a repair place to combine the two to make one good one. The repair man said that they had a real hard time keeping the color locked in alignment. It's not a physical alignment, its controlled by the board output and somehow the board can be adjusted. It was vague to me. After about a good couple of years of hard use the one at home is now doing the same. On one hand I want to fix it but I dont even have a plasma so I may go and spend $800-$1000 on a hi def DLP. At that price it won't be the best but it will rock this projector. that would be my advice rather than putting more money into this old model. 

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If you are handy with allen wrenches, quality screw drivers, and the like, you might 'try' opening up the can of worms and gently manipulating the red LCD panel (it will be obvious--a magenta color when off), by slightly loosening the holding screws, then moving--ever so slightly, the panel untill the ghost disappears. Do not do this though, untill you mark the present position on the top and bottom of the LCD panel. Take pictures, far and close-ups, as you go so you can reassemble the unit. The typically three LCDs can be located by finding the prism cube, located under the circuit board, and just before the output lens. Be patient, and have fun. I did this with an 'out of wack' throw away, and now it is just as enjoyable as my 'dimmer' HDTV projector. Even side by side, from 8 feet away, when both are making 72" images, the HDTV is barely clearer, Jon.

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the lcds areout of alignment. you'll need to send it in to a service center to have them do it. you can try yourself, but you may need special tools.

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take a look here:,1697,1049289,00.asp "... The others, however, have lost portions or all of their blue channels. TI's theory is that the shorter wavelength and higher energy of the blue light apparently causes the organic polarizing material in the LCD to get lightburn much faster. TI showed us a damaged LCD panel that controlled blue light transmission, and there was a large spot in the center that was apparently burned out..."

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