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Dark spot in center of projected imAGE - InFocus X1 Multimedia Projector

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Posted on Jan 02, 2017

projdoc
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SOURCE: Tranlucent dark spot on Optoma image. Looks like

is it an optoma or an infocus? if it is the infocus, it needs to be replaced. however, to replace it, you need to remove the entire optical engine. now off of that, remove the clorwheel and clip, the main board, and the tunnel (on this model it is called an integrator rod) assembly. to get that out, remove the 3 tap screws and the large screw. once you can slide it out, remove the foil from the front, slide out the inside tunnel assembly, remove the clip, then the tunnel. because the clip is an exact fit, you cannot have anything on the tunnel that increases the size. reverse the instructions to reassemble (but you will need to replace the foil with a new one). warning: you now need to realign the tunnel using 2 of the tap screws. if you have not done this before, it is very difficult and dangerous, as you need to have the projector powered on and the screws are way inside next to the power supply. there is a risk of electrocution and damage to the projector. best bet- send it in to an authorized infocus service center for repair. try av solutions in ny. they're really good. www.avsolutionsny.com

Posted on Dec 01, 2009

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2 Answers

Vivtek d510 projector has black and white spots covering 1/3 of projected image


The DLP Chip is failing .The DLP or Digital Light Projection Chip contains up to 8 million tiny microscopic mirrors that tilt to project a digital image onto the screen. These mirrors are failing causing light and dark spots to appear.Unfortunately fixing this projector is probably going to cost more than buying a new one. Hope this helps.

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A plastic prism between the lens and the lamp is melted. can't find part no. PLNS-A056WJN2

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Yup. What happens is, from the heat of the lamp, it begins to warp and gradually sag in the socket. As such, the light no longer gets projected onto the screen as it should.
It will likely die within a week or so, altogether. You will indeed need a new lamp. Make sure the TV is not knocked while in operation - that can cause your lamp to quite literally break (in two!) on the spot.
Learned that the hard way with my projector, which is built around the same principles as a projection TV.

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1 Answer

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OUCH! LARGE DARK SPOT IN CENTER IS NOT GOOD FOR PROJECTION TV. YOU BURNT THE TUBES. THE LOSS OF COLOR IS THE ROOT CAUSE SOUNDS LIKE A DEFLECTION CIRCUIT PROBLEM. THE TIMING FEEDBACK IS USED TO SYNC THE COLOR CIRCUIT. IF THE TUBES LIGHT WITHOUT DEFLECTION THEY BURN THE CENTER PHOSPHOR COATING INSIDE.

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1 Answer

There is a large dark spot in the lower center portion of the projection area, I have cleaned the external lense and changed the bulb but the dark image remains.


if the spot is circular, check the lamp itself. if it has a flatter edge, chances are your light tunnel has collapsed and needs replaceing. it's not that old, so dell might repair it. but they might replace the entire optical engine, as they may not sell individual parts.

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Its an acrylic condensing lens inside the light engine that has melted/warped. You have to pullout the entire light engine then disassemble the optical light tunnel to get too the lens. Then you need a lens-smith to cut a new lens because Infocus won't stand behind this design flaw. Its really a shame on Infocus!

If you need more info contact us here: click here

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Do you have a center speaker near it? maybe move it, that is what I have done and it seems to have gotten better.

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1 Answer

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you may have touched the bulb while changing it and minute traces of skin oil are on the actual bulb, with the machine cold, try and very carefully clean the bulb

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I had a similar problem and brought it in to a technician for a quote of $860 to fix. The problem - speck of dust on the optics. If it weren't under warranty I would take it apart and blow off the dust myself.

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What is the difference in metering among multi-segment, spot, and center-weighted?


Multi-segment metering uses 256 segments to measure luminance and color. This data is combined with distance information to calculate the camera exposure. This advanced metering system will accurate worry-free exposures in almost all situations including backlight condition. Spot metering uses a small circle area within the middle of image to calculate the exposure. The spot allows precise exposure measurements of a particular object without being influenced by extremely bright or dark areas within the scene. Center weighted measures light values over the entire image area with emphasis given in the central region. In backlight condition or when the subject is not in the center of image, exposure compensation will be required.

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