Question about Epson EX7200 Projector

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Yellow line on epson ex7200

Right side of screen. How to adjust light tunnel?

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Epson Powerlite 7300 Display Problem

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Posted on Feb 13, 2008

astig1977
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SOURCE: My Epson EX7200 was purchased May 3rd and until

I would recommend contacting Epson support. Your projector should have a 1-yr manufacture warranty, and they can verify that once you give them the serial number of the projector. In the meantime check your computer cable (if that's the input you're using) for bent pins. You can also apply the "Reset All" option, which restore all the settings back to factory default. However, in some cases the blue LCD panel might have gone out also.

Posted on Jun 21, 2011

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1 Answer

Epson ex7200 yellow picture


all three RGB light not work together.

Nov 25, 2013 | Epson EX7200 Projector

1 Answer

I have a line down the right side of my screen, it still projects but the line and it is darker on that side of the screen; what can cause this?


The light tunnel is either out of adjustment or collasped. Given the age of your projector I would say it is the latter. This will have to be repaired by a tech or you may be able to fix if you can get the part and a service manual.

Nov 14, 2010 | InFocus ScreenPlay 4805 Multimedia...

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Its not lines more of hazy or blue shadow from top to bottom of right side of screen


the light tunnel is out of adjustment or is collasped.. you can take the cover off (with the machine unplugged) there are 2 screws on the engine,1 you can see thru the hole in the top off the main board, the other is down next to the power supply. that is the one you need to adjust. you will need a small allen wrench that will fitin the screw and still be able to turn it without hitting the power supply. turn the screw towards the direction of the banding. try 3 small turns and put back together and see if its better or worse. if better adjust some more, if worse the tunnel has collasped.

May 12, 2010 | InFocus LP70+ Multimedia Projector

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X2 projector A somewhat irregular vertical line has appeared near the middle. A slight rainbow affect at the line, right of the line gets progresively darker. The blank screen is normal. The projector is...


this projector does not have lcd's. it has a colorwheel and a light tunnel. the light tunnel has probably collapsed and needs to be replaced if you have distortion in the middle of the display. if it were to one side or the other or a the top or bottom it may have been adjustable. But wiith it being in the middle, I'd have to say you needed a new light tunnel.

Mar 12, 2010 | InFocus SP-LAMP-018 Projector Lamp for X2,...

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Infocus dlp 70+, there is a dark yellow line from


this is the light tunnel being out of adjustment or collasped.

Mar 11, 2010 | InFocus LP70+ Multimedia Projector

1 Answer

Infocus 4805 has yellow line on the right side of the screen


It will be the light tunnel. Apparently it is very common in the 4805. See here for how to fix it, by the way you cant get parts so its a DIY job.
http://www.avsforum.com/avs-vb/showthread.php?p=6744737#post6744737

Feb 21, 2010 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

New Problem after fixing Light Tunnel on a SP 4805


It sounds like you have mounted the replacement light tunnel incorrectly. It is a common error. What has happened is you have the light tunnel sitting on yop of the positioning stop which is opposite from the color wheel side. If you take it back apart you will see that it's not laying parallel to the casting. if you reposition it so it is just touching where the opening is in the clamp on the color wheel side you will feel it fall into place.

Jan 22, 2009 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

Grag line 4" on left side of tv


This is because one of the mirrors in the light tunnel have fallen. Common problem on your model. There are several ways to fix this, I have seen some people be able to go in and glue it back in place, others have bought a new light tunnel and put it in, and some have to replace the whole light engine to get it back to normal. The difficulty with this repair is the mirror that we are talking about here are small and difficult to handel and get back in the right place. The light tunnel is located next to the color wheel. There is the lamp to the right of the color wheel and the light tunnel is to the right. If you decide to try to fix the tunnel yourself be careful it is delicate and not always easy to do. Let me know what you would like to do and I will help out however I can.

Tim Nolan

Sep 12, 2008 | Samsung HL-R4266W 42" HDTV-Ready...

1 Answer

Lp70+ display shows a solid black vertical line


the light tunnel is either collapsing and blocking the light going through it (and needs replacement) or the vertical/hoizontal adjustment of the tunnel. if you take the lamp out and move the colorwheel (with a pencil eraser) to the clear section, you should be able to see a square through it. if part of the square is blocking the middle, the tunnel needs replacing.

by the way, on some projectors the light tunnel is called an integrator rod.

Jun 17, 2008 | InFocus LP70+ Multimedia Projector

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