Question about InFocus ScreenPlay 4805 Multimedia Projector

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New Problem after fixing Light Tunnel on a SP 4805

I was experiencing the common "Yellow bar" symptom on the right of my screen (unit ceiling mounted), and by everything I read here, I assumed it was a light tunnel issue. I disassembled the 4805, and sure enough, the light tunnel was separated. I bought a broken 4805 online and removed the intact light tunnel. I reassembled with the new light tunnel and now I have a similarly colored bar (more like a reddish-yellow shadow) at the TOP of the screen. Is there an adjustment that needs to be made, or I have damaged something else?

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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.

Posted on Nov 29, 2009

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Hi my infocus projector 4805 glass filter has fallen out, how do i fix it pls (ps i am a technologically incompetent female so need non techy language pls :)


Its commonly refered to as a Light Tunnel Failure. Go to www.avsforum.com and search for "4805 Light Tunnel" and you will finds threads on how to fix the problem.
If you have never opened the PJ before, there are 1-2 threads about opening the cabinet.
I also posted a DIY replacement solution that may help:
http://www.avsforum.com/avs-vb/showthread.php?t=1304694

Jan 06, 2011 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

Dark haze left side of screen about 4 to 6 inches wide only in the wider screens not in the native


Its a Light Tunnel failure. Go to www.avsforums.com and search for 4805 Light Tunnel. There are instructions to open the PJ and repair the Tunnel. Also, I posted a DIY replacement option in lieu of fixing the very fragile tunnel.
http://www.avsforum.com/avs-vb/showthread.php?t=1304694

Jan 02, 2011 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

Half of the screen is dark. Tried a new bulb wilth no effect


Sounds like Light Tunnel Failure. Very common. Biggest problem is that a replacement part is almost non-existent and a manufacturer repair is expensive.
You can get further details on the problem at www.avsforum.com. Just search for "4805 Light Tunnel" and you will find threads about DIY repairs.
I also recently posted a DIY Replacement thread for anyone willing to make their own tunnel:
www.avsforum.com/avs-vb/showthread.php?t=1304694

Nov 24, 2010 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

Starting to get an orange shadow on the right side of picture


If you have not already found out, your problem is Light Tunnel Failure. It is common and can be corrected DIY. Replacement part is nearly non-existent and manufacturer repair is expensive.
For additional info go to www.avsforum.com and search for "4805 Light Tunnel". You will find threads about the problem as well as fixes. I also posted a DIY replacement option as well:
www.avsforum.com/avs-vb/showthread.php?t=1304694

Oct 18, 2010 | InFocus ScreenPlay 4805 Multimedia...

2 Answers

We have a screenplay 4805 by infocus. the right third has a dark shadow over the picture? the picture is lightly visible thru the shadow.


the light tunnel under the colorwheel has collasped or the projector has been jarred, knocking the mirror inside of the lens assy. out of alignment. Either way, it will have to be repaired by a technician.

Oct 03, 2010 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

I recently had my lamp go out for the Infocus SP 4805 projector. When I replaced the lamp, the projection/imapges had discoloration in a couple of spots on the screen. not completely black, but discolored....


If you have not already found out, your problem may be a Light Tunnel Failure. It is common and can be corrected DIY. Replacement part is nearly non-existent and manufacturer repair is expensive.
For additional info go to www.avsforum.com and search for "4805 Light Tunnel". You will find threads about the problem as well as fixes. I also posted a DIY replacement option as well:
www.avsforum.com/avs-vb/showthread.php?t=1304694

Sep 13, 2010 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

Left side of screen has shaded area as if something came apart and is blocking the projection of the media


If you have not already found out, your problem is Light Tunnel Failure. It is common and can be corrected DIY. Replacement part is nearly non-existent and manufacturer repair is expensive.
For additional info go to www.avsforum.com and search for "4805 Light Tunnel". You will find threads about the problem as well as fixes. I also posted a DIY replacement option as well:
www.avsforum.com/avs-vb/showthread.php?t=1304694

Sep 06, 2010 | InFocus ScreenPlay 4805 Multimedia...

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

Dark side of screen


the light tunnel has collapsed and needs replacing. the part is inexpensive and relatively easy to replace. if you can get the part from infocus or an authorized service center (part # 306-0095-01), remove the top (4 brass screws and 4 silver screws on the bottom, 2-3 silver screws on the back), next to the lens is the colorwheel. remove the 2 black screws on the colorwheel base, 2 black screws on the metal tunnel frame side, remove the tunnel glass. replace, and reverse the instructions to put it back together.

Aug 15, 2009 | InFocus ScreenPlay 4805 Multimedia...

3 Answers

Problem with my 4805 projector


Yes, you are describing a light tunnel failure and it can be repaired. The parts are available, I just don't have any on hand right now. I will be ordering more this week. The part is about $40.00 plus shipping. The repairs can be challenging if you are not experienced. The color wheel has to be removed to get to the light tunnel The light tunnel is very fragile and easily broken.

Mar 12, 2008 | InFocus ScreenPlay 4805 Multimedia...

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