Hi ,I have" repaired "the tunnel in my 4805 and although somewhat better[you are right ,they are ridiculous to try to glue] it will still need replacement.Can I buy this part and possibly the clip as well from you? If so what payment form do you prefer? thank-you ......Jim Bouwman
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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
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.
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.
You will see once you've taken out the light tunnel ( also known as the packlight pipe module ) that there is one or two of the small mirrors that has come loose as a result of the lamp's heat.
Glue them back with Super Glue that dries very fast.
Do them one by one , always try to build them back in from edge to edge i.e. - If the top one and left side one is loose , do the side one first and then the top one - just makes it easier.
Remember you only have one shot at this , so do it carefully.
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
Thanks for contacting us regarding your product questions or concerns. It appears you are wanting to know how to reach the glass prism from your 4805?
My initial question would be, why are you looking to access the glass prism in your 4805? This is a very dilicate process internally of your projector which helps it opperate. Are you trying to self-repair your projector?