Question about InFocus ScreenPlay 4805 Multimedia Projector

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Cleaning the fan

I need to be able to open the case of my projector so that I can clean the dust etc. before I fit a new bulb.

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This could be tricky if you are not technically inclined remove the screw on the bottom of the projector four smaller size and four bigger size and 2 at the bottom near the connectors remove the lamp cover and the lamp itself then remove the focus ring and zoom ring then lift the cover from below near the lens slowly take care not to damage the plastic lock underneath it take sometime but be patient you are almost there hope this be of help cheers

Posted on Feb 09, 2009


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My Acer Projector shows white and black spots. I am almost unable to see anything anymore. I read that changing the lamp in similar issue does not help. The dead pixels are multipling. Any easy solution? I...

if not the lamp then definately got dust issues. usually dust makes picture go red shade.

if you have this issue then probably need new projector, if this being the case a little brute force to try and open may sound sensibly option. worth a go

I now buy hitachi with 3 year bulb warrenty for our school as cheaper in long run.

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are you sure its not the fan?
I supose its good to clean the fan and the inside ones a year.
dust gets in there.

The fan could be failing.

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Its displays a filter warning on my projector. Model # LC-XBL20. How do I get rid of it???

The projector needs a very powerful bulb to make the light.That bulb uses a lot of power so it heats up very much. To stop the heat from doing damage to the other components a fan is used to blow air over the bulb and it reflector. Because the dust in the air would ruin the reflector a filter is used over the fan - in your case that filter is clogged and needs to be cleaned or replaced. How this is done is explained in detail in the user manual. If you no longer have the manual get it from here
For a new filter you will have to order it from Eiki directly.

Aug 19, 2011 | Computers & Internet

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My optoma hd70 projector which is 4 years hold has worked perfectly. However when I switch it on it works for a few minutes, then the screen turns various colours, it makes a funny noice and then switches...

The color wheel sensor needs good cleaning. an optical lens cleaning liquid might help. also clean the fans and vents if you open it. I had to remove the sensor and clean. then it worked.

Jul 01, 2011 | Optoma HD70 DLP Projector

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New bulb, fan working, after 10 mins of operation get posterized image; suspect overheating; dust has been cleaned out; has not been taken apart

Is the projector placed in a box or an area where it could generate overheating? Is this projector still within warranty?
Please feel free to update me. Cheers!

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A light is blinking red "TEMP"

Open the bulb replacement door, pull out the filter and spray it with dust off. (compressed air) Check the fan, clean it out as well. Should be fine after that. if you need further help, post a comment and i will help some more.

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It sounds like it is overheating. Are the fans all working? If so, try opening the casing and blowing all the dust out with a can of air from Staples/Office Depot. If the fans aren't working you may need to replace them.

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Open the back case (about 10 screws) and clean the lamp cooling fan. This is NOT the one you can see from the outside. It is located in a horizontal position above the lamp area from the rear. A DRY toothbrush can be used to brush out the dust. Keep a vacuum nozzle next to it while cleaning so the dust does not go inside. Some say to use compressed air to blow out the dust, but vacuuming it keeps better control and can prevent unwanted dust from moving down into the optics.

I learned this the hard way when replacement lamp burnt out in one week. I thought the cooling fan that you can see from the outside (it actually is the exhaust fan) was the only fan. The lamp cooling fan sucks in cool air and puts it right down onto the lamp.

Test the fans by turning on unit without lamp installed (the fans will power on for a short period of time and you can see them function to verify airflow). Clean this fan once a year as the dust will be back.

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