Question about InFocus ScreenPlay 4805 Multimedia Projector

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My projector is making loud buzzing noises that arent normal.. I just ceiling mounted my projector its an InFocus ScreenPlay 4805 and the bulb has 1500 hours on it. The buzz started after it was on for 30 minutes while watching a movie... any advice on getting it to start... Its extremely loud and not just the normal fan sound...

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If this sound you are describing is NOT constant and is intermittent in nature it is certainly not a color wheel problem. This sound is usually caused by failure of the Lamp cooling fan (the large one)'s Mos-Fet driver chip. Located on the bottom of the main board. These surface mount "chips" do fail and it's a fairly common problem however this is usually (but not always) accompanied by the projector shutting itself down after a few minuets or so as the high temp switch trips off. A color wheel common failure presents in two ways, either all the glass color filters fly off (there are six) and the image is monochrome (black and white) or just one or more of the segments has come off and the result is an imbalance of the color wheel which spins VERY fast resulting in a vibration
that is constant and can easily be felt by placing your hand on the projector. And all of these problems are very easy to repair.

Good Luck!

SagerTronics

Posted on Nov 29, 2009

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Mine too; started ages ago, just on startup for a minute or two; but as of last night, it's constant and pretty much unbearable. Other posts would seem to indicate it's the color wheel. Has anyone successfully replaced theirs?

Posted on Nov 25, 2009

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1 Answer

It makes a wierd noise


The bulb housing has come loose...

When the bulb heats up & cools in normal use, the housing will contract and become loose.

Unplug and re-seat the bulb and housing ...

Another possibility: If the replaced bulb shattered in the projector, there may be debris in the fan... use compressed air ($8/can RadioShack) to clean out (make sure the projector / bulb are cool before using compressed air.

Hope this helps!

Sep 09, 2009 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

I have a InFocus ScreenPlay 4805. the motor that


it is the colorwheel and the part number is 525-0146-00. call any infocus authorized service center (find one in your area on their website).

May 01, 2009 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

No pwer to Infocus sp 4805


My 4805 made a loud pop noise and smoke and died.

I thought it the bulb and wasted $340 on that purchase.

They are subject to overheating and the main circuit board may be fried.
It cost me $50 for a tech to confirm my suspicons of the same.

Look at the main circuit board and you might idenify a scorched
overheated area.. My shop told me you can purchase a new main
board.. Diagnosed by no power to the bulb...



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

1 Answer

Projector stays on for 3 minutes then turns itself off


Hi Chipped Rice

The loud buzzing noise you heard was the colourwheel that gave in.

Now what happens is , the machine will turn on and go through the whole cycle and as soon as the colourwheel is supposed to start doing it's stuff the Projector will switch off because there is no response from the coulourwheel itself.

You will have to replace the colourwheel unfortunately as it cannot be fixed.

Thanks for using Fixya !

May 27, 2008 | InFocus ScreenPlay 4805 Multimedia...

2 Answers

Infocus SP4805 buzzing noise


Hi dcabbarno

The buzzing noise is a broken colourwheel and the shadow could be a part of the colourwheel that is obstructing the light engine or it could be your packlight pipe ( tunnel with 4 tiny mirrors in it ) that was damaged when the colourwheel broke.

I do unfortunately not have the part numbers of the parts that I mentioned , but you could assist by opening up the unit and supplying me with the part numbers.

The colourwheel you will spot straight away once you've taken off the top cover of the Projector , the packlight pipe is situated right next to it - looks like a small tunnel that's got 4 mirrors inside it - takes the light into the light engine.

Once you've supplied me with these I can get you prices and places to order it from and will help you with instructins on how to replace them - it is quite easy to DIY.

Thanks for using Fixya !

May 14, 2008 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

INFOCUS Screenplay LCD projector...


Hi there

I take it the Projector is ceiling mounted ?

If this is the case check that it is installed with the lens of the Projector in the facing straight to the middle of the screen or try adjusting the bracket's swivel head to move it a bit - should do the trick !

May 10, 2008 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

Loud noise


It's probably the colorwheel not the fan, can only be fixed by replacement.

Dec 05, 2007 | InFocus ScreenPlay 4805 Multimedia...

2 Answers

Horrible noise


it is the color wheel i have a similar problem and am looking for the part, the color wheel is a small electric motor that spins at a high speed and it can go bad. which will lead to the horrible squeel/hum/buzz.

Apr 24, 2007 | InFocus ScreenPlay 4805 Multimedia...

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