Question about InFocus ScreenPlay 4805 Multimedia Projector
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.
Posted on Nov 29, 2009
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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Posted on Jan 02, 2017
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