Question about InFocus IN26 Multimedia Projector

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Infocus in26 fan runs continually

After power down, the fan runs until the light is solid which indicates the bulb is cool. However the fan never stops. Continuous humming.

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Hello,
The fan does run continuously on this projector however it should be running very very slow when the projector has completed it's lamp cool down routine.
The reason for this is that a portion of the switching power supply remains energized (running) when the projector is at rest. But as I mentioned it should run very slow in this state. If it remains running full blast then most likely the fan speed control chip is shorted which can cause fail 2 ways, either the fan 1. runs full
speed or 2. remains stalled (then the projector will go over-temp and shut itself down) I hope this answers you question.

Cheers

Posted on Dec 30, 2009

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