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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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.


Posted on Dec 30, 2009


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Projector will shut off after 15 min of use and won't restart till cool down fan is on and running

If this is one of the first IN26's made, this could be a lamp issue. Take the lamp out and look at the side that is closest to the underside of the of the top cover when installed. There should be foil tape covering the seams on the lamp. If not then heat is escaping from the seams and causing the thermal sensor to shut the projector down prematurely. This can be fixed by applying foil tape over the seams. If the lamp is already taped, then it could be a problem with the main board and will have to be fixed by a technician.

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