Question about Philips ProScreen 4750 Impact Multimedia Projector

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Fan not running

Hi
The fan has stopped running therefore overheats and cuts out.I am have dififculty getting into the projector what type of screws/fixings are in the base and is there a fuse for the fan

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  • Michael Jochum Jan 06, 2009

    does the green and red light blink together and then it shuts off and starts back up again ?

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Dear Sir,

I am willing to buy over your Philip4750

pls contact me at the soonest master300p@hotmail.com

regards
Mr Cheong

Posted on Mar 04, 2009

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Typically when electronic devices just shut themselves off it's due to some type of overload, the most common are thermal and current. If you can power it back on again after the device has set for a while it's generally thermal overload (device is getting too hot) because if it was current overload you would have to change some type of fuse or reset some type of breaker. Has the fan stopped operating? Next time you power it up, keep a close eye on it. If it doesn't run at all or if it stops during operation theres probably something mechanically wrong with the fan. If it runs the entire time it may not be running fast enough the venting ports could be clogged with debris. If youre technical enough you could take it apart and blow out all the venting ports including the fan (if you do this BE SURE TO BLOCK THE FAN WHILE BLOWING AIR THROUGH IT, IF YOU DON'T YOU RUN THE CHANCE OF RUINING THE BEARING IN THE FAN AND THEN YOU'LL HAVE TO REPLACE THE FAN!!!) also a lot of these small venting fans have a small oil port for them, it's usually a sticker that says oil on the center of the fan. Use a light weight oil, just a small drop or two and it's generally a good idea to try and get it running before sealing it up just so you don't fling oil all over the inside of the case and on boards but be careful not to touch any of the circuitry and don't leave it powered on too long, just enough for the fan to get to operating speed and make sure it's not leaking oil, if you run it for too long with the fan off you could overheat the circuitry and damage something and make a bigger problem. hope this helps :)

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hi,
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hi,
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1 Answer

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If you take off the top cover of the Projector and follow the cables from your fans to the Mainboard - you'll find a smallish board that regulates the heat of the Projector. You will also find another sensor on top of the lamp housing.

Try replacing the sensor that goes with the fans first , this is normally the one giving problems.

Good luck and thanks for using Fixya !

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