Question about InFocus ScreenPlay 4805 Multimedia Projector
Occasionally the projector starts up with a squealing noise. Suspect bearing in the colour wheel.Does anyone else ever had a problem with this?Am I barking up the wrong tree ? PS :It is not the fan.
thanks Peter.(Apprentice idiot)
It is the colorwheel bearings going slowly due to excessive dust and heat. remove the lamp and push in the switch actuator on the lamp door frame. turn the projector on and see the colorwheel spin in the lamp housing window. does the noise happen when the wheel spins and stops when the wheel stops? let the switch actuator go. does the noise stop? it's the colorwheel (pn: 525-0146-00). you can get it through an infocus service center. try av solutions in ny. www.avsolutionsny.com
Posted on Dec 01, 2009
No it's not the fan but it is most likely the fan driver chip is failing and is pwm driver and when it can no longer supply sufficient current it will cause the field coils of the fan to make a squealing sound and almost assuredly the fan is not spinning fast enough to provide proper cooling.
Also if the color wheel bearings were so bad that they are "squealing" the color wheel would never be able to spin up to phase lock, which in turn would inhibit the projector's lamp from striking.
Posted on Nov 29, 2009
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Posted on Jan 02, 2017
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