Samsung DLP vibration sound

[jbow]

I replaced the color wheel in my 3 1/2 year old HLR4667W with no problems. The replacement part (L3 chassis) was the BP96-00674A. It ran fine for about a month, at which time the 'zzzzzz' sound on shutdown began again. After another couple of weeks, the 'zzzzzz' sound remained at all times the set was on - just as it had with the original color wheel. I replaced that color wheel with a second new one, with similar results - the sound is continuous while the set is powered on, and sounds very much like a mechanical vibration. I also replaced the lamp with the Samsung specified replacement, purchased from J&J International.

On the assumption that getting two defective new color wheels was unlikely, I began looking for some mechanical reason for the vibration sound. I noted that a slight pressure on the lamp housing, which in turn puts a slight pressure on the color wheel cover, will cause the vibration sound to stop while that pressure is being applied. I also noted there is a slight gap - no more than 1/32 inch - between the color wheel cover and color wheel housing when assembled. I don't know if that gap should be there, or if it might be the cause of the vibration. Try as I might, I can't get the gap to close.

The picture is great, and there are no problems other than the 'zzzzzzzz' sound. Should I consider a new CW housing and/or cover? What about the fans? Any thoughts and/or suggestions you might have would be greatly appreciated.

Thanks in advance for your help -

[CoachMike]

Check to see if you have installed the spacer when you installed your color wheel. The gap you are describing sounds like the area that the Black rubber form fitted spacer goes ?? It fits around the entire edge of the color wheel housing and when installed correctly fits snuggly down onto the base of the light engine area like a gasket for a water pump ?? Hope this works.

[jbow]