Question about Alpine Air XL-15 Air Purifier
I have noticed that the fan motor sounds like it is changing speed on its own. What would be causing this?
The control component or the control circuit for the fan can be causing the speed variation, or the bearings on the thing can be wearing (or contaminated) with the same result. If you can make a test bench, look (feel with a test pad, really) for drive transistors that get hotter than they should or an inconstant power resistor or shunt.
Posted on Jun 23, 2008
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Posted on Jan 02, 2017
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