If it is new, return/exchange it. You will void the warranty by taking it apart, and you won't fix a gear/roller without dismantling it.
Probably the fan(s), look for the exhaust port and spray with compressed air.
I have a new WorkCentre 3225 that makes a short whirring noise about every 30 min. Any way to dissable that/what is it?
I have the unit going int'o power saving mode at 1 minuite.
Everything functions normaly.
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