451 heater sound warming up

[akbareshghi]

my machine sounds high noise when copying the papers i think perheps this is due to warming elements inside the heater unit or wheels and grears of fuser unit
please help me about troubleshooting this problems
thanks a lot

[spanky]

Re: 451 heater sound warming up

A high pitched sound is usually the bearings on the polygon motor.

Run the sim to test this motor.