The Buffer Pass Unit's Fan is Noisy
You can change the buffer pass unit fan activation setting according to the type of paper and operating environment (ambient temperature).
Use 0303-01: [Buffer Pass Unit Fan Activation Setting] in Adjustment Settings for Operators to set the fan on or off.
Depending on the setting, blocking, whereby toner particles on stacked copies form clumps, may cause the print image to detach. If this happens, set the fan to on.