Clean the paper transport rollers and guide plates in the buffer pass unit.
Pull out the buffer pass unit and open the guide plates.
Wipe the rubber rollers for the transport rollers with a slightly damp cloth.
There are twenty-four rubber rollers for the twelve transport rollers.
Wipe the guide plates (especially the ridgelines of the bends and the cut-and-bent portions) with a cloth moistened with alcohol.
Close the guide plates and push the buffer pass unit back into the machine.