Ricoh M156, Обучение по обслуживанию

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60
Rm-MF1/Rm-P1 Training
Slide 60
Transfer Roller Cleaning

Toner may transfer to the roller surface following a paper
jam, or if the paper is smaller than the image. Periodic
cleaning of the roller is required to prevent this toner from
migrating back to the rear of new printouts.

The roller is cleaned automatically at the following times:

After initial power on

After clearing of a copy jam

At job end (if at least 10 sheets have been printed since last
cleaning)

To clean the roller, the PSU does the following:

Supplies negative cleaning current (about -4uA) to the
transfer roller, causing negatively charged toner on the
roller to move back to the drum.

Supplies positive cleaning current (+5uA) to the roller,
causing any positively charged toner to migrate back to the
drum.
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