Ricoh SP 200 Specifications download pdf (Page 75)

6.3 ROLLER CLEANING

If the paper size is smaller than the printed image, or if a paper jam occurs

during printing, toner may be transferred to the roller surface. To prevent this

toner from transferring to the back side of copies, the transfer roller has to be

cleaned before the next printing run.

During transfer roller cleaning, the power pack supplies a negative cleaning

bias (- 4 µA) to the transfer roller. So, any negatively charged toner on the

transfer roller is then transferred back to the drum. Then a positive cleaning

bias of +10 µA is applied to transfer back to the drum any toner which was

positively charged by the transfer roller.

The machine goes through the cleaning mode in the following conditions:

•

After a copy job has been finished.

•

At the same time as power on.

•

After a printer jam has been cleared.

Also, transfer roller cleaning can be done forcibly by SP2-910.

A193D531.wmf

IMAGE TRANSFER AND PAPER SEPARATION 1 August 1996

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Ricoh SP 200 Specifications Page 75