Ricoh SP 330SFN, Service Manual, Page: 276 / 333

Image Transfer
M0C3/M0C4/M0C5/M0C6/M0C7 7-34 SM
7.9.2 MECHANISM
Transfer/Separation
The transfer roller is pressed against the OPC drum. The HVP supplies a positive current to the
transfer roller, attracting the toner from the drum onto the paper. The current is set in
accordance with the paper's type, size, and feed tray.
Separation of the paper from the drum is aided by the drum's own curvature and by a high AC
voltage applied to the discharge plate.
You can adjust the transfer current levels with “Trans. Roller Bias” in the SP Mode (Engine
Maintenance). When increasing a transfer current level, use caution:
•
Increasing a transfer current level may produce ghost images–some part of the image
near the leading edge reappears in another part of the page.
•
Increasing a transfer current level might damage the OPC drum.
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 machine cleans the roller at the following times:
•
At the end of a job, if at least 10 sheets have been printed since the last cleaning
•
After initial power on