Ricoh P C300W Field Service Manual page 286

7.Detailed Descriptions
ITB Cleaning Unit
The ITB cleaning blade [A] in the cleaning unit removes remaining toner on the image transfer belt after
image transfer to the paper. The toner collection coil [B] moves the collected waste toner to the outlet
for the waste toner bottle.
The ITB cleaning unit has a shutter mechanism at the outlet for the waste toner bottle. When the ITB
unit is removed, the shutter closes the outlet to prevent waste toner from falling.
Paper Transfer Unit
Paper Transfer Bias
The HVPS (High voltage power supply) supplies electricity to the paper transfer roller. The transfer
roller is positively charged. The right end of the transfer unit is attached to the terminal from the HVPS
when you close the front cover.
Paper Transfer and Discharge
274