Ricoh SAVIN D0AP Service Manual page 604

PCDU, Toner Cartridge
Charge, Charge Roller Cleaning, OPC Cleaning
To prevent ozone from being generated, the machine has a charge roller.
The charge roller [A] rotates with the OPC drum [B] to apply an electric charge evenly to the
drum surface. However, if the charge roller is dirty, the applied electric charge becomes uneven.
Therefore, the charge roller is always in contact with the charge cleaning roller [C], which cleans
the charge roller.
The cleaning blade [D] mounted in the PCDU collects any residual toner that remains after
charging. The blade is a counter blade, mounted opposite to the direction of rotation of the drum.
The blade, always in contact with the surface of the drum, scrapes away residual toner. The
removed toner is collected by the toner collection coil [E].
Next, the quenching lamp [F] flashes light onto the OPC drum to remove any residual charge
New PCDU Detection, and Set Detection
When a PCDU is placed in the machine, the ID chip [A] is read. Every time the PCDU is
installed, the machine reads its ID chip [A] to detect whether a new PCDU has been installed. If
you want to continue the present PM count, do SP7-805-001 (Counter Continue: Setting) before
replacing the PCDU with a new unit.
D0AP/D0C4/D0C5/D0C6/M0BQ/M0D1 7-42 SM