Toner Supply From Toner Attraction Pump To Development Unit - Ricoh G133 Service Manual

Toner supply from toner attraction pump to development unit

Each toner attraction pump [A] is driven by the toner transport motor [B]. Each toner
attraction pump has the same mechanism. The pump (toner attraction pump) has the
following components:
Toner supply clutch [C]
Rubber tube
Rotor [D]
The above components attract the toner in the toner transport tube [E] toward the
development unit.
The toner supply clutch controls the rotor, which draws the toner in from the cartridge and
passes it to the development unit. When supplying toner, the clutch turns on and off as
many times as necessary to supply the necessary amount of toner. The amount of toner
depends on the results of toner supply control.
Shutter Mechanism
The development unit and toner attraction pump each have a shutter mechanism. The
shutter [F] on the pump opens when the development unit is placed in the machine. At the
same time, the pump opens the shutter [G] in the development unit. When both shutters
are open, toner can enter the development unit from the toner attraction pump.
The shutter springs pull and close the shutter when the development unit is removed.
SM 6-35
Toner Supply
G133