Drive - Ricoh B121 Service Manual

6.9.2 DRIVE

The main motor [A] drives the
development roller [B] and mixing
augers [C] through a train of gears
and the development drive shaft
[D]. When the PCU is pushed in,
the development drive shaft
engages the development roller
gear.
The development drive gears
(except for the gears in the
development unit) are helical
gears. These gears are quieter
than normal gears.
6.9.3 DEVELOPER MIXING
The two mixing augers, [E, F]
keep the developer evenly mixed.
Mixing auger 2 [E] transports
excess developer, scraped off the
development roller [G] by the
doctor blade [H], towards the front
of the machine. Mixing auger 1 [F]
returns the excess developer,
along with new toner, to the rear
of the mixing assembly. Here the
developer is reapplied to the
development roller.
SM
[B]
[C]
[H]
[F]
[F]
6-39
DEVELOPMENT
[D]
B121D943.WMF
[G]
[E]
[E]
B121D944.WMF
B121 Series/B259 Series
[A]