Ricoh FT4430 Service Manual page 80

DRIVE MECHANISM
The main chain [A] drives the cleaning unit when the main motor is on. The
brush gear [B] is fitted into the cleaning drive sprocket [C]. A pin on the
inside of the sprocket drives an allen screw [D] on the shaft of the gear,
turning the gear. The brush gear drives the coil gear [E] directly, and the
toner in the unit is transported to the used toner bottle by the toner collection
coil [F].
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16 April '88