Mechanism - Ricoh MP 305 Plus Field Service Manual

Development and Toner Supply
This machine uses a single-roller development system. Two mixing augers mix the developer. The toner
density (TD) sensor and image density (ID) sensor (see the illustration in the PCU section) are used to
control the image density on the copy.

Mechanism

Drive
The main motor [D] drives the development roller [B] and mixing augers [A] through gear [C] and the
development drive shaft.
Developer Mixing
The two mixing augers [C] and [D] keep the developer evenly mixed. Mixing auger 1 [D] transports
excess developer, scraped off the development roller by the doctor blade [B], towards the front of the
machine. Mixing auger 2 [C] returns the excess developer, along with new toner, to the rear of the
mixing assembly. Here the developer is reapplied to the development roller.
The TD sensor [A] detects the density of toner inside the developer.
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