Overview; Development - Ricoh B121 Service Manual

6.9 DEVELOPMENT

6.9.1 OVERVIEW

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The development unit consists of the following parts.
1. Development roller
2. Mixing auger 2
3. TD sensor
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.
B121 Series/B259 Series
B121D942.WMF
4. Mixing auger 1
5. Doctor blade
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DEVELOPMENT
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SM