Ricoh SP 330SFN, Service Manual, Page: 267 / 333

Print Cartridge (AIO)
SM 7-25 M0C3/M0C4/M0C5/M0C6/M0C7
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Toner Supply and Development
No. Item
1. Scraper
2. Toner tank
3. Agitator
4.
Toner detection feeler
5. Toner supply roller
6. Drum
7. Development roller
Toner Supply:
The agitator mixes toner and sends it to the toner supply roller and development roller.
Toner End:
The toner detection feeler [4] detects toner end. The toner end sensor is on the outside of the
development unit.
Development Unit:
This machine uses a one-roller development system. The high voltage supply applies
approximately -300V to the development roller.
This machine does not use a TD sensor or ID sensor to control toner density. The scraper
controls the toner density.