Ricoh MP C307 User Manual

Process Control and MUSIC
566
Trigger Operative Condition Notes
Control
Toner End
Recovery
When a Toner End is resolved. -
Initial Setting When an initial developer setting is completed. -
Vc is the charge bias, which is applied to the charge rollers.
Vd is the potential of the unexposed (charged) drum.
The value of Vc is not equal to Vd.
For example, if applying a Vc of 700 [-V], the actual drum potential (Vd) tends to be about 650 [-V].
Vb is the potential when toner starts to stick to the drum (Development bias).
When the potential gets to Vb or greater, toner starts to stick to the drum in proportion to the potential.
Development gamma is the coefficient showing the relation between the potential and the volume of toner
adhesion.
In addition to the development gamma and the potential, the toner density in the developer needs to be
controlled. This is done to maintain the proper toner density (the amount of toner adhesion).
The target for the toner density in the developer is when the output from the toner density sensor is Vtref.
Process Control is done as shown in the following chart, which includes development gamma determination,
Vtref correction, and LD power control.

Ricoh MP C307 Specifications

General

Type	Multifunction Printer
Functions	Print, Copy, Scan, Fax
Print Technology	Laser
Print Resolution	1200 x 1200 dpi
Maximum Paper Size	A4
Duplex Printing	Yes
Scan Resolution	600 x 600 dpi
Mobile Printing	Apple AirPrint, Google Cloud Print, Mopria
Operating Systems Supported	Windows, Mac OS, Linux
Print Speed (Black)	30 ppm
Print Speed (Color)	30 ppm
Standard Paper Capacity	350 sheets
Supported Paper Sizes	A4, A5, A6, B5, B6, Letter, Legal
Scanner Type	Flatbed with ADF (Automatic Document Feeder)
Copier Speed (Black)	30 cpm
Copier Speed (Color)	30 cpm
Copy Resolution	Up to 600 dpi
Zoom Range	25% to 400%
Connectivity	Ethernet, USB
Max. Paper Capacity	1, 350 sheets
Display	10.1-inch color touchscreen