Ricoh MP C2504 User Manual

The Process Control Procedure
The potential of the unexposed drum is called the electrified potential (Vd), whereas the potential when
toner starts to adhere to the drum is called the development bias (Vb).
Toner starts to adhere to the drum in proportion to the potential when the value of potential becomes
more than Vb. The value (coefficient) which shows the relation between the potential and the amount of
adhesion is called development gamma.
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 figure for the toner density in the developer is called Vref.
Process control is done as shown in the following chart, which includes development gamma
determination, Vref correction, and LD power control.
Process Control
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Ricoh MP C2504 Specifications

General

Print Technology	Laser
Functions	Print, Copy, Scan, Fax
Print Resolution	1200 x 1200 dpi
Scan Type	Flatbed, ADF
Max Scan Resolution	600 x 600 dpi
Copy Resolution	600 x 600 dpi
Max Paper Size	A3
Duplex Printing	Yes
Memory (RAM)	2 GB
Print Speed	25 ppm (A4)
Copy Speed	25 cpm (A4)
Fax Resolution	200 x 200 dpi
Paper Capacity	1200 sheets
Connectivity	USB, Ethernet, Wi-Fi
Dimensions	587 x 685 x 913 mm
Control Panel	9-inch Smart Operation Panel