Toner Supply Control; Developer Initial Setting - Ricoh MP C2504 Field Service Manual

7. Detailed Descriptions
Change the SP setting to [Fixed]. LD strength is fixed with SP2-221-001 to 004.
• To control LD Power by Process Control (Default)
• The LD power is determined by process control.
• The LD strength is adjusted based on a table which is determined by the Development Bias
Control and Vref Correction.

Toner Supply Control

The Toner Supply Type can be selected with SP3-400-001 to 004 (Toner Supply Type).
• 0: Fixed (Fixed supply method)
The toner supply time is calculated based on the supply rate of SP3-440-001 to 004 (Fixed
Supply Mode: Fixed Rate).
• 2: PID (Proportion Integral Differential)
The amount of toner supply is calculated based on the pixel information and TD sensor information.
• 4: DANC (Divided Active Noise Control) (Default)
Conventional PID method + active noise control. It controls the timing to supply the developer to
minimize uneven developer density in the development unit.

Developer Initial Setting

When a new PCDU is set in the machine, the machine automatically detects it and enters the developer
initial setting mode. The machine then detects the
developer initial setting is done as follows.
1. Starting the developer initial setting mode
The new unit detection mechanism triggers the developer initial setting mode.
2. Agitating the developer
The machine rotates the development roller and transport coil to agitate the developer for 30
seconds.
3. Detecting the
While agitating the developer, the machine detects the output from the TD sensor, and stores this
output as the initial
4. Calculating Vt
The machine calculates Vt using the difference of the current
count through SP.
1126
count (Initial value)
count.
count which is an output from the TD sensor. The
count while referring to the initial