Epson AcuLaser C2600 Service Manual page 127

EPSON AcuLaser C2600/2600
CHARGE / DEVELOPMENT VOLTAGE CONTROL
Purpose
In order to correct the charge voltage and developing voltage so that the density of
a solid image of each color becomes a prescribed level.
Target Values for Control
The values for each color is set according to the following information:
Information on the toner status of use
Information obtained from the relationship between the toner consumption
and the drive time of the developer roller.
Control
Six different developing voltages are used to create six solid color patches
respectively on the transfer belt to detect their density by the Patch Sensor. The
developing voltage for the printer is determined for each color based on the
detected density and the target density. And the charging voltage is also
determined according to the determined developing voltage.
Operating Principle
LASER BEAM POWER CONTROL
Purpose
To determine the laser beam power so that the density of thin lines becomes a
prescribed level.
Target Values for Control
The values for each color is set according to the following information:
Information on the toner status of use
Information obtained from the relationship between the toner consumption
and the drive time of the development roller.
Control
Four different types of laser beam power are used to create four patches
respectively on the transfer belt to detect their density by the Patch Sensor. The
optimum laser beam power for the printer is determined for each color based on
the detected density and the target density.
Control
Revision B
127