e-STUDIO281c/351c/451c © 2005 - 2008 TOSHIBA TEC CORPORATION All rights reserved
IMAGE QUALITY CONTROL
15 - 4
15.4 Construction
Image quality sensor: Projects the amount of light on the transfer belt and outputs the voltage
(S17) corresponding to the reflected light amount from the transfer belt or the toner
image on the transfer belt.
Image quality sensor: Projects the amount of light on the transfer belt and outputs the voltage
D/A converter: Converts light source amount signal into the voltage to the sensor.
Laser optical system: Performs test pattern exposure (for toner image formation).
A/D converter: Converts the output voltage from the sensor into digital values and outputs
them to the CPU.
Image forming process: Performs charging, laser exposing and developing processes.
CPU: Performs steps [1] to [10] described previously.
Fig. 15-2
CPU
Image forming process
y
Laser optical system
A/D
D/A
Transfer belt
Image quality
sensor
Reflected light
amount signal
Light source
amount signal
Various image forming
conditions
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