Toshiba 4511, 3511 manual Various image forming conditions

15.4 Construction

· Image quality sensor:	Projects the amount of light on the transfer belt and outputs the voltage
	corresponding to the reflected light amount from the transfer belt or the
	toner image on the transfer belt.
· 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.

Image forming process

Transfer belt

Image quality

sensor

Laser optical system
	D/A	A/D

Various image forming conditions

Light source	Reflected light
amount signal	amount signal

CPU

Fig. 15-401

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