Interleaf EP5000/EP4000 GENERAL, MECHANICAL/ELECTRICAL
97.04.01
M-12
1149SBM0701A
7-1. AlDC Sensor
To provide image stabilization control, this copier has AlDC Sensor PWB-G fitted to
the Cleaning Unit of the Imaging Unit. The sensor is used to detect the toner density
and background level on the PC Drum.
Operation
1: The PWB-G LED projects approx. 950-nm infrared light onto the surface of the PC
Drum.
2: The PWB-G phototransistor detects the amount of light reflected back.
3: The phototransistor outputs a voltage corresponding to the intensity of the light
reflected back.
Output
GND
LED Power
Supply
PC Drum
AIDC Sensor
Image Transfer/Paper Separation Coronas
1149M005AA
Toner Density on PC Drum
Light reflected
Output Voltage
High
Small
High
Low
Large
Low
