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AIDC Sensor Main Unit Theory of Operation
2-66
II Composition/Operation
B. Complete correction control
1. The offset voltage of the AIDC Sensor is calculated.
2. A complete detection pattern of each color of toner is produced on the surface of the
Transfer Belt.
3. The LED is illuminated with each of the specified intensity values and the output value
for each LED intensity value is detected using the AIDC Sensor.
4. The intensity setting value is calculated from the output value detected.
11.2.3 AIDC Sensor shutter mechanism
• Since the AIDC Sensor is installed below the Transfer Belt, it can be dirtied with toner or
other foreign matter. A shutter mechanism is therefore provided above the AIDC Sensor
to prevent it from being dirtied.
• The shutter is opened or closed in synchronism with the pressure or retraction motion of
the 2nd Transfer Roller. When the 2nd Transfer Roller is pressed, the Pressure Cam
pushes up the Sensor Lever, which opens the shutter above the AIDC Sensor.
• When the 2nd Transfer Roller is released, the shutter above the AIDC Sensor is closed
by the tension of a spring.
Start
Calculate the offset voltage.
Check the output value based on
the specified intensity value.
Calculate the set intensity value
using the output value detected.
End
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Shutter
Pressure Cam
Pressure Cam
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