Aidc Sensor Shutter Mechanism - Develop QC 2235 Plus Service Manual

Transfer Corona section
• Operation Timing
Main Motor (M1)
2nd Image Transfer Pressure/
Retraction Motor (M13)
2nd Image Transfer Pressure/
Retraction Sensor (PC29)
10.3.4

AIDC Sensor Shutter mechanism

• The AIDC Sensor can be contaminated with toner since it is located under the Transfer
Belt. There is a shutter mechanism provided for the sensor to prevent it from being con-
taminated.
• The shutter opens and closes in synchronism with the pressure and retraction motion of
the 2nd Image Transfer Roller. When the 2nd Image Transfer Roller is retracted from the
Transfer Belt, the Pressure Pin pushes the Shutter Holder. This moves the Shutter at the
AIDC Sensor to the front side.
• When the 2nd Image Transfer Roller is pressed against the Transfer Belt, on the other
hand, the Shutter of the AIDC Sensor is moved by a spring force to the rear side and
closed.
2nd Image Transfer Roller
Retracted
Pressed
AIDC Sensor/2
(PC9)
Shutter
AIDC Sensor/1 (PC8)
When Sensor Shutter is Closed
QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
Start Key ON Paper moves past 2nd Image Transfer Roller
Shutter
Open
Closed
2nd Image Transfer Pressure/
Retraction Motor (M13)
4036ma2171c0
4036ma2540c0
2-40
Shutter Holder
When Sensor Shutter is Open
4036ma2541c0
4036ma2170c0
Pressure
Pin
4036ma2172c0