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14. Transfer corona section
Theory of Operation Ver. 1.0 Sep. 2008
64
bizhub C200
Composition/Operation
14.3.4
IDC sensor shutter mechanism
• The IDC 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 contami-
nated.
• The shutter opens and closes in synchronism with the pressure and retraction motion of
the 2nd image transfer roller.
• The cam will press the pressure lever to open the shutter on the IDC sensor during
retraction.
A. Shutter open/close operation
1.
Drive from the 2nd image transfer retraction motor is transmitted through a gear
train to the cam.
2.
The cam rotated from the pressure position pushes down the pressure lever at the
retraction position, causing the shutter to open.
3.
The cam rotated from the retraction position releases the pressure lever at the
pressure position, causing the shutter to close.
2nd image transfer roller
Shutter
Retracted
Open
Pressed
Closed
4038T2C204AA
4038T2C169AA
4038T2C108AA
4038T2C107AA
2nd image transfer retraction motor (M5)
IDC registration sensor/ YC
(IDCS/MK)
Shutter
IDC registration sensor/ CK
(IDCS/MK)
When sensor shutter is closed
4038T2C170AA
When sensor shutter is open
Pressure lever
Shutter
Shutter
When retracted
When pressed
Cam
Pressure lever
Spring
Cam
Theory of Operation Y109670-2