Idc Sensor Shutter Mechanism - Olivetti d-Color 201MF Theory Of Operation

14. Transfer corona section
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.
2nd image transfer roller
Retracted
Pressed
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.
Shutter
IDC registration sensor/ YC
(IDCS/MK)
IDC registration sensor/ CK
(IDCS/MK)
Shutter
When pressed
Pressure lever
When sensor shutter is closed
64
Shutter
Open
Closed
2nd image transfer retraction motor (M5)
Cam
4038T2C169AA
4038T2C108AA
Theory of Operation
Theory of Operation Ver. 1.0 Sep. 2008
Spring
Pressure lever
Cam
Shutter
4038T2C204AA
When retracted
4038T2C170AA
When sensor shutter is open
4038T2C107AA
Y109670-2