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Main Unit Theory of Operation 1st Transfer Section
2-43
II Composition/Operation
G. Retraction position control
• The pressure and retraction operation of the 1st Transfer Roller is controlled as the
Retraction Position Sensor/1st Image Transfer (PC9) detects the movement of the Slid-
ing Plate.
1. The Pressure/Retraction Clutch/1st Image Transfer (CL4) is energized.
2. The Sliding Plate is moved to retract the 1st Transfer Rollers from the Transfer Belt. As
a result, the Retraction Position Sensor/1st Image Transfer (PC9), which has been
blocked, is now unblocked.
3. After the lapse of a predetermined period of time after the Retraction Position Sensor/
1st Image Transfer (PC9) has been unblocked, the Pressure/Retraction Clutch/1st
Image Transfer (CL4) is de-energized.
H. Pressure/retraction operation timing
4138to2046c1
Sliding Plate
Retraction Position Sensor/1st Image Transfer
4138to2046c2
1st Image Transfer Roller retracted
1st Image Transfer Roller pressed
Retraction Position Sensor/
1st Image Transfer (PC9) blocked
Retraction Position Sensor/
1st Image Transfer (PC9) unblocked
Pressure Cam angle
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