2Nd Image Transfer Roller Pressure Mechanism - Develop QC 2235 Plus Service Manual

QC 2235plus Theory of Operation Ver.1.0 Mar. 2004
10.3.3

2nd Image Transfer Roller pressure mechanism

• The machine is provided with a mechanism that presses the 2nd Image Transfer Roller
up against, and retracts it from, the Transfer Belt to prevent the 2nd Image Transfer Roller
from being dirtied due to patterns produced for purposes other than an actual copying
operation, which may be a pattern produced during the image stabilization sequence or
other function.
A. Pressure/retraction operation
1. Drive from the 2nd Image Transfer Pressure/Retraction Motor is transmitted through a
gear train to the drive gear.
2. The rotation of the drive gear turns the pressure cam a half turn, which pushes down
the Pressure Lever. This causes the 2nd Image Transfer Roller to be pressed up
against the Transfer Belt.
3. At this time, the 2nd Image Transfer Pressure/Retraction Sensor detects whether the
2nd Image Transfer Roller is located at the pressure position.
4. When the motor is energized a second time, the pressure cam turns another half turn.
This releases the Pressure Lever, which moves the 2nd Image Transfer Roller to, and
stops it at, the retracted position.
2nd Image Transfer Pressure/Retraction
Sensor (PC29)
2nd Image Transfer
Roller
When Retracted
Drive Roller
2nd Image
Transfer Roller
Cam
2nd Image Transfer Pressure/
Retraction Motor (M13)
Cam
When Pressed
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2-39
Transfer Corona section
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