1St Image Transfer Roller Control - Konica Minolta BizHub C360 Service Manual

Theory of Operation Ver. 1.0 Jul. 2009
13.3.2

1st image transfer roller control

• Pressure mechanism is equipped for pressing the 1st image transfer rollers (Y, M, C) to
inside the transfer belt at the 1st image tansfer.
• The 1st image transfer roller (K) does not have pressure retraction mechanism. The 1st
image transfer roller (K) always presses the transfer belt to the PC drum (K).
• The driving force of the fusing motor is transmitted to the fusing drive release gear and
transfer belt retraction clutch, thereby pressing the 1st image transfer roller. The fusing
drive release gear is moved to the drive coupling position when the right door is closed,
so that the driving force can be transmitted. For more details of the fusing drive release
mechanism, see "Fusing section".
• The transfer belt retraction sensor is installed to detect retracting position of the 1st
image transfer roller.
A. 1st image transfer roller pressure
• Rotation of the fusing motor is transmitted to the transfer belt retraction clutch via the fus-
ing drive release gear.
• When the transfer belt retraction clutch is turned ON, the rotation of the fusing motor is
transmitted to the drive gear.
• Rotation of the drive gear rotates the pressure cam, so that the position of contact
between the slide plate and the cam is varied.
• The 1st image transfer roller pressure spring provided for the slide plate causes the slide
plate to move to the pressure position (toward the transfer belt driven roller side).
• The movement of the slide plate results in the 1st image transfer roller drive arm being
rotated. The rotation of the 1st image transfer roller drive arm lowers the 1st image trans-
fer roller (Y, M, C), so that the transfer belt is pressed against the PC drum.
• When the slide plate moves to the pressure position, the leading edge of the slide plate
pushes the actuator of the transfer belt retraction sensor.
• The actuator blocks the transfer belt retraction sensor and the slide plate movement is
detected.
• The transfer belt retraction clutch is turned OFF.
• The cam will stop rotating and the siding plate will stop.
• The 1st image transfer roller (Y, M, and C) will stay being pressed.
1st image transfer roller/Y
drive arm (retraction position)
1st image transfer
roller/Y (retraction
position)
Transfer belt
(pressure position)
1st image transfer roller/Y
(pressure position)
1st image transfer roller/Y
drive arm (pressure position)
1st image transfer roller/C
(retraction position)
Slide plate
(pressure position)
Transfer belt
(retraction
position)
13. 1ST IMAGE TRANSFER SECTION
1st image transfer roller/C
drive arm (retraction position)
Pressure cam
(retraction
position)
Pressure
cam
(pressure
position)
1st image transfer roller/K
(always press)
1st image transfer roller/C
drive arm (pressure position)
1st image transfer roller/C
(pressure position)
Transfer belt
retraction
clutch (CL5)
Slide plate
(retraction
position)
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