Konica Minolta bizhub C658 Service Manual page 1826

bizhub C658/C558/C458/C368/C308/C258
[5] Transfer belt drive roller
7.3 Operation
7.3.1 Transfer belt drive
• The transfer belt drive roller is rotated by the driving force of the transport motor.
• Rotation of the transfer belt causes the transfer belt driven roller to rotate. The drive transmission gear located at the transfer belt driven
roller rotates the waste toner conveying screw of the cleaning mechanism.
The following illustration is for bizhub C368/C308/C258.
[1]
[1] Waste toner conveying screw
[3] Transfer belt
[5] Transfer belt drive roller
7.3.2 1st transfer roller control
• Pressure mechanism is equipped for pressing the 1st transfer rollers (Y, M, C) to inside the transfer belt at the 1st transfer.
• The 1st transfer roller (K) does not have pressure retraction mechanism. The 1st 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 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 "
(1) 1st transfer roller pressure
• Rotation of the fusing motor is transmitted to the transfer belt retraction clutch via the fusing drive release gear.
• When the 1st transfer pressure 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 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 transfer roller drive arm being rotated. The rotation of the 1st transfer roller drive arm
lowers the 1st transfer 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 1st transfer pressure
sensor.
• The actuator blocks the 1st transfer pressure sensor and the slide plate movement is detected.
• The 1st transfer pressure clutch is turned OFF.
• The cam will stop rotating and the siding plate will stop.
• The 1st transfer roller (Y, M, and C) will stay being pressed.
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 7. 1ST
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[4]
[5]
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[4]
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O-51
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Transfer belt driven roller
Transport motor (M1)
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O.13.3.1 Fusing drive release
TRANSFER SECTION
mechanism".