Image Transfer Belt Cleaning Mechanism; Image Transfer Belt Drive Control - Ricoh MP C3004 Field Service Manual

7. Detailed Descriptions
transfer belt from the color photosensitive drum is controlled. Contact/separation of the Image transfer
belt unit is performed via a gear from an ITB contact and release motor (also used as a magenta toner
supply motor). Separation or contact is detected by the ITB contact and release sensor.
[A]: Slider
[B]: Drum
[C]: Contact and Release Cam
[D]: ITB contact and release motor (also used as a magenta toner supply motor)
[E]: ITB contact and release sensor
[F]: Guide
[G]: Image Transfer Roller

Image transfer belt drive control

FG Control is performed (Frequency Generator control: ensures precision of motor operation)
Image transfer flow
By arranging the imaging sequence in the order Y > M > C > Bk, cyan is laid on top of magenta, which
increases tolerance to image blurring and image reddening when dark blue is output, and improves
image quality.

Image transfer belt cleaning mechanism

Image transfer cleaning is performed by a cleaning blade (counter method).
Due to downsizing of machine width, the cleaning unit is installed on top of the Image transfer unit.
Therefore, to replace the cleaning unit, replacement must be performed after taking out the Image
transfer unit and inverting it.
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