Itb (Image Transfer Belt) Cleaning Unit - Ricoh PE-P1 Service Manual

6. Detailed Section Descriptions
The transfer belt contact motor [B] turns the CMY contact cam shaft [C] when the machine starts to make
a color print. The CMY contact cams slide the right and left sliders [D] and these sliders lift the belt transfer
rollers for each OPC drum (CMY) to the transfer belt. Because of this mechanism, the life of the transfer
belt is longer (it is not necessary for the transfer belt to touch the color OPC drums when the machine makes
a black and white print). However, if the customer selects "Off" with the "ACS" setting, the four OPC drums
always touch the image transfer belt.
The ITB (image transfer belt) contact sensor [E] detects if the image transfer rollers for each OPC drum
(CMY) touch the transfer belt. If they do not touch the transfer belt during color printing, the machine stops
and shows SC 445, 446, or 447.

ITB (Image Transfer Belt) Cleaning Unit

6
The ITB cleaning blade [A] in the cleaning unit removes remaining toner on the image transfer belt after
image transfer to the paper. The toner collection coil [B] moves the collected waste toner to the outlet for
the waste toner bottle.
The ITB cleaning unit has a shutter mechanism at the outlet for the waste toner bottle. When the ITB unit is
removed, the shutter closes the outlet to prevent waste toner from falling.
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