Confidential
9-34
I-10
Vertical Line
Phenomenon
Vertical line appears in the printed image as shown in print sample [10] of Fig.9-1.
Main Causes
(1) Foreign particles (dust, etc.) adhere to the parts located around the OPC belt and the transfer
belt, and consequently contact the toner image formed on the belt surface.
Fig. 9-11
Countermeasures
(1) Clean the stain of the belt cartridge PU.
(2) Clean the stain of the transfer belt.
(3) Remove the cleaning roller PU, and then clean the inside and outside of the waste toner
feeder.
Transfer unit PU
Paper feed roller PU
Transfer roller
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