General Procedures and Information
WorkCentre 3119 06/06 6-41
GP 8 Periodic Defective Image
If a mark or other printing defect occurs at regular intervals down the page it may be caused by a
damaged or contaminated roller. Measure the repetition interval and refer to the table below to
identify the roller concerned
Figure 1
Table 1:
No Roller
Defective
Image
Typical Defect
1 OPC Drum 75.5mm White spots on a black image or vice versa
2 Charge Roller 37.8mm Black spots
3 Supply Roller 44.9mm Light or dark horizontal image bands
4 Developing Roller 35.2mm Horizontal band image
5 Transfer Roller 45.3mm Image Ghost
6 Heat Roller 64.0 Black image and image ghost
7 Pressure Roller 75.3mm Black spot on the backside
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