Periodic Defective Image Or Abnormal Printing - Xerox WorkCentre PE120 Service Manual

Alignment and Adjustments

6.8 Periodic Defective Image or Abnormal Printing

If a mark or other printing defect occurs at regular intervals down the printed page it may be caused by a damaged
or contaminated roller. Measure the repeating defect and refer to the table below to identify the problem
component.
No Roller
1 OPC Drum
2 Charge Roller
3 Supply Roller
4 Developing Roller
5 Transfer Roller
6 Heat Roller
7 Pressure Roller
PTL
6-14
Fuser
PR
1
OPC Drum
2
Charge Roller
3
Supply Roller
4
Developing Roller
Defective image
75.5 mm
37.7 mm
44.9 mm
35.2 mm
47.1 mm
77.8 mm
75.4 mm
WorkCentre PE 120/120i
L S U
Toner Cartridge
CR
DR
OPC
SR
PTL
TR FR
5
Transfer Roller
6
Heat Roller
7
Pressure Roller
Typical defect
white spot on black image or black spot
black spot
light or dark horizontal density image band
horizontal density band
Back side contamination/transfer fault
black spot and fuser ghost
black spot on the backside
MP Sensor