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Alignment & Troubleshooting
Service Manual
4-14
Samsung Electronics
4.1.3 Abnormal Image Printing and Defective Roller
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.
No
Roller
Abnormal image period
Kind of abnormal image
1
OPC Drum
94.30mm
White spot, Block spot
2
Charge Roller
43.96mm
Black spot
3
Develop Roller
39.25mm
Horizontal density band
4
Transfer Roller
57.14mm
Black side contamination/transfer fault
5
Heat Roller
125.6mm
Black spot and fuser ghost
6
Pressure Roller
157mm
Black side contamination
1
OPC Drum
2
Charge Roller
3
Developing Roller
4
Transfer Roller
5
Heat Roller
6
Pressure Roller
4
1
3
2
5
6
Pick_UP
Roller
Pick_UP
Roller
MP Feed
Roller
MP Feed
Roller
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA