Abnormal Image Printing And Defective Roller - Samsung SCX-6555N Service Manual

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
1 OPC Drum
2 Charge Roller
3 Develop Roller
4 Transfer Roller
5 Heat Roller
6 Pressure Roller
Service Manual
CÓPIA NÃO CONTROLADA
Alignment & Troubleshooting
1
OPC Drum
2
Charge Roller
Abnormal image period
94.30mm
43.96mm
39.25mm
57.14mm
125.6mm
157mm
CÓPIA NÃO CONTROLADA
Pick_UP Pick_UP
Roller Roller
3
Developing Roller
4
Transfer Roller
Kind of abnormal image
White spot, Block spot
Horizontal density band
Black side contamination/transfer fault
Black spot and fuser ghost
Black side contamination
4-14
5
6
2
1
4
3
MP Feed MP Feed
Roller Roller
5
Heat Roller
6
Pressure Roller
Black spot
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