Samsung Electronics
Service Manual
Alignment and Adjustmens
6-20
6.6 Periodic Defective Image
If an image defects appears at regular intervals on the printed-paper, it is due to a faulty or damaged roller.
Refer to the table below and check the condition of the appropriate roller.
No Roller Defective image Typical defect
1 OPC Drum 75.40 mm white and black spot
2 Charge Roller 26.70 mm white/black spot and periodic band
3 Supply Roller 42.40 mm periodic band
4 Developing Roller 27.00 mm white spot, horizontal black band
5 Transfer Roller 43.90 mm periodic band
6 Gap-ring 39.00 mm periodic band
7 Pressure Roller 114.6 mm white/black spot
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