Samsung ML-2015/XEV - Periodic Defective Image

Alignment and Adjustments
Samsung Electronics
Service Manual
4-5
BIN PATH
1
2
3
4
OPC Drum
Charge Roller
Supply Roller
Developing Roller
5
6
7
Transfer Roller
Heat Roller
Pressure Roller
4.5 Periodic Defective Image
If the delinquent image regularly occurs in the printed-paper, it is due to delinquent or damaged roller.
Refer to the table in below and check the condition of the roller.
No Roller Defective image Typical defect
1 OPC Drum 75.5mm white spot on black image or black spot
2 Charge Roller 37.7mm black spot
3 Supply Roller 47.5mm light or dark horizontal image band
4 Developing Roller 35.2mm horizontal image band
5 Transfer Roller 46.2mm image ghost
6 Heat Roller 63.9mm Black spot and image ghost
7 Pressure Roller 75.4mm black spot on the backside