Specifications

7-17
Samsung Electronics
Alignment & Adjustments
Service Manual
7.6 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 same position in each page white spot on black image or black spot
2 Charge Roller 43.96 mm black spot
3 Supply Roller 31.41 mm light or dark horizontal image band
4 Developing Roller 35.34 mm horizontal image band
5 ITB(T1) same position in each page black spot
6 Transfer Roller(T2) 75.36 mm ghost
7 Heat Roller 109.9 mm Black spot and ghost, printing backside pollution