Periodic Defective Image - Samsung CLP-31 Series Service Manual

4.1.5 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
1 OPC Drum
2 Charge Roller
3 Supply Roller
4 Developing Roller
5 1 Transfer Roller
st
6 2 Transfer Roller
nd
7 Pressure Roller
8 Heat Roller
Pressure Pressure
roller roller
T2 roller T2 roller
Regi roller Regi roller
Service Manual
Alignment & Troubleshooting
Period
188.5mm
37.7mm Black Spot and line and Periodic Band
47.5mm Periodic Band by little difference of density
26.0mm
43.8mm Ghost, Damaged Image by abnormal tranfer
54.64mm Ghost, Damaged Image by abnormal tranfer
50.3mm
86.4mm
Exit roller Exit roller
T1 roller T1 roller
Heat roller Heat roller
ITB ITB
Pick up roller Pick up roller
4-10
Phenomenon
White and Black Spots
White Spot, Horizontal black band
Background
Black Spots or Vertical Black Band
OPC OPC
Charge roller Charge roller
Deve roller Deve roller
Supply roller Supply roller
Samsung Electronics