Abnormal Image Printing And Defective Roller - Samsung ML-2851ND/SEE Service Manual

4.1.5 Abnormal Image Printing and Defective Roller

If abnormal image prints periodically, check the parts shown below.
7-2
No Roller
1 OPC Drum
2 Charge Roller
3 Supply Roller
4 Developing Roller
5 Transfer Roller
6 Heat Roller
7-1 Pressure Roller _1st
7-2 Pressure Roller _2st
Service Manual
Alignment & Troubleshooting
7-1
Abnormal image period
75.5mm
26.7mm
47.1mm
35.2mm
47mm
77.6mm
62.8mm
37.7mm
4-8
Kind of abnormal image
White spot, Block Spots
Block Spot and Periodic Band
Periodic Band by little difference of density
White Spot, Horizontal black band
Ghost, Damaged Image by abnormal transfer
Black Spots or Vertical Black Band
Blackground
Blackground
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