Dell 2355DN Service Manual page 73

4.1.4 Abnormal Image Printing and Defective Roller
If abnormal image prints periodically, check the parts shown below.
No Roller
1 OPC Drum
2 Charge Roller
3 Supply Roller
4 Develop Roller
5 Transfer Roller
6 Heat Roller
7 Pressure Roller
Service Manual
Alignment and Troubleshooting
2
4
1
3
5
1
OPC Drum
2
Charge Roller
3
Supply Roller
4
Developing Roller
Abnormal image period
75.5mm
37.7mm
44.9mm
35.2mm
47.1mm
77.8mm
75.4mm
4-33
6
7
5
Transfer Roller
6
Heat Roller
7
Pressure Roller
Kind of abnormal image
White spot, Block spot
Black spot
Horizontal density band
Horizontal density band
Black side contamination/transfer fault
Black spot and fuser ghost
Black side contamination