Periodic Defective Image - Samsung ML-2571N Service Manual

4.4 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
1 OPC Drum
2 Charge Roller
3 Supply Roller
4 Developing Roller
5 Transfer Roller
6 Heat Roller
7 Pressure Roller
8 Feed Roller
Samsung Electronics
Defective image
75.5mm
37.7mm
47.5mm
35.2mm
46.2mm
77.7mm
75.4mm
?
8
1
OPC Drum
2
Charge Roller
3
Supply Roller
4
Developing Roller
Alignment and Adjustments
Typical defect
white spot on black image or black spot
black spot
light or dark horizontal image band
horizontal image band
image ghost
Black spot and image ghost, H/R :
black spot on the backside
?
BIN PATH
5
Transfer Roller
6
Heat Roller
7
Pressure Roller
8
Feed Roller
24.75
Service Manual
4-5