No Roller Abnormal image period Kind of abnormal image
1 OPC Drum 75.5mm White spot, Block spot
2 Charge Roller 37.7mm Black spot
3 Supply Roller 44.9mm Horizontal density band
4 Develop Roller 35.2mm Horizontal density band
5 Transfer Roller 47.1mm Black side contamination/transfer fault
6 Heat Roller 77.8mm Black spot and fuser ghost
7 Pressure Roller1 62.8mm Black side contamination
8 Pressure Roller2 50.2mm Black side contamination
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