Alignment and Adjustmens
4.9 Periodic Defective Image
If a mark or other printing defect occurs at regular intervals down the page it may be caused by a damaged or contaminated roller. Measure the repetition interval and refer to the table below to identify the roller concerned.
No
1
2
3
4
5
6
7
Roller | Defective image | Typical defect |
OPC Drum | 75.5mm | white spot on black image or black spot |
Charge Roller | 37.8mm | black spot |
Supply Roller | 44.9mm | light or dark horizontal image band |
Developing Roller | 35.2mm | horizontal image band |
Transfer Roller | 45.3mm | image ghost |
Heat Roller | 64.0mm | Black spot and image ghost |
Pressure Roller | 75.3mm | black spot on the backside |
|
|
|
7 | 1 | 3 |
|
| |
|
| PTL |
|
| 5 |
MP Sensor
SCAN PART
1
2
3
4
OPC Drum
Charge Roller
Supply Roller
Developing Roller
5
6
7
Tramsfer Roller
Heat Roller
Pressure Roller
<Rollers Layout>
| Service Manual |
| Samsung Electronics |
