Alignment & Adjustments
6.9 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 | 37.7mm | black spot |
Supply Roller | 47.8mm | light or dark horizontal image band |
Developing Roller | 35.2mm | horizontal image band |
Transfer Roller | 45.3mm | image ghost |
Heat Roller | 57.1mm | Black spot and image ghost |
Pressure Roller | 59.7mm | black spot on the backside |
|
|
|
| L S U |
|
Fuser | 2 | Toner Cartridge |
6 |
| |
| 4 | 3 |
7 | 1 | |
|
| |
| PTL | MP Sensor |
| 5 |
|
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