Alignment & Troubleshooting
4.1.8 Abnormal Image Printing and Defective Roller
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.
| L S U |
|
|
|
|
Fuser | CR |
| Toner Cartridge | ||
|
|
|
|
| |
| OPC | DR |
|
|
|
PR | SR |
|
| ||
|
|
|
|
| |
| TR | PTL |
|
| MP Sensor |
|
|
| FR | ||
|
|
|
|
| R |
|
|
|
| K | / |
|
|
| IC |
| |
|
|
| P |
|
|
1 | OPC Drum | 5 | Transfer Roller | ||
2 | Charge Roller | 6 | Heat Roller | ||
3 | Supply Roller | 7 | Pressure Roller | ||
4 | Developing Roller |
|
|
|
|
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 | 37.0mm | Horizontal density band |
|
|
|
|
4 | Develop Roller | 35.2mm | Horizontal density band |
|
|
|
|
5 | Transfer Roller | 45.3mm | Black side contamination/transfer fault |
|
|
|
|
6 | Heat Roller | 66.3mm | Black spot and fuser ghost |
|
|
|
|
7 | Pressure Roller | 75.5mm | Black side contamination |
|
|
|
|
Service Manual | |
|
