Canon imageCLASS MF445dw
Troubleshooting. Recurring faulty image
Overview
Foreign matters or lines on rollers along the paper feed path may cause faulty images in the vertical scanning direction.
Field Remedy
See the roller pitches listed in the tables below to clean and/or replace the corresponding parts.
CAUTION:
Since the Primary Charging Roller, Photosensitive Drum, and Developing Roller are located inside the cartridge and they
cannot be cleaned on a single part basis, replace the cartridge itself.
| Roller pitch | Parts | Symptom | |||
|---|---|---|---|---|---|
| Soiling | White spots | Soiled back | Fixing failure | ||
| Approx. 50 mm | Cassette Pickup Roller | Occurs | - | - | - |
| Approx. 44 mm | Cassette Separation Roller | - | - | Occurs | - |
| Approx. 50 mm | Cassette Feed Roller | Occurs | - | - | - |
| Approx. 43 mm | Registration Roller | - | - | Occurs | - |
| Approx. 39 mm | Transfer Roller | - | Occurs | Occurs | - |
| Approx. 28 mm | Primary Charging Roller | - | Occurs | - | - |
| Approx. 75 mm | Photosensitive Drum | Occurs | Occurs | - | - |
| Approx. 31 mm | Developing Roller | - | Occurs | - | - |
| Approx. 57 mm | Fixing Film | Occurs | Occurs | - | Occurs |
| Approx. 63 mm | Pressure Roller | Occurs | - | Occurs | Occurs |