Trouble Shooting
| Steps | Cause | Solution | Parts |
| 1 | There is dirt in the paper path | Wipe off the dirt. Please refer to the spacing of the various rollers in the image. | |
| 2 | There is dirt on the heating roller of the fuser. | Replace the fuser. | Fuser AM4XA (002-B209-0-SP) AM4XA plus (002-C123-0-SP) |
| 3 | There is dirt on the surface of the OPC(Organic Photo Conductor) or the drum is damaged. | Replace the drum unit. <Video Link> | Drum unit (015-0333-22) |
| 4 | The toner cartridge near end of life. | Replace the toner cartridge. <Video Link> | Toner (015-0292-22) |
The spacing of various rollers in the image
Periodic image defects can be caused by defects in various rollers. Refer to the table below to determine the cause of the defect based on the diameter of the various rollers or the spacing in the image.
| The name of the part | The spacing in the image |
| Development roller (toner). | 33.1 mm |
| Drum Unit (OPC). | 75.4 mm |
| Heating roller in the fuser. | 63.58 mm |
