1. The printing paper is wet
If the printing paper is damp, consider replacing it with dry paper and printing again.
2. Dirty or aging transfer roller
If it is checked that the transfer roller is dirty, the transfer roller needs to be cleaned; if it is aging, the transfer roller needs to be replaced.
3. The edge of the powder knife is aging
If the edge of the powder ejection knife is aging, just replace the powder ejection knife.
4. Wear of magnetic roller or charging roller
If the magnetic roller or charging roller is worn out, replace the magnetic roller or charging roller.
5. Photosensitive drum fatigue
If the photosensitive drum is fatigued, you can pause the printer for a period of time and then reprint the test.
6. Bad toner is used
If you use bad toner, you need to replace or clean the toner cartridge, because the toner cartridge has been contaminated with bad toner.