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.