1. Toner cartridge leakage: In addition to damage to the casing, it is usually caused by the accumulation of powder in the magnetic drum inside the toner cartridge during transportation or during use by some customers. The solution is simple, just turn the drum core a few turns in the forward direction.

2. The print file and the drum core have a longitudinal underpass of the same width of more than 1 cm at the same time: the general customer also believes that the powder is leaking. In fact, this is a problem with the scraper, which causes the powder on the stick core to be dirty.

3, the printed document appears in the vertical black track: usually the scraper and the small scraper on the side of the scraper are stuck with dirt or scraps of paper.

4. The horizontal underworld appears in the print file: Usually, the magnetic stick in the toner cartridge has accumulated powder, and it can be rotated a few times.

5. If there is obvious background gray on the printed file: usually there is something wrong with the drum core or toner.

6. The color of the printed file is uneven, and the famous white road: Can you see the toner from the magnetic stick from the outside? If you see some powder on the magnetic stick and no powder in some places, it means that the toner cartridge has run out.

7. If the printer prints a blank piece of paper: first check if there is any problem with the printer. If there is no problem, it means that there is something wrong with the toner cartridge during assembly.

1. Toner cartridge leakage: In addition to damage to the casing, it is usually caused by the accumulation of powder in the magnetic drum inside the toner cartridge during transportation or during use by some customers. The solution is simple, just turn the drum core a few turns in the forward direction.

2. The print file and the drum core have a longitudinal underpass of the same width of more than 1 cm at the same time: the general customer also believes that the powder is leaking. In fact, this is a problem with the scraper, which causes the powder on the stick core to be dirty.

3, the printed document appears in the vertical black track: usually the scraper and the small scraper on the side of the scraper are stuck with dirt or scraps of paper.

4. The horizontal underworld appears in the print file: Usually, the magnetic stick in the toner cartridge has accumulated powder, and it can be rotated a few times.

5. If there is obvious background gray on the printed file: usually there is something wrong with the drum core or toner.

6. The color of the printed file is uneven, and the famous white road: Can you see the toner from the magnetic stick from the outside? If you see some powder on the magnetic stick and no powder in some places, it means that the toner cartridge has run out.

7. If the printer prints a blank piece of paper: first check if there is any problem with the printer. If there is no problem, it means that there is something wrong with the toner cartridge during assembly.