Brother MFC9440CN
Troubleshooting. Image Defect. Vertical streaks
Vertical streaks
User Check
- This problem may occur with noise which is caused by dirt on the corona wire in the drum unit. In this case, clean the corona wire with the wire cleaner.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step | Cause | Check | Result | Remedy |
---|---|---|---|---|
1 | Dirt in the paper feed system | Is the paper tray or feed system on the drum unit dirty with toner? | Yes | Wipe dirt off. |
2 | Scratch on the exposure drum | Is there a scratch on the surface of the exposure drum? | Yes | Replace the drum unit. |
3 | Exposure drum dirty | Is there vertical dirt with toner on the surface of the exposure drum? | Yes | Replace the drum unit. |
4 | Scratch on the heat roller | Is there a scratch on the surface of the heat roller? | Yes | Replace the fuser unit |
Note:
If the machine prints the same pattern, especially including vertical streaks, continuously, black vertical streaks may appear on the paper since the electrostatic performance of the exposure drum is decreased temporally.
Vertical streaks in a light background
User Check
- Clean the inside of the machine and the corona wire in the drum unit.
- Replace the toner cartridge with a new one.
Step | Cause | Check | Result | Remedy |
---|---|---|---|---|
1 | Drum unit failure | Is the problem solved after replacing the drum unit? | Yes | Replace the drum unit. |