Brother MFC-9340CDW - Dirt on Back Side of Paper

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Confidential
■ Dirt on back side of paper
<User Check>
- This symptom might stop occurring after making
several prints.
- Replace the toner cartridge with a new one.
- Replace the belt unit.
- Replace the waste toner box.
Step Cause Remedy
1 Dirt in the paper feed system Wipe dirt off.
2 Dirt in the fuser unit Replace the fuser unit.
3 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.