Brother HL-L9200CDW - Page 118

2-98
Confidential
■ Dark
■ Poor fixing
<User Check>
- Check the machine’s environment. High temperature and high humidity
or low temperature and low humidity conditions can cause this problem.
- After a new toner cartridge is detected, check if other toner cartridge is
not inserted.
- Execute density adjustment from the control panel.
- Clean the corona wire of all four colors on the drum unit.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
- Replace the belt unit with a new one.
Step Cause Remedy
1 Dirt on the electrodes of the
main body and the drum unit
Clean the electrodes of the main body and
the drum unit.
(Refer to Fig. 2-5 (P2-57), Fig. 2-6 (P2-57).)
2 Dirt on the electrodes of the
main body and the toner
cartridge
Clean the electrodes of the main body and
the toner cartridge.
(Refer to Fig. 2-5 (P2-57), Fig. 2-8 (P2-96).)
3 Dirt on the electrodes of the
main body and the belt unit
Clean the electrodes of the main body and
the belt unit.
(Refer to Fig. 2-5 (P2-57), Fig. 2-9 (P2-97).)
4 Dirt on the electrodes of the
high-voltage power supply
PCB
Clean the electrodes of the high-voltage
power supply PCB.
5 Density sensor failure Replace the registration mark sensor unit.
6 Fuser unit failure Replace the fuser unit.
7 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
8 Main PCB failure Replace the main PCB ASSY.
9 Laser unit failure Replace the laser unit.
<User Check>
- Check the machine’s environment. High temperature and high humidity
or low temperature and low humidity conditions can cause this problem.
- Clean the corona wire of all four colors on the drum unit.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
- Replace the belt unit with a new one.
- Wipe the scanner windows of the laser unit with a soft, lint-free cloth.
Step Cause Remedy
1 Dirt on the electrodes of the
main body and the belt unit
Clean the electrodes of the main body and
the belt unit.
(Refer to Fig. 2-5 (P2-57), Fig. 2-9 (P2-97).)
2 Fuser unit failure Replace the fuser unit.
3 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
4 Low-voltage power supply
PCB failure
Replace the low-voltage power supply PCB
unit.
5 Laser unit failure Replace the laser unit.
6 Main PCB failure Replace the main PCB ASSY.