2-96
Confidential
■ One color is light
<User Check>
- Check the machine’s environment. High temperature and high humidity or low temperature
and low humidity conditions can cause this problem.
- Adjust the color calibration from the control panel.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
- Wipe the scanner windows of the laser unit of the appropriate color with a soft, lint-free cloth.
■ Electrodes location of the toner cartridge
Fig. 2-8
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),
See the figure below.)
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.
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