2-90
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
.)
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
,
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
.)
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.
