2-104
Confidential
■
Unstable color density
■
Hollow print
<User Check>
- Make a print on a different type of paper.
- Replace the belt unit with a new one.
- Replace the waste toner box with a new one.
- Replace the toner cartridge with a new one.
- Replace the drum 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
.)
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
.)
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
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
5
Laser unit failure
Replace the laser unit.
6
Main PCB failure
Replace the main PCB ASSY.
<User Check>
- Check the machine’s environment. High temperature and high humidity
or low temperature and low humidity conditions can cause this problem.
- Refer to the User’s guide and remove the dirt on the exposure drum
using a cotton swab.
- Replace the toner cartridge with a new one.
- Replace the drum unit with a new one.
Step
Cause
Remedy
1
Dirt in the paper dust cleaning
roller
Clean the paper dust cleaning roller.
(Refer to
2
Dirt on the exposure drum
Perform drum cleaning.
(Refer to
“2.2 Drum Cleaning” in Chapter 5
3
Scratch and dirt on fuser unit
Replace the fuser unit.
4
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
