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■
Unstable color density
<User Check>
Step
1
Dirt on the electrodes of the
main body and the drum unit
2
Dirt on the electrodes of the
main body and the toner
cartridge
3
Dirt on the electrodes of the
main body and the belt unit
4
High-voltage power supply
PCB failure
5
Laser unit failure
6
Main PCB failure
■
Hollow print
<User Check>
Step
1
Dirt in the paper dust cleaning
roller
2
Dirt on the exposure drum
3
Scratch and dirt on fuser unit
4
High-voltage power supply
PCB failure
- 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.
Cause
- 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.
Cause
2-110
Remedy
Clean the electrodes of the main body and
the drum unit.
(Refer to
Fig. 2-5
(P2-57),
Clean the electrodes of the main body and
the toner cartridge.
(Refer to
Fig. 2-5
(P2-57),
Clean the electrodes of the main body and
the belt unit.
(Refer to
Fig. 2-5
(P2-57),
Replace the high-voltage power supply PCB
ASSY.
Replace the laser unit.
Replace the main PCB ASSY.
Remedy
Clean the paper dust cleaning roller.
(Refer to
Fig. 2-12
(P2-106).)
Perform drum cleaning.
(Refer to
"2.1 Drum Cleaning" in Chapter
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Fig. 2-6
(P2-57).)
Fig. 2-8
(P2-96).)
Fig. 2-9
(P2-97).)
5.)
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Table of Contents
Troubleshooting
