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Confidential
■ Vertical streaks in a dark background
<User Check>
- Clean the inside of the printer and the corona wire in the drum unit.
- 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.
■ Horizontal stripes
Step Cause Remedy
1 Exposure drum dirty Refer to "2.8 Drum Cleaning" in Chapter 5
and perform drum cleaning.
2 Laser unit failure Replace the laser unit.
<User Check>
- Clean the inside of the printer and the corona wire in the drum unit.
- This symptom might stop occurring after making several prints.
If the symptom continues, replace the toner cartridge with a new one.
- Replace the drum unit with a new one.
Step Cause Remedy
1 Dirt on charged electrode Clean the electrodes of the drum unit and
main body. (Refer to Fig. 2-6 (P2-52) and
Fig. 2-9 (P2-53))
2 Bend of tray ground spring Replace the paper tray.(Refer to Fig. 2-13
(P2-101))
3 Scratch on the heat roller Replace the fuser unit.
4 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
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