Confidential
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Vertical streaks
User Check
- This problem may occur with noise which is caused by dirt on
the corona wire in the drum unit. In this case, clean the corona
wire with the wire cleaner.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step Cause
Check Result Remedy
1 Dirt in the paper
feed system
Is the paper tray or feed
system on the drum unit
dirty with toner?
Yes Wipe dirt off.
2 Scratch on the
exposure drum
Is there a scratch on the
surface of the exposure
drum?
Yes Replace the drum unit.
3 Exposure drum
dirty
Is there vertical dirt with
toner on the surface of
the exposure drum?
Yes Replace the drum unit.
4 Scratch on the
heat roller
Is there a scratch on the
surface of the heat roller?
Yes Replace the fuser unit
Note:
If the machine prints the same pattern, especially including vertical streaks, continuously, black
vertical streaks may appear on the paper since the electrostatic performance of the exposure
drum is decreased temporally.
Vertical streaks in a light background
User Check
- Clean the inside of the machine and the corona wire in the drum unit.
- Replace the toner cartridge with a new one.
Step Cause
Check Result Remedy
1 Drum unit failure Is the problem solved
after replacing the drum
unit?
Yes Replace the drum unit.
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