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

Is the paper tray or feed

Yes

Wipe dirt off.

 

feed system

system on the drum unit

 

 

 

 

dirty with toner?

 

 

 

 

 

 

 

2

Scratch on the

Is there a scratch on the

Yes

Replace the drum unit.

 

exposure drum

surface of the exposure

 

 

 

 

drum?

 

 

 

 

 

 

 

3

Exposure drum

Is there vertical dirt with

Yes

Replace the drum unit.

 

dirty

toner on the surface of the

 

 

 

 

exposure drum?

 

 

 

 

 

 

 

4

Scratch on the

Is there a scratch on the

Yes

Replace the fuser unit

 

heat roller

surface of the heat roller?

 

 

 

 

 

 

 

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

Yes

Replace the drum unit.

 

 

replacing the drum unit?

 

 

 

 

 

 

 

1-47

Confidential