Horizontal stripes

User Check

- Clean the inside of the machine and the corona wire in the drum unit. - Replace the drum unit with a new one.

Step

Cause

Check

Result

Remedy

1

Dirt on the

Are the electrodes on the

Yes

Clean both electrodes

 

charged electrode

drum unit and machine

 

 

 

 

body dirty?

 

 

 

 

 

 

 

2

Paper tray ground

Is the paper tray ground

Yes

Correct bending of paper

 

terminal provided

terminal bent, which is

 

tray ground terminal.

 

in the machine

provided in the machine

 

 

 

body

body? (Refer to Fig. 1-4.)

 

 

 

 

 

 

 

3

Toner attached on

Are the horizontal stripes

Yes

This problem will

 

the develop roller

at 37.4 mm (develop roller

 

disappear by printing

 

 

circumference) intervals?

 

approximate 10 pages. If

 

 

 

 

the same problem

 

 

 

 

occurs, replace the toner

 

 

 

 

cartridge.

 

 

 

 

 

4

Scratch on the

Are the horizontal stripes at

Yes

Replace the drum unit.

 

exposure drum

75.0 mm (exposure drum

 

 

 

 

circumference) intervals?

 

 

 

 

 

 

 

5

Scratch on the

Are the horizontal stripes

Yes

Replace the fuser unit.

 

heat roller

at 78.5mm (heat roller

 

 

 

 

circumference) intervals?

 

 

 

 

 

 

 

6

Transfer HVPS

Is the problem solved after

Yes

Replace the transfer

 

PCB failure

replacing the transfer

 

HVPS PCB ASSY.

 

 

HVPS PCB ASSY?

 

 

7

Charge HVPS

Is the problem solved after

Yes

Replace the charge

 

PCB failure

replacing the charge

 

HVPS PCB ASSY.

 

 

HVPS PCB ASSY?

 

 

 

 

 

 

 

Paper tray ground terminal

Fig. 1-4

1-48

Confidential