■Downward fogging of solid color

User Check

• Toner may be empty. Replace the toner cartridge with a new one.

Step

Cause

Check

Result

Remedy

 

 

 

 

 

 

 

 

 

 

 

HVPS PCB

Is the problem solved

 

Replace the HVPS PCB

1

failure

after replacing the

Yes

ASSY.

 

 

HVPS PCB ASSY?

 

 

 

 

 

 

 

 

Main PCB failure

Is the problem solved

 

Replace the main PCB

2

 

after replacing the main

Yes

ASSY.

 

 

PCB ASSY?

 

 

 

 

 

 

 

■ Horizontal lines

User Check

• The paper tray ground terminal provided in the machine body may be dirty. Clean the contact with a dry cloth.

Step

Cause

Check

Result

Remedy

 

 

 

 

 

 

 

 

 

 

 

Dirt on charged

Are the electrodes on

 

Clean both electrodes

1

electrode

the drum unit and

Yes

(Refer to Fig. 1-1, Fig. 1-2.)

 

 

machine body dirty?

 

 

 

 

 

 

 

 

Paper tray

Is the paper tray ground

 

Correct bending of paper

2

ground terminal

terminal bent, which is

Yes

tray ground terminal.

provided in

provided in the machine

 

 

 

 

 

machine body

body?

 

 

 

 

 

 

 

 

Laser unit failure

Is the problem solved

 

Replace the laser unit.

3

 

after replacing the laser

Yes

 

 

 

unit?

 

 

 

 

 

 

 

1-33

Confidential