■Faint print

<User Check>

- Check that the machine is installed on a level surface. - Replace the toner cartridge with a new one.

- Clean the scanner windows of the toner unit with a soft cloth. (Refer to Fig. 3-6.)

-The drum unit may be damaged. Replace the drum unit with a new one.

Step

Cause

Check

Result

Remedy

 

 

 

 

 

 

 

 

 

 

 

Main PCB failure

Is the problem solved

 

Replace the main PCB

1

 

after replacing the main

Yes

ASSY.

 

 

PCB ASSY?

 

 

 

 

 

 

 

 

Laser unit failure

Is the problem solved

 

Replace the laser unit.

2

 

after replacing the laser

Yes

 

 

 

unit?

 

 

 

 

 

 

 

 

Toner empty

Is the "Toner Life End"

 

Replace the toner sensor

 

sensor failure

message indicated on

 

PCB ASSY.

3

 

the LCD after replacing

No

 

 

the current toner

 

 

 

 

 

 

 

cartridge with a new

 

 

 

 

one?

 

 

 

 

 

 

 

■White spots

<User Check>

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

- If the problem is not solved after printing a few pages, the drum unit may have glue from label stock on the exposure drum surface. Refer to the next page, and wipe it off gently with a cotton swab.

-The drum unit may be damaged. Replace the drum unit with a new one.

Step

Cause

Check

Result

Remedy

 

 

 

 

 

 

 

 

 

 

 

Toner attached

Are the horizontal

 

This problem will

 

on the develop

stripes at 42.5 mm

 

disappear by printing

1

roller

(develop roller

Yes

approximate 10 pages. If

 

 

circumference)

 

the same problem occurs,

 

 

intervals?

 

replace the toner cartridge.

 

 

 

 

 

 

Scratch and Dirt

Are the horizontal

 

Replace the drum unit.

 

on the exposure

stripes at 94.2 mm

 

 

2

drum

(exposure drum

Yes

 

 

 

circumference)

 

 

 

 

intervals?

 

 

 

 

 

 

 

 

Drum unit

Are the electrodes on

 

Clean both electrodes.

3

connection

the drum unit and

Yes

(Refer to Fig. 3-2, Fig. 3-3.)

 

failure

machine body dirty?

 

 

 

 

 

 

 

 

HVPS PCB

Is the problem solved

 

Replace the HVPS PCB

4

failure

after replacing the

Yes

ASSY.

 

 

HVPS PCB ASSY?

 

 

 

 

 

 

 

 

Main PCB failure

Is the problem solved

 

Replace the main PCB

5

 

after replacing the main

Yes

ASSY.

 

 

PCB ASSY?

 

 

 

 

 

 

 

3-54

Confidential