<Location of the leser beam window>

Fig. 3-6

■Faulty registration

<User Check>

-Check that the appropriate media type is selected in the printer driver.

Step

Cause

Check

Result

Remedy

 

 

 

 

 

 

 

 

 

 

 

Registration rear

Does the registration

 

Re-assemble the

1

actuator catching

rear actuator move

No

registration rear actuator.

 

on some position

smoothly?

 

 

 

 

 

 

 

2

Drum unit failure

Is the rotation torque of

Yes

Replace the drum unit.

 

the drum unit heavy?

 

 

 

 

 

 

 

 

 

 

■ Dark

<User Check>

-Check the machine's environment. High temperature and high humidity conditions can cause this problem.

-Replace the drum unit with a new one.

-Replace the toner cartridge with a new one.

Step

Cause

Check

Result

Remedy

 

 

 

 

 

 

 

 

 

 

1

Drum unit

Is the electrode of the

Yes

Clean the electrode.

electrode dirty

drum unit dirty?

 

 

 

 

 

 

 

 

 

 

 

Drum unit failure

Is the problem solved

 

Replace the drum unit.

2

 

after replacing the drum

Yes

 

 

 

unit?

 

 

 

 

 

 

 

 

Developing bias

Is the problem solved

 

Reset the developer roller

3

malfunciton

after reseting the

Yes

counter.

 

 

developer roller counter?

 

 

 

 

 

 

 

 

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?

 

 

 

 

 

 

 

3-47

Confidential