2-102
Confidential
■
One color band
<User Check>
- Clean the corona wire of all four colors on the drum unit.
- Return the cleaning tab of the corona wire to the
position.
- This symptom might stop occurring after making several prints.
- Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
■
Downward fogging of solid color
■
Horizontal lines
Step
Cause
Remedy
1
Installation failure of each FG
wire and/or FG plate
(Grounding is not performed
correctly.)
Retighten the screws of each FG wire and/or
FG plate. Repair the bend of the tray ground
spring of the paper tray.
(Refer to
.)
2
Dirt on the exposure drum
Perform drum cleaning.
(Refer to
“2.2 Drum Cleaning” in Chapter 5
3
Laser unit failure
Replace the laser unit.
<User Check>
- Replace the toner cartridge with a new one.
Step
Cause
Remedy
1
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
2
Main PCB failure
Replace the main PCB ASSY.
<User Check>
- This symptom might stop occurring after making
several prints.
- Refer to the User’s guide and remove the dirt on the
exposure drum using a cotton swab.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step
Cause
Remedy
1
Dirt on charged electrode
Clean the electrodes of the drum unit and
main body.
(Refer to
.)
2
Dirt on the exposure drum
Perform drum cleaning.
(Refer to
“2.2 Drum Cleaning” in Chapter 5
3
Scratch and dirt on fuser unit
Replace the fuser unit.
4
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
