2-50
Confidential
Dark
Poor fixing
<User Check>
• Check the usage environment of the machine. Using the machine in
hot-humid or cold-dry conditions can cause this problem.
• If a new toner cartridge has been detected, check that it was not
replaced with another toner cartridge.
• Execute density adjustment from the control panel.
• Clean the corona wire of the drum unit.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Step
Cause
Remedy
1
Dirt on the electrodes of the
drum unit, toner cartridge and
those of the machine
Clean the electrodes of the drum unit, toner
cartridge and those of the machine. (Refer to
and
2
Wrong adjusted value of the
laser unit entered
Refer to
“3.1 Entering Adjusted Value of
, and enter the
adjusted value of the laser unit correctly.
3
Dirt on the electrodes of the
high-voltage power supply PCB
Clean the electrodes of the high-voltage
power supply PCB.
4
Fuser unit failure
Replace the fuser unit.
5
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
6
Laser unit failure
Replace the laser unit.
7
Main PCB failure
Replace the main PCB ASSY.
<User Check>
• Check the usage environment of the machine. Using the machine in
hot-humid or cold-dry conditions can cause this problem.
• Clean the corona wire of the drum unit.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Step
Cause
Remedy
1
Dirt on the electrodes of the
drum unit, toner cartridge and
those of the machine
Clean the electrodes of the drum unit, toner
cartridge and those of the machine. (Refer to
and
2
Fuser unit failure
Replace the fuser unit.
3
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
4
Low-voltage power supply
PCB failure
Replace the low-voltage power supply PCB
ASSY.
5
Laser unit failure
Replace the laser unit.
6
Main PCB failure
Replace the main PCB ASSY.