2-32
Confidential
4.2.4 Poor fixing
4.2.5 Completely blank
User Check
• Check the printer's environment. High temperature and high
humidity or low temperature and low humidity conditions can cause
this problem.
• Clean the corona wire of drum unit.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
• Return the green envelope levers to the home position. (Refer to
Fig. 2-6.)
Step Cause Remedy
1 Fuser unit failure Replace the fuser unit.
2 Laser unit failure Replace the laser unit.
3
Low voltage power supply PCB
ASSY failure
Replace the low voltage power supply PCB
ASSY.
4 Main PCB failure Replace the main PCB ASSY.
User Check
• Check the printer's environment. High temperature and high
humidity or low temperature and low humidity conditions can cause
this problem.
• Clean the corona wire of drum unit.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
• Remove the elastic band from the drum unit.
Step Cause Remedy
1
Dirt on the electrodes of the drum
unit and the printer body
Clean the electrodes of the drum unit and
printer body. (Refer to Fig. 2-8, Fig. 2-9.)
2
Scanner harness of the laser unit
connection failure
Reconnect the scanner harness of the
laser unit.
3
Laser unit not assembled correctly Assemble the laser unit correctly and
secure the screw.
4 Laser unit failure Replace the laser unit.
5
High voltage power supply PCB
ASSY failure
Replace the high voltage power supply
PCB ASSY.
6 Main PCB failure Replace the main PCB ASSY.
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General
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