Faint Print - Brother DCP-L5500D Service Manual

 White vertical streaks
Step
Dirty charge electrodes
1
2 Laser unit failure
 White horizontal streaks
Step
Dirty charge electrodes
1
2 Scratch or dirt on the fuser unit
High-voltage power supply PCB
3
failure
 Faint print
Step
1 Laser unit failure
2 Fuser unit failure
3 Main PCB failure
<User Check>
• Clean the corona wire of the drum unit.
• Check that there is no dust on the toner cartridge.
• Refer to < How to clean the drum unit>
exposure drum using a cotton applicator.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Cause
<User Check>
• This problem may disappear after printing multiple sheets of paper.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Cause
<User Check>
• Check that the machine is positioned on a level surface.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Cause
2-102
to remove the dirt from the
Remedy
Clean the electrodes of the drum unit and those
of the machine. (Refer to
Replace the laser unit.
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-9.)
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Remedy
Replace the laser unit.
Replace the fuser unit.
Replace the main PCB ASSY.
Fig. 2-8 and Fig. 2-9.)
Fig. 2-8 and
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