Brother DCP-L5500D, Руководство по обслуживанию

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2-102
Confidential

White vertical streaks
 White horizontal streaks
 Faint print
<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> to remove the dirt from the
exposure drum using a cotton applicator.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Step Cause Remedy
1
Dirty charge electrodes Clean the electrodes of the drum unit and those
of the machine. (Refer to
Fig. 2-8 and Fig. 2-9 .)
2 Laser unit failure Replace the laser unit.
<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.
Step Cause Remedy
1
Dirty charge electrodes Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-8 and
Fig. 2-9 .)
2 Scratch or dirt on the fuser unit Replace the fuser unit.
3
High-voltage power supply PCB
failure Replace the high-voltage power supply PCB
ASSY.
<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.
Step Cause Remedy
1 Laser unit failure Replace the laser unit.
2 Fuser unit failure Replace the fuser unit.
3 Main PCB failure Replace the main PCB ASSY.