Brother DCP-L2500D, Руководство по обслуживанию

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2-68
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.
- 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 and those of the machine Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-8 and
Fig. 2-9 .)
2
Dirt on the electrodes of the toner
cartridge and those of the machine Clean the electrodes of the toner cartridge
and those of the machine. (Refer to
Fig. 2-8
and Fig. 2-9 .)
3
Wrong adjusted value of the laser
unit entered Refer to “1.4 Setting Serial Number and
Entering Adjusted Value of Laser Unit” in
Chapter 4
, and enter the adjusted value of
the laser unit correctly.
4
Dirt on the electrodes of the high-
voltage power supply PCB Clean the electrodes of the machine.
(Refer to
Fig. 2-9 .)
5
Fuser unit failure Replace the fuser unit.
6
High-voltage power supply PCB
failure Replace the high-voltage power supply PCB
ASSY.
7
Main PCB failure Replace the main PCB ASSY.
8
Laser unit failure Replace the laser unit.
<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 toner
cartridge and those of the machine Clean the electrodes of the toner cartridge
and those of the machine. (Refer to
Fig. 2-8
and Fig. 2-9 .)
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.