Poor Fixing - Brother HL-2290 Service Manual

 Dark
<User Check>
Step
Dirt on the electrodes of the
1 drum unit and those of the
machine
Wrong adjusted value of the
2 laser unit entered
Dirt on the electrodes of the
3
high-voltage power supply PCB
4 Fuser unit failure
High-voltage power supply
5
PCB failure
6 Laser unit failure
7 Main PCB failure
 Poor fixing
<User Check>
Step
Dirt on the electrodes of the
1 drum unit and those of the
machine
Dirt on the electrodes of the
2 toner cartridge and those of
the machine
3 Fuser unit failure
High-voltage power supply
4
PCB failure
Low-voltage power supply
5
PCB failure
6 Laser unit failure
7 Main PCB failure
• 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.
Cause
• 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.
Cause
2-66
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
42) and Fig. 2-9 (P2-42).)
Refer to "3.1 Entering Adjusted Value of
Laser Unit" in Chapter
adjusted value of the laser unit correctly.
Clean the electrodes of the high-voltage
power supply PCB.
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Replace the laser unit.
Replace the main PCB ASSY.
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
42) and Fig. 2-9 (P2-42).)
Clean the electrodes of the toner cartridge
and those of the machine. (Refer to
(P2-42) and Fig. 2-12 (P2-64).)
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the laser unit.
Replace the main PCB ASSY.
Fig. 2-8 (P2-
4, and enter the
Fig. 2-8 (P2-
Fig. 2-8
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