Brother HLL3290CDW Service Manual page 157

■
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 belt unit and those of the
machine
3 Fuser unit failure
High-voltage power supply
4
PCB failure
Low-voltage power supply
5
PCB failure
6 Main PCB failure
■
Completely blank
<User Check>
Step
Dirt on the electrodes of the
1 drum unit and those of the
machine
Dirt on the electrodes of the
2 belt unit and those of the
machine
Connection failure of the LED
3
control flat cable
4 LED control flat cable failure
Dirt on the electrodes of the
high-voltage power supply
5
PCB and those of the
machine
6 Main PCB failure
• 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.
• Replace the belt unit with a new one.
Cause
• Clean the corona wire of the drum unit.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
• Install the latest main firmware.
Cause
2-121
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
78) and Fig. 2-12 (P2-78).)
Clean the electrodes of the belt unit and
those of the machine. (Refer to
78) and Fig. 2-16 (P2-119).)
Replace the fuser unit.
Replace the high-voltage power supply PCB.
Replace the low-voltage power supply PCB.
Replace the main PCB.
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
78) and Fig. 2-12 (P2-78).)
Clean the electrodes of the belt unit and
those of the machine. (Refer to
78) and Fig. 2-16 (P2-119).)
Reconnect the LED control flat cable.
Replace the LED control flat cable.
Clean the electrodes of the high-voltage
power supply PCB and those of the machine.
Replace the main PCB.
Fig. 2-11 (P2-
Fig. 2-11 (P2-
Fig. 2-11 (P2-
Fig. 2-11 (P2-
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