Brother HL-L3210CW - Page 114

2-95
Confidential
■ Faulty registration
■ Dark
<User Check>
• Check whether appropriate paper type is selected on the
driver.
• Install the latest main firmware.
Step Cause Remedy
1
Registration rear actuator
coming off
Reattach the registration rear actuator.
2 Main PCB failure Replace the main PCB.
<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.
• 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.
• Replace the belt unit 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. 2-6 (P2-
63) and Fig. 2-7 (P2-63).)
2
Dirt on the electrodes of the
belt unit and those of the
machine
Clean the electrodes of the belt unit and
those of the machine. (Refer to Fig. 2-6 (P2-
63) and Fig. 2-11 (P2-94).)
3
Dirt on the electrodes of the
high-voltage power supply
PCB
Clean the electrodes of the high-voltage
power supply PCB.
4 Density sensor failure Replace the registration mark sensor L PCB.
5
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB.
6 Main PCB failure Replace the main PCB.