Brother MFC-L2732DW

Light

User Check

• Check the usage environment of the machine. Using the machine in hot-humid or cold-dry conditions can cause this problem.
• If the whole page is light, toner save mode may be ON. Turn OFF the toner save mode.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
• Turn ON the power switch, and leave the machine for a while (condensation).
• Check if paper is not damp.
• Use specified paper.

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.
2	Dirt on the electrodes of the toner cartridge and those of the machine	Clean the electrodes of the toner cartridge, process unit and those of the machine.
3	Dirt on the electrodes of the high-voltage power supply PCB and those of the machine	Clean the electrodes of the high-voltage power supply PCB and those of the machine.
4	Fuser unit failure	Replace the fuser unit.
5	High-voltage power supply PCB failure	Replace the high-voltage power supply PCB ASSY.
6	Main PCB failure	Replace the main PCB ASSY.

Faulty registration

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	Laser unit failure	Replace the laser unit.
3	Main PCB failure	Replace the main PCB ASSY.

Dark

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

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.
2	Wrong adjusted value of the laser unit entered	Refer to “Entering Adjusted Value of Laser Unit” in Chapter 4, and enter the adjusted value of the laser unit correctly.
3	Dirt on the electrodes of the high-voltage power supply PCB	Clean the electrodes of the high-voltage power supply PCB.
4	Fuser unit failure	Replace the fuser unit.
5	High-voltage power supply PCB failure	Replace the high-voltage power supply PCB ASSY.
6	Laser unit failure	Replace the laser unit.
7	Main PCB failure	Replace the main PCB ASSY.

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.
• 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. 2-12 (P2- 56) and Fig. 2-13 (P2-56).)
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. 2-12 (P2-56) and Fig. 2-16 (P2-84).)
3	Fuser unit failure	Replace the fuser unit.
4	High-voltage power supply PCB failure	Replace the high-voltage power supply PCB ASSY.
5	Low-voltage power supply PCB failure	Replace the low-voltage power supply PCB ASSY.
6	Laser unit failure	Replace the laser unit.
7	Main PCB failure	Replace the main PCB ASSY.