Brother DCP8110D

4.7.1 New toner is not detected

User Check

- Be sure to set a new toner cartridge.

Step	Cause	Remedy
1	New toner actuator caught in some sections of the machine	Reattach the new toner actuator.
2	Connection failure of the relay front PCB harness	Reconnect the relay front PCB harness.
3	New toner sensor failure	Refer to "Check sensor operation (function code: 32)" to check the sensor operation. If the sensor operation is faulty, replace the relay front PCB ASSY.
4	Main PCB failure	Replace the main PCB ASSY.

4.7.2 Cartridge error (toner cartridge cannot be detected)

Failed to determine whether the toner cartridge is new or old.

Step	Cause	Remedy
1	The power switch was turned OFF or the front cover was opened while a new toner cartridge is being detected.	Reset the developer roller counter. (Refer to "Reset Developer Roller Counter")
2	New toner actuator coming off	Reattach the new toner actuator.
3	New toner sensor failure	Refer to "Check sensor operation (function code: 32)" to check the sensor operation. If the sensor operation is faulty, replace the relay front PCB ASSY

4.7.3 Drum error

User Check

- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one, and reset the drum counter.

Step	Cause	Remedy
1	Dirt (dust) on electrodes of the drum unit	Clean the electrodes of the drum unit and those of the machine.
2	High-voltage power supply PCB failure	Replace the high-voltage power supply PCB ASSY.
3	Main PCB failure	Replace the main PCB ASSY.