Brother HL-L5000D Service Manual page 78

 Error code 6004
The eject sensor detected that the fuser cover was open.
<User Check>
• Close the fuser cover.
Step
Eject actuator coming off or
1 caught in some sections of the
machine
2 Fuser cover attachment failure
Connection failure of the eject
3
sensor harness
4 Eject sensor PCB failure
5 Main PCB failure
 Error code 6101
The toner amount detection sensor detected that the toner cartridge was not set.
<User Check>
• Set the toner cartridge correctly.
Step
Toner amount detection sensor
1
PCB (light reception) failure
2 Relay front PCB failure
3 Main PCB failure
 Error code 6200
Detected that the drum unit was not set by detecting the GRID terminal current.
<User Check>
• Set the drum unit correctly.
Step
Dirt on the GRID terminals of the
1 drum unit and those of the
machine
Dirt on the high-voltage power
2
supply PCB terminal
high-voltage power supply PCB
3
failure
4 Main PCB failure
Cause
Reattach the eject actuator.
Reattach the fuser cover.
Reconnect the eject sensor harness.
Replace the eject sensor PCB ASSY.
Replace the main PCB ASSY.
Cause
Replace the toner amount detection sensor
PCB ASSY (light reception).
Replace the relay front PCB ASSY.
Replace the main PCB ASSY.
Cause
Clean the CHG and GRID terminals of the drum
unit and those of the machine.
(Refer to
Clean the high-voltage power supply PCB
terminal.
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
2-52
Remedy
Remedy
Remedy
Fig. 2-6 and Fig. 2-7.)
Confidential