Brother HL-L5000D Service Manual page 80

 Error code 6901
An error occurred in the fuser unit when the power switch was turned ON or sleep mode was
released.
Error code 6902
Rechecking the error after the power switch was turned OFF and then ON again because an
error was detected in the fuser unit.
(This message is displayed for approximately 15 minutes when the machine is restarted after
error code 6901 has occurred.)
Step
Connection failure of a fuser unit
1
harness
Connection failure of the eject
2
sensor harness
3 Eject sensor PCB failure
4 Fuser unit failure
Low-voltage power supply PCB
5
failure
6 Main PCB failure
Note:
• Turn OFF the power switch. After the fuser unit has cooled sufficiently, turn ON the
power switch again and leave the machine for 15 minutes. This problem may then be
cleared.
• To release the fuser unit error after taking appropriate measures, enter the
maintenance mode once and quit it with the maintenance code 99.
 Error code 6A00
Detected discharge that may be attributable to dirty corona wire on the drum unit.
<User Check>
• Slide the green tab of the drum unit to left and right for two to three times to clean the
corona wire.
• Clean the electrode of the drum unit.
• Replace the drum unit.
Step
Dirt on the high-voltage power
1
supply PCB terminal
High-voltage power supply PCB
2
attachment failure
High-voltage power supply PCB
3
failure
4 Main PCB failure
Cause
Reconnect the fuser unit harness.
Reconnect the eject sensor harness.
Replace the eject sensor PCB ASSY.
Replace the fuser unit.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Cause
Clean the electrodes of the machine.
(Refer to
Check if each electrode comes back smoothly
after pressing it. If not, reattach each electrode.
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
2-54
Remedy
Remedy
Fig. 2-7.)
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