Brother DCP-7080 Service Manual page 77

 Error code 6901
Self-Diagnostic
Turn the power off, then on again. Leave the machine for 15 min.
An error occurred in the fuser unit when the power switch was turned ON or sleep mode was
released.
Error code 6902
Self-Diagnostic
Will Automatically Restart within 15 minutes.
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 each fuser
1
unit harness
Connection failure of the
2
eject sensor PCB flat cable
Fuser unit failure
3
Eject sensor PCB failure
4
Low-voltage power supply PCB
5
failure
Main PCB failure
6
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 function code 99.
Cause
Reconnect each harness of the fuser unit.
Reconnect the eject sensor PCB flat cable.
Replace the fuser unit.
Replace the eject sensor PCB ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
2-42
Remedy
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