Brother DCP-L8400CDN Service Manual page 83

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Error code 6001
Cover is Open
Close the Front Cover.
The front cover sensor detected that the front cover was open.
< User Check >
- Close the front cover.
Step
1 Connection failure of the front
cover sensor harness
2 Front cover failure
3 Front cover sensor failure
4 Main PCB failure
■
Error code 6004
Cover is Open
Close the Back Cover of the machine.
The eject sensor detected that the fuser cover was open.
< User Check >
- Close the fuser cover.
Step
1 Eject actuator that has come off
or that has been caught
2 Fuser cover installation failure
3 Connection failure of the eject
sensor PCB harness
4 Eject sensor PCB failure
5 Main PCB failure
Cause
Reconnect the front cover sensor
harness.
Replace the front cover.
Replace the front cover sensor.
Replace the main PCB ASSY.
Cause
Re-assemble the eject actuator.
Re-assemble the fuser cover.
Reconnect the eject sensor PCB harness.
Replace the eject sensor PCB ASSY.
Replace the main PCB ASSY.
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Remedy
Remedy
Confidential