Brother HL-L5000D Service Manual page 101

 Error code 8903
The back cover/duplex tray sensor detected that the cover was open when duplex printing is
started. (Before registering printing data to engine)
Error code 8904
The back cover/duplex tray sensor detected that the cover was open during duplex printing.
(After registering printing data to engine)
<User Check>
• Close the back cover correctly.
• Attach the duplex tray correctly.
Step
Back cover/duplex tray sensor
1
attachment failure
Connection failure of the back
2 cover/duplex tray sensor
harness
3 Damaged back cover
4 Damaged duplex tray
5 Main PCB failure
 Error code 8A01
The registration rear sensor detected that the paper fed was smaller or larger than the
specified size in duplex printing mode.
<User Check>
• Use specified paper.
Step
Registration rear actuator
1 caught in some sections of the
machine
Registration rear sensor failure
2
High-voltage power supply PCB
3
failure
4 Main PCB failure
Cause
Reattach the back cover/duplex tray sensor.
Reconnect the back cover/duplex tray sensor
harness.
Replace the back cover.
Replace the duplex tray.
Replace the main PCB ASSY.
Cause
Reattach the registration rear actuator.
Replace the registration front/rear sensor PCB
ASSY.
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
2-75
Remedy
Remedy
Confidential