Brother DCP-9055CDN Service Manual page 90

■ Error code 56
Cover is Open
Close the Fuser Cover which can be found behind the Back Cover of the
machine.
The fuser cover is open.
<User Check>
- Close the fuser cover properly.
Step
1 Paper eject actuator catching on
some position
2 Paper eject sensor PCB failure
3 Main PCB failure
■ Error code 57
Jam Duplex
Pull out Tray 1 completely. Check inside the machine or open the Back Cover
to remove the jammed paper.
Paper is jammed in the duplex paper feed system.
<User Check>
- Check if the paper is jammed. If jammed, remove it.
- Use the A4 or Letter size paper.
Step
1 Foreign object around paper
eject
2 Foreign object around duplex
feed ASSY
3 Coming off of back flapper ASSY
4 Duplex feed ASSY not
assembled correctly
5 Duplex paper guide not
assembled correctly
6 Harness connection failure of
paper eject ASSY
7 Paper eject motor failure
8 Duplex feed ASSY failure
9 Duplex paper guide failure
10 Paper eject ASSY failure
11 Engine PCB failure
12 Main PCB failure
Cause
Cause
2-52
Remedy
Correct the position of the paper eject
actuator.
Check the sensor performance following
the procedure described in
32". If any problem occurs, replace the
paper eject sensor PCB ASSY.
Replace the main PCB ASSY.
Remedy
Remove the foreign object.
Remove the foreign object.
Re-assemble the back flapper ASSY.
Re-assemble the duplex feed ASSY.
Re-assemble the duplex paper guide.
Check the harness connection of the
paper eject ASSY and reconnect it.
Replace the paper eject motor.
Replace the paper tray 1.
Replace the paper tray 1.
Replace the paper eject ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
"Function code
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