Brother DCP-9040CN Service Manual page 35

Error code 57 (DCP-9042CDN/ MFC-9450CDN)
Jam Duplex
Pull out Tray 1 completely. Check inside the machine or open the Back
Cover to remove the jammed paper.
Paper jam while turning it over in duplex printing, or DX (Duplex) solenoid failure
User Check
- Check if the paper is jammed or not. If jammed, remove it.
Step
1 DX feed ASSY not assembled
correctly
2 Paper eject ASSY harness
connection failure
3 DX solenoid failure
4 Engine PCB failure
Error code 58
Fuser Error
Turn the power off, then on again. Leave the machine for 15 min.
Error code 59
Self-Diagnostic
Will Automatically Restart within 15 minutes.
If the same error is detected again 15 minutes later, the message below is indicated.
Print Unable 6A
Turn the power off and then back on again.
Fuser unit failure
Step
1 Harness connection failure
between fuser unit connector
and engine PCB
2 Fuser unit failure
3 Low-voltage power supply
PCB failure
4 Engine PCB failure
Cause
Reassemble the DX feed ASSY.
Check the harness connection of the paper eject
ASSY and reconnect it.
Replace the paper eject ASSY.
Replace the engine PCB ASSY.
* The code included in the message above is one of 68, 69, 6A, 6B,
6C, 6D, 6E, 6F, 76 and 78.
Cause
Check the harness connection between the fuser
unit connector and engine PCB, and reconnect it.
Replace the fuser unit.
Replace the PS PCB unit.
Replace the engine PCB ASSY.
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Remedy
Remedy
Confidential