Brother HL-4040CN Service Manual page 35

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
Error code 5A
Print Unable 5A
Turn the power off and then back on again.
Charge HVPS PCB failure
Step
1 Charge HVPS PCB ASSY
harness connection failure
2 Charge HVPS PCB failure
3 Engine PCB failure
* The code included in the message above is some 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.
Cause
Check the harness connection between the
charge HVPS PCB and engine PCB, and the one
between the charge HVPS PCB and low-voltage
power supply PCB. Then, reconnect them.
Replace the charge HVPS PCB ASSY.
Replace the engine PCB ASSY.
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Remedy
Remedy
Confidential