Brother HL-3040CN Service Manual page 111

■ Error code E9
Print Unable E9
Turn the power off and then back on again.
Maintenance monitor error (The engine software detects an incorrect setting value.)
Step
1 Harness connection failure of
engine PCB ASSY
2 Engine PCB failure
3 Main PCB failure
■ Error code EC
Print Unable EC
Turn the power off and then back on again.
Main fan error (The engine PCB controls the rotation of the main fan.)
Step
1 Connection failure of main fan
connector
2 Main fan failure
3 HVPS control PCB failure
4 High-voltage power supply PCB
failure
5 Engine PCB failure
6 Main PCB failure
■ Error code EF
Print Unable EF
Turn the power off and then back on again.
Low-voltage power supply PCB failure
(It is detected that the average coverage value suddenly becomes 0 %.)
< >
User Check
- Turn the power off. Turn it on again after a while.
Step
1 Low-voltage power supply PCB
failure
2 Main PCB failure
Cause
Cause
Cause
3-47
Remedy
Check the harness connection between
the main PCB ASSY and engine PCB
ASSY, and reconnect it.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Remedy
Check the connection of the main fan
connector and reconnect it.
Replace the main fan ASSY.
Replace the HVPS control PCB ASSY.
Replace the high-voltage power supply
PCB ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Remedy
Replace the low-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
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