Brother HL-4140CN Service Manual page 109

■ Error code E2
Print Unable E2
Turn the power off and then back on again.
When the center thermistor is lower than the idle temperature, it is detected that the side
thermistor temperature is higher than 280 °C.
Step
1 Heat roller dirty
2 Harness connection failure
between paper eject sensor PCB
ASSY and fuser unit
3 Side thermistor or center
thermistor failure
4 Paper eject sensor PCB failure
5 Main PCB failure
■ Error code E3
Print Unable E3
Turn the power off and then back on again.
Drum position sensor error.
Step
1 Harness connection failure of
drum position sensor PCB ASSY
2 Phase displacement of drum
gear
3 Drum position sensor failure
4 Engine PCB failure
■ Error code E4
-
Run out of paper.
This error does not usually occur in the normal use. The conceivable causes are noise around
the installation site, fluctuation of the power supply voltage, and failures in the software.
<User Check>
- Turn OFF the power switch, and turn it ON again after a while.
Step
1 Main PCB failure
Cause
Cause
Cause
2-78
Remedy
Clean the heat roller.
Check the harness connection between
the paper eject sensor PCB ASSY and
fuser unit, and reconnect it.
Replace the fuser unit.
Replace the paper eject sensor PCB
ASSY.
Replace the main PCB ASSY.
Remedy
Check the harness connection of the
drum position sensor PCB ASSY and
reconnect it.
Align the drum phase.
(Refer to "6. IF YOU REPLACE THE
DRUM DRIVE MOTOR" in Chapter
Replace the drum position sensor PCB
ASSY.
Replace the engine PCB ASSY.
Remedy
Replace the main PCB ASSY.
4.)
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