Brother HL-4140CN Service Manual page 116

■ Error code FE
Calibrate
Calibration failed. Press Go, and try again.
Detection of incorrect measurement value of density sensor sensitivity calibration.
<User Check>
- Replace the waste toner box with a new one.
- Replace the belt unit with a new one.
Step
1 Harness connection failure of
registration mark sensor holder
ASSY
2 Harness connection failure of
shutter solenoid
3 Registration mark sensor holder
ASSY failure
4 High-voltage power supply PCB
failure
5 Main PCB failure
■ Error code FF
Unusable Device
Remove the Device. Turn the power off and back on again.
Wireless LAN overcurrent
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
error. (Wireless LAN model only)
Cause
2-85
Remedy
Check the harness connection of the
registration mark sensor holder ASSY and
reconnect it.
Check the harness connection of the
shutter solenoid and reconnect it.
Replace the registration mark sensor
holder ASSY.
Replace the high-voltage power supply
PCB ASSY.
Replace the main PCB ASSY
Remedy
Replace the main PCB ASSY.
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