Brother HL-4140CN Service Manual page 113

■ Error code F1
-
Error code F2
WT Box End Soon
The waste toner box will reach the end of life soon.
(The belt cleaner voltage becomes lower than the specified value.)
Error code F3
-
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
■ Error code F4
High Temperature
Decrease room temperature and humidity to allow the machine to operate.
The waste toner box is at the end of life.
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
2-82
Remedy
Replace the main PCB ASSY.
Remedy
Replace the main PCB ASSY.
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