Brother HL-4140CN Service Manual page 115

■ Error code FA (K)
No Toner
Open the Front Cover, then install Toner Cartridge.
The black drum unit is not installed.
Error code FB (C)
No Toner
Open the Front Cover, then install Toner Cartridge.
The cyan drum unit is not installed.
Error code FC (M)
No Toner
Open the Front Cover, then install Toner Cartridge.
The magenta drum unit is not installed.
Error code FD (Y)
No Toner
Open the Front Cover, then install Toner Cartridge.
The yellow drum unit is not installed.
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
2-84
Remedy
Replace the main PCB ASSY.
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