Brother HL-4140CN Service Manual page 105

■ Error code CC
No Fuser Unit
Install the Fuser Unit
The fuser 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
■ Error code CD
No Drum Unit
Install the Drum unit.
The drum unit is not installed.
<User Check>
- Check if the drum unit is installed into the printer.
Step
1 Dirt on the electrode of the drum
unit and on the printer
2 Bend of electrode contact of
main body
3 Contact failure between the
electrode of the high-voltage
power supply PCB ASSY and
that of the printer
4 High-voltage power supply PCB
failure
5 Engine PCB failure
Cause
Cause
2-74
Remedy
Replace the main PCB ASSY.
Remedy
Clean the dirt on the contact points of the
both electrodes.
(Refer to Fig. 2-6 (P2-52)
(P2-53))
Correct the bend of the electrode contact
of the main body.
Clean the electrodes of the high-voltage
power supply PCB ASSY.
Replace the high-voltage power supply
PCB ASSY.
Replace the engine PCB ASSY.
and Fig. 2-9
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