Brother HL-4040CN Service Manual page 51

Error code CC
No Fuser Unit
Install the Fuser Unit.
Fuser unit is not installed into the machine.
User Check
- Check if the fuser unit is installed into the machine.
Step
1 Harness connection failure
between fuser unit connector
and engine PCB
2 Engine PCB failure
3 Main PCB failure
Error code CD
No Drum Unit
Install the Drum Unit.
Drum unit is not installed into the machine.
User Check
- Check if the drum unit is installed into the machine.
Step
1 Dirt on electrodes on drum
unit and front door unit ASSY
2 Bending of front door unit
ASSY electrode contact
3 Harness connection failure
between front door unit ASSY
electrode and engine PCB
ASSY
4 Engine PCB failure
Cause
Check the harness connection between the fuser
unit connector and engine PCB, and reconnect it.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Cause
Clean both electrodes.
(Refer to
Correct the electrode bending of the front door unit
ASSY.
Check the harness connection between the front
door unit ASSY electrode and engine PCB ASSY.
Replace the engine PCB ASSY.
1-34
Remedy
Remedy
Fig. 1-2 and Fig 1-3 (P 1-35).)
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