Brother HL-3040CN Service Manual page 109

■ Error code CF
Replace WT Box
Replace the Waste Toner Box. Refer to the User's Guide for instructions.
Waste toner box full (500 pages are printed after the waste toner sensor sticks at ON.)
Note:
The same message appears in the case of the error code F4.
< >
User Check
- Replace the waste toner box with a new one.
Step
1 Harness connection failure of
waste toner sensor
2 Waste toner sensor failure
3 HVPS control PCB failure
4 Main PCB failure
■ Error code DE
Print Unable DE
Turn the power off and then back on again.
The connector of the fuser unit thermistor is inserted incorrectly. (It is detected that the edge
temperature is lower than 60°C.)
Step
1 Connection failure of fuser unit
thermistor connector
2 Fuser unit failure
■ Error code E0
Print Unable E0
Turn the power off and then back on again.
Program error
< >
User Check
- Turn the power off and on.
Cause
Cause
3-45
Remedy
Check the harness connection of the
waste toner sensor and reconnect it.
Check the sensor performance following
the procedure described in
32". If any problem occurs, replace the
waste toner sensor.
Replace the HVPS control PCB ASSY.
Replace the main PCB ASSY.
Remedy
Check the connection of the fuser unit
thermistor connector and reconnect it.
Replace the fuser unit.
"Function code
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