Brother DCP-9055CDN Service Manual page 130

■ Error code DE
Print Unable DE
Turn the power off and then back on again.
When the center thermistor is higher than the idle temperature, it is detected that the side
thermistor temperature is lower than 60 °C.
Step
1 Harness connection failure
between paper eject sensor PCB
ASSY and fuser unit
2 Side thermistor or center
thermistor failure
3 Paper eject sensor PCB ASSY
failure
4 Main PCB failure
■ Error code DF
Machine Error
Unplug machine, then call Brother.
FAX communication error of main PCB.
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 E0
Print Unable E0
Turn the power off and then back on again.
Program error. (An error occurred in the ROM checksum.)
Step
1 Firmware update failure
2 Main PCB failure
Cause
Cause
Cause
2-92
Remedy
Check the harness connection between
the paper eject sensor PCB ASSY and
fuser unit, and reconnect it.
Replace the fuser unit.
Replace the paper eject sensor PCB
ASSY.
Replace the main PCB ASSY.
Remedy
Replace the main PCB ASSY.
Remedy
Upload the latest firmware.
Replace the main PCB ASSY.
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