Brother DCP-9055CDN Service Manual page 134

■ Error code EB
Print Unable EB
Turn the power off and then back on again.
Read error in EEPROM of the laser unit.
Step
1 Harness connection failure
between laser unit and main
PCB ASSY
2 Laser unit failure
3 Engine PCB failure
4 Main PCB failure
■ Error code EC
Print Unable EC
Turn the power off and then back on again.
Fuser fan error.
Step
1 Harness connection failure of
fuser fan
2 Fuser fan failure
3 High-voltage power supply PCB
failure
4 Main PCB failure
■ Error code ED
Print Unable ED
Turn the power off and then back on again.
Communication with the wireless LAN PCB cannot be established upon startup of the power
supply. (Wireless LAN model only)
Step
1 Harness connection failure of
wireless LAN PCB
2 Wireless LAN PCB failure
3 Main PCB failure
Cause
Cause
Cause
2-96
Remedy
Check the harness connection between
the laser unit and main PCB ASSY, and
reconnect it.
Replace the laser unit.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Remedy
Check the harness connection of the
fuser fan and reconnect it.
Replace the fuser fan.
Replace the high-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
Remedy
Check the harness connection of the
wireless LAN PCB and reconnect it.
Replace the wireless LAN PCB.
Replace the main PCB ASSY.
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