Brother DCP-7055 Service Manual page 104

■ Error code E2
Print Unable XX
Turn the power off and then back on again.
When the center thermistor is lower than the idle temperature, it is detected that the side
thermistor temperature is higher than 280 °C.
Step
1 Heat roller dirty
Harness connection failure
2 between paper eject sensor PCB
ASSY and fuser unit
Side thermistor or center
3
thermistor failure
Paper eject sensor PCB failure
4
5 Main PCB failure
■ Error code E3, E4
These errors do 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.
---
Error, which cannot be specified, occurs.
<User Check>
• Turn OFF the power switch, and turn it ON again after a while.
Step
1 Main PCB failure
■ Error code E6
Print Unable E6
Turn the power off and then back on again.
Write error in EEPROM of the main PCB.
Step
1 Main PCB failure
Cause
Cause
Cause
2-67
Remedy
Clean the heat roller.
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
Replace the main PCB ASSY.
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