Brother DCP-9055CDN Service Manual page 95

■ Error code 6A
Print Unable 6A
Turn the power off and then back on again.
Fuser unit error. (The center thermistor does not detect 60 °C within the specified time.)
Error code 6B
Print Unable 6B
Turn the power off and then back on again.
Fuser unit error. (The center thermistor does not detect 100 °C within the specified time.)
Error code 6C
Print Unable 6C
Turn the power off and then back on again.
Fuser unit error. (The center thermistor detects 270 °C or higher temperature for 1 second.)
Error code 6D
Print Unable 6D
Turn the power off and then back on again.
Fuser unit error. (The center thermistor detects 60 °C or lower temperature for 1 second during
standby or printing.)
Step
1 Fuser unit connector connection
failure
2 Fuser unit failure
3 Low-voltage power supply PCB
failure
4 Paper eject sensor PCB failure
5 Main PCB failure
■ Error code 6E
Print Unable 6E
Turn the power off and then back on again.
Fuser unit error. (The center thermistor fails to detect the temperature rise even after the
halogen heater is turned ON during printing and 15 second pass.)
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
Cause
Reconnect the connector of the fuser unit.
Replace the fuser unit.
Replace the low-voltage power supply PCB
ASSY.
Replace the paper eject sensor PCB
ASSY.
Cause
2-57
Remedy
Replace the main PCB ASSY.
Remedy
Replace the main PCB ASSY.
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