3-26
Confidential
Error code 6D
Fuser unit error (The center thermistor detects lower temperature than the specified value.)
Error code 6F
Fuser unit error (The center or side thermistors detect extremely high temperature.)
Error code 76
Fuser unit error (The center thermistor detects rapid temperature rising.)
Error code 78
Fuser unit error (The center thermistor detects rapid temperature falling.)
Print Unable 6D
Turn the power off and then back on again.
Print Unable 6F
Turn the power off and then back on again.
Print Unable 76
Turn the power off and then back on again.
Print Unable 78
Turn the power off and then back on again.
Step Cause Remedy
1 Harness connection failure
between fuser unit connector and
eject front sensor PCB ASSY
Check the harness connection between
the fuser unit connector and eject front
sensor PCB ASSY, and reconnect it.
2 Harness connection failure
between eject front sensor PCB
ASSY and main PCB ASSY
Check the harness connection between
the eject front sensor PCB ASSY and
main PCB ASSY, and reconnect it.
3 Fuser unit failure Replace the fuser unit.
4 Low-voltage power supply PCB
failure
Replace the low-voltage power supply
PCB ASSY.
5 Eject front sensor PCB failure Replace the eject front sensor PCB ASSY.
6 Main PCB failure Replace the main PCB ASSY.
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