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Confidential
■ Error code 76
Fuser unit error. (The center thermistor detects the sharp temperature rise.)
Error code 78
Fuser unit error. (The center thermistor detects the sharp temperature fall.)
■ Error code 7A
Engine PCB failure (detection of motor lock error)
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.
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 Fuser unit failure Replace the fuser unit.
2 Low-voltage power supply PCB
failure
Replace the low-voltage power supply
PCB ASSY.
3 Paper eject sensor PCB failure Replace the paper eject sensor PCB
ASSY.
4 Main PCB failure Replace the main PCB ASSY.
Print Unable 7A
Turn the power off and then back on again.
Step Cause Remedy
1 Engine PCB failure Replace the engine PCB ASSY.
2 Main PCB failure Replace the main PCB ASSY.
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