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Error code 7800
The registration front sensor does not detect paper pass within the specified time after the
first side was printed in duplex printing mode.
<User Check>
• Remove the jammed paper.
• Close the back cover correctly.
• Attach the duplex tray correctly.
Step
Foreign object in the rear of the
1
machine or duplex tray
Connection failure of the eject
2
motor harness
3
Duplex tray failure
4
Eject motor failure
Damaged gears in the paper
5
feeding system
6
Paper eject roller failure
7
Main PCB failure
Cause
Remove the foreign object.
Reconnect the eject motor harness.
Replace the duplex tray.
Replace the eject motor.
Replace the main frame L ASSY.
Replace the paper eject roller.
Replace the main PCB ASSY.
2-62
Remedy
Confidential
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Table of Contents
Troubleshooting
