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Confidential
Error code 7700
The registration front sensor does not detect paper pass within the specified time after the
first side was printed in duplex printing mode.
Error code 7C00
The eject sensor was ON when the power switch was turned ON.
Jam 2-sided
Pull out the Duplex Tray at the back of the machine and remove the jammed paper.
<User Check>
• Remove the jammed paper.
• Close the back cover correctly.
• Close the paper tray correctly.
Step
Cause
Remedy
1
Foreign object in the duplex
paper feed system
Remove the foreign object.
2
Foreign object in the duplex
paper feed system of the paper
tray
Remove the foreign object.
3
Back cover attachment failure
Reattach the back cover.
4
Fuser cover attachment failure
Reattach the fuser cover.
5
Duplex tray failure
Replace the duplex tray.
6
Damaged gears in the feeding
system
Replace the main frame L ASSY.
7
Main PCB failure
Replace the main PCB ASSY.
Cover is Open
Make sure there is no paper jammed inside the machine and close the Back Cover,
then press Start.
<User Check>
• Close the back cover correctly.
Step
Cause
Remedy
1
Eject actuator caught in sections
of the machine
Reattach the eject actuator.
2
Fuser cover attachment failure
Reattach the fuser cover.
3
Back cover attachment failure
Reattach the back cover.
4
Eject sensor failure
Replace the eject sensor PCB ASSY.
5
Main PCB failure
Replace the main PCB ASSY.