2-42
Confidential
 Error code 8000
First side printing started before finishing receiving the second side data in duplex printing 
mode due to the insufficient memory.
 Error code 8903
The back cover/duplex tray sensor detected that the cover was open when duplex printing is 
started. (Before registering printing data to engine)
Error code 8904
The back cover/duplex tray sensor detected that the cover was open during duplex printing. 
(After registering printing data to engine)
Print Overrun
-
<User Check>
• Print the print data stored in the memory.
• The size of printing data per page is too big. Change the printing contents to reduce the 
data size.
• Switch to single-side printing.
Step Cause Remedy
1
Main PCB failure Replace the main PCB ASSY.
2-sided Disabled 
Close the Back Cover of the machine.
2-sided Disabled 
Close the Back Cover of the machine.
<User Check>
• Close the back cover correctly.
Step Cause Remedy
1
Back cover/duplex tray sensor 
attachment failure
Reattach the back cover/duplex tray sensor.
2
Boss to push the back cover/
duplex tray sensor is broken.
Replace the back cover.
3
Back cover/duplex tray sensor 
failure
Replace the eject sensor PCB ASSY.
4
Main PCB failure Replace the main PCB ASSY.