Code :

Code: 6B03
Display: Drum Stop Replace the Drum Unit. Refer to the instructions in the carton of the new drum.
Description: Electric discharge was detected when the number of the drum unit (Magenta) rotations had become more than twice of the upper limit.
Causes: 1 Dirt on the GRID terminals of the main body 2 Dirt on the terminal of the high-voltage power supply PCB 3 High-voltage power supply PCB failure 4 Main PCB failure

Code: 6B04
Display: Drum Stop Replace the Drum Unit. Refer to the instructions in the carton of the new drum.
Description: Electric discharge was detected when the number of the drum unit (Cyan) rotations had become more than twice of the upper limit.
Causes: 1 Dirt on the GRID terminals of the main body 2 Dirt on the terminal of the high-voltage power supply PCB 3 High-voltage power supply PCB failure 4 Main PCB failure

Code: 6B0A
Display: Drum ! Slide the Green tab on Drum Unit.
Description: GRID current failure was detected in a state other than immediately after power was turned ON or the joint cover ASSY was closed.
Causes: 1 Dirt on the GRID terminals of the main body 2 Dirt on the terminal of the high-voltage power supply PCB 3 High-voltage power supply PCB failure 4 Main PCB failure

Code: 6E00
Display: Toner Error One or more Toner Cartridges are not detected. Pull out and reinsert all 4 Toner Cartridges.
Description: The develop release sensor detected the develop roller disengagement or engagement failure.
Causes: 1 Develop release sensor harness connection failure 2 High-voltage power supply PCB harness connection failure 3 Develop release sensor failure 4 Misalignment of develop clutch cam 5 Develop release clutch failure 6 High-voltage power supply PCB failure 7 Main PCB failure

Code: 7000
Display: Jam Inside Open the Top Cover, pull out all four drum and toner cartridge assemblies and remove the jammed paper.
Description: After the registration rear sensor detects the end of paper pass, the eject sensor does not detect paper pass.
Causes: 1 Foreign object inside machine 2 Eject actuator that has come off or that has been caught 3 Fuser cover installation failure 4 Eject sensor PCB harness connection failure 5 Fuser cover failure 6 Eject sensor failure 7 Fuser unit failure 8 Main PCB failure

Code: 7100
Display: Jam Rear Open the Back Cover and remove the jammed paper, then press [Start].
Description: After the registration rear sensor detected that paper has passed, eject sensor continues to detect paper pass.
Causes: 1 Foreign object at the back of the machine 2 Eject actuator catching on some position 3 Fuser cover installation failure 4 Back cover installation failure 5 Eject sensor failure 6 Back cover failure 7 Eject roller 1 failure 8 Main PCB failure

Code: 7300
Display: Jam Tray Pull the paper tray completely out of the machine and remove the jammed paper
Description: After the paper feed sensor detects paper pass, the registration front sensor does not detect paper pass after a set period of time.
Causes: 1 Foreign object inside machine 2 Paper dust cleaning roller installation failure 3 Registration front actuator that has come off or that has been caught 4 Registration rear actuator that has come off or that has been caught 5 Registration front/rear/manual feed sensor PCB harness connection failure 6 Registration front/rear/manual feed sensor PCB failure 7 Feed roller failure 8 Main PCB failure

Code: 7700
Display: Jam 2-sided Pull the paper tray completely out of the machine. Check inside the machine towards the rear. Or open the Back Cover to remove the jammed paper.
Description: After the first side is printed in 2-sided printing mode, the registration front sensor does not detect paper pass after a set period of time.
Causes: 1 Foreign object inside the duplex path 2 Fuser cover installation failure 3 Back cover installation failure 4 Main PCB failure