• Code: 5005
• Description: Printable pages set for PF kit 4 have reached the upper limit.
• Remedy: 1 End of life of the applicable PF kit Replace the applicable PF kit. Reset counters for consumable parts (function code: 88) to reset the applicable PF kit counter after the replacement. 2 If the error display is not cleared after the applicable PF kit counter has been reset, the main PCB is faulty.

• Code: 5006
• Description: Printable pages set for PF kit 5 have reached the upper limit.
• Remedy: 1 End of life of the applicable PF kit Replace the applicable PF kit. Reset counters for consumable parts (function code: 88) to reset the applicable PF kit counter after the replacement. 2 If the error display is not cleared after the applicable PF kit counter has been reset, the main PCB is faulty.

• Code: 6001
• Description: The front cover sensor detected that the front cover was open.
• Remedy: • Close the front cover. 1 Connection failure of the front cover sensor harness Reconnect the front cover sensor harness. 2 Connection failure of the relay front harness Reconnect the relay front harness. 3 Front cover sensor attachment failure Reattach the front cover sensor. 4 Front cover failure Replace the front cover. 5 Front cover sensor failure Replace the relay front PCB ASSY. 6 Relay front PCB failure Replace the relay front PCB ASSY. 7 Main PCB failure Replace the main PCB ASSY.

• Code: 6004
• Description: The eject sensor detected that the fuser cover was open.
• Remedy: • Close the fuser cover. 1 Eject actuator coming off or caught in some sections of the machine Reattach the eject actuator. 2 Fuser cover attachment failure Reattach the fuser cover. 3 Connection failure of the eject sensor harness Reconnect the eject sensor harness. 4 Eject sensor PCB failure Replace the eject sensor PCB ASSY. 5 Main PCB failure Replace the main PCB ASSY.

• Code: 6101
• Description: The toner amount detection sensor detected that the toner cartridge was not set.
• Remedy: • Set the toner cartridge correctly. 1 Toner amount detection sensor PCB (light reception) failure Replace the toner amount detection sensor PCB ASSY (light reception). 2 Relay front PCB failure Replace the relay front PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: 6200
• Description: Detected that the drum unit was not set by detecting the GRID terminal current.
• Remedy: • Set the drum unit correctly. 1 Dirt on the GRID terminals of the drum unit and those of the machine Clean the CHG and GRID terminals of the drum unit and those of the machine. 2 Dirt on the high-voltage power supply PCB terminal Clean the high-voltage power supply PCB terminal. 3 high-voltage power supply PCB failure Replace the high-voltage power supply PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

• Code: 6801
• Description: The side thermistor of the fuser unit or internal temperature sensor detected a temperature higher than the specified value.
• Remedy: • Lower the room temperature. • Keep the machine away from heating appliances.
  1 Connection failure of the internal temperature sensor harness Reconnect the internal temperature sensor harness. 2 Internal temperature sensor failure Replace the main frame L ASSY. 3 Fuser unit side thermistor failure Replace the fuser unit. 4 Main PCB failure Replace the main PCB ASSY.

• Code: 6901
• Description: An error occurred in the fuser unit when the power switch was turned ON or sleep mode was released.
• Remedy: 1 Connection failure of a fuser unit harness Reconnect the fuser unit harness. 2 Connection failure of the eject sensor harness Reconnect the eject sensor harness. 3 Eject sensor PCB failure Replace the eject sensor PCB ASSY. 4 Fuser unit failure Replace the fuser unit. 5 Low-voltage power supply PCB failure Replace the low-voltage power supply PCB ASSY. 6 Main PCB failure Replace the main PCB ASSY. Note: • Turn OFF the power switch. After the fuser unit has cooled sufficiently, turn ON the power switch again and leave the machine for 15 minutes. This problem may then be cleared. • To release the fuser unit error after taking appropriate measures, enter the maintenance mode once and quit it with the function code 99.