• Code: 51
• Description: MP paper feeding kit is at the end of life.
• Causes: 1 The part displayed on the LCD reached the end of life. 2 Main PCB failure
• Remedy: 1 The part displayed on the LCD reached the end of life Replace the part displayed on the LCD and reset the counter of each part. (Refer to “2.2 Parts Life Reset Function” in Chapter 5.) 2 Main PCB failure Replace the main PCB ASSY.

• Code: 52
• Description: Paper feeding kit1 is at the end of life.
• Causes: 1 The part displayed on the LCD reached the end of life. 2 Main PCB failure
• Remedy: 1 The part displayed on the LCD reached the end of life Replace the part displayed on the LCD and reset the counter of each part. (Refer to “2.2 Parts Life Reset Function” in Chapter 5.) 2 Main PCB failure Replace the main PCB ASSY.

• Code: 53
• Description: Paper feeding kit2 is at the end of life.
• Causes: 1 The part displayed on the LCD reached the end of life. 2 Main PCB failure
• Remedy: 1 The part displayed on the LCD reached the end of life Replace the part displayed on the LCD and reset the counter of each part. (Refer to “2.2 Parts Life Reset Function” in Chapter 5.) 2 Main PCB failure Replace the main PCB ASSY.

• Code: 54
• Description: Fuser unit is at the end of life.
• Causes: 1 The part displayed on the LCD reached the end of life. 2 Main PCB failure
• Remedy: 1 The part displayed on the LCD reached the end of life Replace the part displayed on the LCD and reset the counter of each part. (Refer to “2.2 Parts Life Reset Function” in Chapter 5.) 2 Main PCB failure Replace the main PCB ASSY.

• Code: 55
• Description: Laser unit is at the end of life.
• Causes: 1 The part displayed on the LCD reached the end of life. 2 Main PCB failure
• Remedy: 1 The part displayed on the LCD reached the end of life Replace the part displayed on the LCD and reset the counter of each part. (Refer to “2.2 Parts Life Reset Function” in Chapter 5.) 2 Main PCB failure Replace the main PCB ASSY.

• Code: 56
• Description: The fuser cover is open.
• Causes: 1 Paper eject actuator catching on some position. 2 Paper eject sensor PCB failure. 3 Main PCB failure
• Remedy: tep Cause Remedy 1 Paper eject actuator catching on some position Correct the position of the paper eject actuator. 2 Paper eject sensor PCB failure Check the sensor performance following the procedure described in “Function code 32”. If any problem occurs, replace the paper eject sensor PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: 57
• Description: Paper is jammed in the duplex paper feed system.
• Causes: 1 Foreign object around paper eject. 2 Foreign object around duplex feed ASSY. 3 Coming off of back flapper ASSY. 4 Duplex feed ASSY not assembled correctly. 5 Duplex paper guide not assembled correctly. 6 Harness connection failure of paper eject ASSY. 7 Paper eject motor failure. 8 Duplex feed ASSY and Duplex paper guide failure. 9 Paper eject ASSY failure. 10 Engine PCB failure. 11 Main PCB failure.
• Remedy: 1 Foreign object around paper eject Remove the foreign object. 2 Foreign object around duplex feed ASSY Remove the foreign object. 3 Coming off of back flapper ASSY Re-assemble the back flapper ASSY. 4 Duplex feed ASSY not assembled correctly Re-assemble the duplex feed ASSY. 5 Duplex paper guide not assembled correctly Re-assemble the duplex paper guide. 6 Harness connection failure of paper eject ASSY Check the harness connection of the paper eject ASSY and reconnect it. 7 Paper eject motor failure Replace the paper eject motor. 8 Duplex feed ASSY and Duplex paper guide failure Replace the paper tray 1. 9 Paper eject ASSY failure Replace the paper eject ASSY. 10 Engine PCB failure Replace the engine PCB ASSY. 11 Main PCB failure Replace the main PCB ASSY.

• Code: 58
• Description: Fuser unit error. (Some kind of fixing error occurs.) (warning)
• Causes: 1 Harness connection failure between fuser unit connector and paper eject sensor PCB ASSY. 2 Harness connection failure between fuser unit connector and low-voltage power supply PCB ASSY. 3 Fuser unit failure. 4 Paper eject sensor PCB failur. 5 Low-voltage power supply PCB failure. 6 Engine PCB failure. 7 Main PCB failure.
• Remedy: 1 Harness connection failure between fuser unit connector and paper eject sensor PCB ASSY Check the harness connection between the fuser unit connector and paper eject sensor PCB ASSY, and reconnect it. 2 Harness connection failure between fuser unit connector and low-voltage power supply PCB ASSY Check the harness connection between the fuser unit connector and low-voltage power supply PCB ASSY, and reconnect it. 3 Fuser unit failure Replace the fuser unit. 4 Paper eject sensor PCB failure Replace the paper eject sensor PCB ASSY. 5 Low-voltage power supply PCB failure Replace the low-voltage power supply PCB ASSY. 6 Engine PCB failure Replace the engine PCB ASSY. 7 Main PCB failure Replace the main PCB ASSY.