• Code: 8000
• Description: The registration front sensor detected that the paper length was too short when faxing or printing a list or report.
• Causes: 1 Registration front sensor failure. 2 Main PCB failure.
• Remedy: 1 Registration front sensor failure Replace the registration front/rear sensor PCB ASSY. 2 Main PCB failure Replace the main PCB ASSY.

• Code: 8300
• Description: Detected discharge when the number of rotations of the drum has exceeded twice the life limit.
• Causes: 1 High-voltage power supply PCB failure. 2 Main PCB failure.
• Remedy: 1 High-voltage power supply PCB failure Replace the high-voltage power supply PCB ASSY. 2 Main PCB failure Replace the main PCB ASSY.

• Code: 8400
• Description: The eject sensor remains ON (paper pass detected) for more than the specified time even after the registration rear sensor detected the end of paper pass.
• Causes: 1 Foreign object in the rear of the machine. 2 Eject actuator caught in some sections of the machine. 3 Eject sensor failure. 4 Main PCB failure.
• Remedy: 1 Foreign object in the rear of the machine Remove the foreign object. 2 Eject actuator caught in some sections of the machine Reattach the eject actuator. 3 Eject sensor failure Refer to "1.3.10 Check sensor operation (function code: 32)" in Chapter 5 to check the sensor operation. If the sensor operation is faulty, replace the eject sensor PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

• Code: 8500
• Description: The T1 paper feed sensor detected that paper tray 1 was not set.
• Causes: 1 T1 paper feed actuator caught in some sections of the machine. 2 T1 paper feed sensor PCB failure. 3 High-voltage power supply PCB failure. 4 Main PCB failure.
• Remedy: 1 T1 paper feed actuator caught in some sections of the machine Reattach the T1 paper feed actuator. 2 T1 paper feed sensor PCB failure Refer to "1.3.10 Check sensor operation (function code: 32)" in Chapter 5 to check the sensor operation. If the sensor operation is faulty, replace the T1 paper feed sensor PCB ASSY. 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: 8800
• Description: The eject sensor does not detect paper pass after the registration rear sensor detected the end of paper pass.
• Causes: 1 Foreign object inside the machine. 2 Eject actuator caught in some sections of the machine. 3 Eject sensor failure. 4 Main PCB failure.
• Remedy: 1 Foreign object inside the machine Remove the foreign object. 2 Eject actuator caught in some sections of the machine Reattach the eject actuator. 3 Eject sensor failure Refer to "1.3.10 Check sensor operation (function code: 32)" in Chapter 5 to check the sensor operation. If the sensor operation is faulty, replace the eject sensor PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

• Code: 8900
• Description: The registration front sensor detected that the paper fed was smaller than or larger than the specified size in duplex printing mode.
• Causes: 1 Registration front actuator caught in some sections of the machine. 2 Registration front sensor failure. 3 Main PCB failure.
• Remedy: 1 Registration front actuator caught in some sections of the machine Reattach the registration front actuator. 2 Registration front sensor failure Refer to "1.3.10 Check sensor operation (function code: 32)" in Chapter 5 to check the sensor operation. If the sensor operation is faulty, replace the registration front/rear sensor PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: 8A00
• Description: The registration front sensor does not detect paper pass within the specified time after the T1 paper feed sensor detected paper pass.
• Causes: 1 Foreign object in the front of the machine. 2 Registration front actuator caught in some sections of the machine. 3 Connection failure of the registration front/rear sensor harness. 4 Registration front sensor failure. 5 Main PCB failure.
• Remedy: 1 Foreign object in the front of the machine Remove the foreign object. 2 Registration front actuator caught in some sections of the machine Reattach the registration front actuator. 3 Connection failure of the registration front/rear sensor harness Check the connection of the registration front/rear sensor harness, and reconnect it if necessary. 4 Registration front sensor failure Refer to "1.3.10 Check sensor operation (function code: 32)" in Chapter 5 to check the sensor operation. If the sensor operation is faulty, replace the registration front/rear sensor PCB ASSY. 5 Main PCB failure Replace the main PCB ASSY.

• Code: 8B00
• Description: The registration front sensor does not detect paper pass within the specified time after the T2 paper feed sensor detected paper pass.
• Causes: 1 Foreign object in the front of the machine. 2 Registration front actuator caught in some sections of the machine. 3 Connection failure of the registration front/rear sensor harness. 4 Registration front sensor failure. 5 Main PCB failure.
• Remedy: 1 Foreign object in the front of the machine Remove the foreign object. 2 Registration front actuator caught in some sections of the machine Reattach the registration front actuator. 3 Connection failure of the registration front/rear sensor harness Check the connection of the registration front/rear sensor harness, and reconnect it if necessary. 4 Registration front sensor failure Refer to "1.3.10 Check sensor operation (function code: 32)" in Chapter 5 to check the sensor operation. If the sensor operation is faulty, replace the registration front/rear sensor PCB ASSY. 5 Main PCB failure Replace the main PCB ASSY.