Code :

Code: 31
Description: Density sensor error.
Causes: 1 Harness connection failure of registration mark sensor holder ASSY. 2 Registration mark sensor holder ASSY failure. 3 Main PCB failure
Remedy: 1 Harness connection failure of registration mark sensor holder ASSY Check the harness connection of the registration mark sensor holder ASSY and reconnect it. 2 Registration mark sensor holder ASSY failure Replace the registration mark sensor holder ASSY. 3 Main PCB failure Replace the main PCB ASSY.

Code: 32
Description: Density sensor shutter operation error.
Causes: 1 Foreign object around registration mark sensor shutter. 2 Harness connection failure of registration mark sensor holder ASSY. 3 Harness connection failure of shutter solenoid. 4 High-voltage power supply PCB failure. 5 Registration mark sensor holder ASSY failure. 6 Main PCB failure.
Remedy: 1 Foreign object around registration mark sensor shutter Remove the foreign object. 2 Harness connection failure of registration mark sensor holder ASSY Check the harness connection of the registration mark sensor holder ASSY and reconnect it. 3 Harness connection failure of shutter solenoid Check the harness connection of the shutter solenoid and reconnect it. 4 High-voltage power supply PCB failure Replace the high-voltage power supply PCB ASSY. 5 Registration mark sensor holder ASSY failure Replace the registration mark sensor holder ASSY. 6 Main PCB failure Replace the main PCB ASSY.

Code: 35
Description: Failure in NVRAM of the engine PCB.
Causes: 1 Engine PCB failure. 2 Main PCB failure.
Remedy: 1 Engine PCB failure Replace the engine PCB ASSY. 2 Main PCB failure Replace the main PCB ASSY.

Code: 36
Description: Error in the high-voltage power supply PCB while the machine is in the standby mode.
Causes: 1 Harness connection failure of high-voltage power supply PCB. 2 High-voltage power supply PCB failure. 3 Engine PCB failure. 4 Main PCB failure
Remedy: 1 Harness connection failure of high-voltage power supply PCB Check the harness connection of the high-voltage power supply PCB ASSY and reconnect it. 2 High-voltage power supply PCB failure Replace the high-voltage power supply PCB ASSY. 3 Engine PCB failure Replace the engine PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

Code: 37
Description: Belt unit temperature sensor error.
Causes: 1 Harness connection failure of belt unit temperature sensor. 2 Belt unit temperature sensor failure. 3 Main PCB failure.
Remedy: 1 Harness connection failure of belt unit temperature sensor Check the harness connection of the belt unit temperature sensor and reconnect it. 2 Belt unit temperature sensor failure Replace the registration mark sensor holder ASSY. 3 Main PCB failure Replace the main PCB ASSY.