• Code: EC70
• Description: Inserter transport stop jam-1
• Remedy: Is the transport roller tainted? → YES . Clean up the roller. NO Is the harness between the inserter control board and transport sensor is open-circuited? → YES . Replace the harness. NO Is the transport sensor working impropely? → YES . Replace the transport sensor. NO Replace the inserter control board.

• Code: EC80
• Description: Inserter transport delay jam-2
• Remedy: Is the transport roller tainted? → YES . Clean up the roller. NO Is the harness between the inserter control board and transport sensor is open-circuited? → YES . Replace the harness. NO Is the transport sensor working impropely? → YES . Replace the transport sensor. NO Replace the inserter control board.

• Code: EC90
• Description: Inserter transport stop jam-2
• Remedy: Is the transport roller tainted? → YES . Clean up the roller. NO Is the harness between the inserter control board and transport sensor is open-circuited? → YES . Replace the harness. NO Is the transport sensor working impropely? → YES . Replace the transport sensor. NO Replace the inserter control board.

• Code: ECA0
• Description: Paper remaining in Inserter Unit at power-ON
• Remedy: Is there any paper remaining at the inserter transport path? → YES . Remove the paper. NO Are the separation sensor, reverse path sensor and transport sensor working improperly? → YES . Replace the sensors. NO Replace the inserter control board.

• Code: ECB0
• Description: Incorrect setting of paper size for Inserter Unit
• Remedy: Is the paper size on the inserter tray consist with the size set at the copier control panel? → NO . Set the same paper size as that on the tray. YES Is the separation sensor working improperly? → YES . Replace the separation sensor. NO Perform the width adjustment of the inserter tray side guide.

• Code: ECC0
• Description: Inserter Unit misfeeding
• Remedy: Is the condition improved when the copier power switch is turned OFF/ON? → NO 1) Replace the copier LGC board. 2) Replace the IPC board. 3) Replace the inserter control board.

• Code: ECD0
• Description: Inserter Unit door open jam
• Remedy: Is the problem solved by opening the inserter jam access cover? → NO 1) Check the installation state of the cover. 2) Replace the cover switch and plate spring.

• Code: F070
• Description: Communication error between System-CPU and Engine-CPU
• Remedy: (1) Check if the connector CN102, CN103 on the SYS board is disconnected. (2) Check if the connector CN10 on the SLG board is disconnected. (3) Check if the harness connecting the SYS board and SLG board is disconnected or open circuited. (4) Check if the harness connecting the SYS board and LGC board is disconnected or open circuited. (5) Check the version of the system ROM on the SYS board. (6) Check the version of the engine ROM version on the LGC board. (7) Check the version of the scanner ROM version on the SLG board. (8) Replace the SYS board. (9) Replace the SLG board. (10) Replace the LGC board.