• Code: C550, C780
• Description: RADF I/F error: Communication error has occurred between the RADF and the scanner.
• Remedy: (1) Check if the harness connecting the RADF board and SLG board is disconnected or open circuited. (2) Check if the conductor pattern on the RADF board is short circuited or open circuited. (3) Check if the conductor pattern on the SLG board is short circuited or open circuited. (4) Replace the RADF board. (5) Replace the SLG board.

• Code: C570
• Description: Communication error between Engine-CPU and IPC board
• Remedy: (1) Check if the LGC board and IPC board are connected properly. (2) Check if the conductor pattern on the IPC board is short circuited or open circuited. (3) Check if the conductor pattern on the LGC board is short circuited or open circuited. (4) Replace the IPC board. (5) Replace the LGC board.

• Code: C580
• Description: Communication error between IPC board and finisher
• Remedy: (1) Check if the specified finisher is attached. (2) Check if the harness connecting the IPC board and the finisher controller PC board is disconnected or open circuited. (3) Check if the conductor pattern on the IPC board is short circuited or open circuited. (4) Check if the conductor pattern on the finisher controller PC board is short circuited or open circuited. (5) Replace the IPC board. (6) Replace the finisher controller PC board.

• Code: C730
• Description: EEPROM initialization error: EEPROM is not initialized normally when performing the code 05-356.
• Remedy: (1) Check the RADF board, mainly IC12, for short circuits and open circuits. (2) Replace the RADF board.

• Code: C740
• Description: Reverse sensor adjustment error
• Remedy: (1) Check if there is any foreign matter between the reverse sensor and the reflecting mirror. Check if the reflecting mirror is dirty. (2) Check if the harness connecting the reverse sensor and the RADF board is open circuited. (3) Check the circuits and connectors on the RADF board, mainly IC3, IC4 and CN4, for short circuits and open circuits. (4) Replace the reverse sensor. (5) Replace the RADF board.

• Code: C810
• Description: Fan motor abnormality: The fan motor is not rotating normally.
• Remedy: (1) Check if the load on the motor shaft is normal. (2) Remove foreign matters. (3) Check if the harness connecting the fan motor and RADF board is open circuited. (4) Check if the power is supplied to the pin 1 of the CN9 on the RADF board during the operation. (5) Check the circuits and connectors on the RADF board, mainly Q12 and Q16, for short circuits and open circuits. (6) Replace the fan motor. (7) Replace the RADF board.

• Code: C820
• Description: Read sensor adjustment error: The read sensor cannot be adjusted normally when performing the code 05-356.
• Remedy: (1) Check if there is any foreign matter between the read sensor and the reflecting mirror. Check if the reflecting mirror is dirty. (2) Check if the harness connecting the read sensor and the RADF board is open circuited. (3) Check the circuits and connectors on the RADF board, mainly IC3, IC4 and CN6, for short circuits and open circuits. (4) Replace the read sensor. (5) Replace the RADF board.

• Code: C830
• Description: Original length sensor adjustment error: The original length sensor cannot be adjusted normally when performing the code 05-356.
• Remedy: (1) Check if there is any foreign matter between the original length sensor and reflecting mirror. Check if the reflecting mirror is dirty. (2) Check if the harness connecting the original length sensor and the RADF board is open circuited. (3) Check the circuits and connectors on the RADF board, mainly IC3, IC4 and CN3, for short circuits and open circuits. (4) Replace the original length sensor. (5) Replace the RADF board.