• Code: C550
• Description: RADF I/F error
• Causes: RADF board SYS board
• Remedy: RADF board • Check if the harness connecting the RADF board and SYS board is disconnected or open circuited. • Check if the conductor pattern on the RADF board is short circuited or open circuited. SYS board Check if the conductor pattern on the SYS board is short circuited or open circuited.

• Code: C551
• Description: Incorrect RADF installed to the equipment
• Causes: RADF
• Remedy: • Replace the RADF with the correct one.

• Code: C560
• Description: Communication error between Engine-CPUs. • Communication error between Engine-CPUs • Communication error between LGC-PFC
• Causes: LGC board PFU board
• Remedy: Harness • Connector check • Harness check LGC board • Connector check (CN368) • Board check PFU board • Connector check (CN920) • Board check

• Code: C580
• Description: Communication error between LGC board and finisher
• Causes: Finisher control PC board (FIN)
• Remedy: Finisher Check if the specified finisher is attached.

• Code: C5A0
• Description: EEPROM abnormality (LGC board)
• Causes: EEPROM LGC board
• Remedy: EEPROM EEPROM check LGC board • IC socket check (IC26) • Board check

• Code: C5A1
• Description: EEPROM data abnormality (LGC board)
• Causes: EEPROM LGC board
• Remedy: EEPROM EEPROM check LGC board • IC socket check (IC26) • Board check

• Code: C8E0
• Description: RADF communication protocol abnormality. The system has to be stopped because the control abnormality occurred.
• Causes: RADF board
• Remedy: Power • Turn the power OFF and then back ON to check if the equipment operates normally. RADF board • Connector check Board check

• Code: C900
• Description: Connection error between the SYS board and the LGC board
• Causes: LGC board If the problem is not corrected with the replacement of the LGC board, reinstall the removed LGC board and replace the SYS board. SYS board. Harness (Flat cable)
• Remedy: LGC board • Connector check (CN370) • Board check SYS board • Connector check (CN132) • Board check Harness • Connector check • Harness check