• Code: C4E2
• Description: Fuser belt rotation detection sensor abnormality. The fuser belt does not rotate or does so incorrectly/the abnormality of the sensor of the fuser unit (front/color of harness: yellow)
• Causes: Fuser belt rotation detection sensor Detection plate (rotor) Dirty/damaged Fuser belt Deformed/damaged Bushing of fuser belt drive shaft Worn Bushing of fuser drive unit Worn Drive plate Bend section broken Gear Teeth damaged, worn LGC board Fuser motor
• Remedy: Fuser unit • Fuser belt rotation detection sensor check (Input check: 03-[ALL]OFF/[6]/[A]) • Connector check in the fuser belt rotation sensor • Harness check in the fuser belt rotation sensor • Rotation detection plate (rotor) check • Grease check in the gear (shaft / tooth flank) • Fuser belt check • Check if the bushing of fuser belt drive shaft is worn. • Fuser unit installation check (Check that the levers fixing the fuser unit are lifted up.) Fuser belt rotation detection sensor • Sensor check (Input check: FS-03-[ALL]OFF/[6]/[A]) • Connector check in the fuser belt rotation sensor (CN306, J604) • Harness check in the fuser belt rotation sensor Fuser drive unit • Bushing check • Check that the drive unit is correctly installed (3 dowels). • Check that the drive metal plate is not broken. • Check that the gear is not damaged or worn. • One-way clutch check • Grease check in the gear (shaft / tooth flank) LGC board • Connector check (CN305, CN306) • Board check. Fuser motor • Motor check (Perform the output check: FS-03-113/163) • Connector check (CN305, J603) • Harness check

• 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. (CN122, J12, CN71) • Check if the conductor pattern on the RADF board is short circuited or open circuited. • Connector check SYS board • Check if the conductor pattern on the SYS board is short circuited or open circuited. • Connector check

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

• Code: C560
• Description: • Communication error between Engine-CPUs • Communication error between LGC-PFU
• Causes: LGC board PFC board Harness
• Remedy: LGC board • Turn the power OFF and then back ON using the main power switch. • Connector check (CN323) • Check if the conductor pattern on the LGC board is open circuited or short circuited. • Check if the harness between LGC-PFC has any scratch on it or is open circuited or caught anywhere. • If the same error occurs again, replace the LGC board. PFC board • Connector check (CN452) • Check if the conductor pattern on the PFC board is open circuited or short circuited. • Check if the harness between LGC-PFC has any scratch on it or is open circuited or caught anywhere. • If the same error occurs again, replace the PFC board.

• Code: C580
• Description: Communication error between LGC board and finisher
• Causes: Finisher
• Remedy: 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 (25/30/35ppm: IC63, 45/50ppm: IC12) • Board check

• Code: C5A1
• Description: EEPROM data abnormality (LGC board)
• Causes: EEPROM LGC board
• Remedy: EEPROM EEPROM check LGC board • IC socket check (25/30/35ppm: IC63, 45/50ppm: IC12) • 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