• Code: 564
• Description: Pressure roller overheat 3 (hardware error)
  The pressure roller thermistor (center) detects 250°C or more.
• Causes: • Defective PSU • Defective BCU • Defective pressure roller thermistor (center) • Defective fusing control system
• Remedy: 1. Replace the PSU. 2. Replace the BCU.

• Code: 571
• Description: Pressure roller thermister error 4
  The temperature measured by the pressure roller thermistor (end) does not reach 0 °C for 45 seconds.
• Causes: • Loose connection of pressure roller thermistor (end) • Defective pressure roller thermistor (end)
• Remedy: 1. Check that the pressure roller thermistor (end) is firmly connected. 2. Replace the pressure roller thermistor (end).

• Code: 573
• Description: Pressure roller overheat 4 (software error)
  The detected pressure roller temperature stays at 230°C or more for 1 second.
• Causes: • Defective PSU • Defective BCU
• Remedy: 1. Replace the PSU. 2. Replace the BCU.

• Code: 574
• Description: Pressure roller overheat 4 (hardware error)
  The pressure roller thermistor (end) detects 250°C or more.
• Causes: • Defective PSU • Defective BCU • Defective fusing control system
• Remedy: 1. Replace the PSU. 2. Replace the BCU.

• Code: 610
• Description: Mechanical counter error: K
  This SC is only for NA models. The machine detects the mechanical counter error when SP5987-001 is set to "1".
• Causes: • Disconnected mechanical counter • Defective mechanical counter
• Remedy: 1. Check or replace the mechanical counter. 2. Replace the BCU.

• Code: 611
• Description: Mechanical counter error: FC
  This SC is only for NA models. The machine detects the mechanical counter error when SP5987-001 is set to "1".
• Causes: • Disconnected mechanical counter • Defective mechanical counter
• Remedy: 1. Check or replace the mechanical counter. 2. Replace the BCU.

• Code: 620
• Description: ARDF communication error
  After the ARDF is detected, the break signal occurs or communication timeout occurs.
• Causes: • Incorrect installation of ARDF • ARDF defective • BICU board defective • External noise
• Remedy: 1. Check the cable connection of the ARDF. 2. Shut out the external noise. 3. Replace the ARDF. 4. Replace the IPU.

• Code: 621
• Description: Finisher communication error
  While the IOB communicates with an optional unit, an SC code is displayed if one of following conditions occurs. • The IOB receives the break signal which is generated by the peripherals only just after the main switch is turned on. • When the IOB does not receive an OK signal from a peripheral 100ms after sending a command to it. The IOB resends the command. The IOB does not receive an OK signal after sending the command 3 times.
• Causes: • Cable problems • IOB problems • BICU problems • PSU problems in the machine • Main board problems in the peripherals
• Remedy: 1. Check if the cables of peripherals are correctly connected. 2. Replace the PSU if no power is supplied to peripherals. 3. Replace the main board of peripherals. 4. Replace the BCU.