• 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 BICU board.

• 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 IOB or main board of peripherals. 4. Replace the BICU.

• Code: 622
• Description: Paper tray unit 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 IOB or main board of peripherals. 4. Replace the BICU.

• Code: 623
• Description: 2nd Paper Bank communication error
  This SC is not issued for this machine. When a communication error signal between the 1st paper bank and 2nd paper bank is received.
• Causes: • Loose connector
• Remedy:

• Code: 632
• Description: Counter device error 1
  After 3 attempts to send a data frame to the optional counter device via the serial communication line, no ACK signal was received within 100 ms.
• Causes: • Serial line between the optional counter device, the relay board and copier control board is disconnected or damaged • Make sure that SP5113 is set to enable the optional counter device.
• Remedy:

• Code: 633
• Description: Counter device error 2
  After 3 attempts to send a data frame to the optional counter device via the serial communication line, no ACK signal was received within 100 ms.
• Causes: • Serial line between the optional counter device, the relay board and copier control board is disconnected or damaged • Make sure that SP5113 is set to enable the optional counter device.
• Remedy:

• Code: 634
• Description: Counter device error 3
  A backup RAM error was returned by the counter device.
• Causes: • Counter device control board defective • Backup battery of counter device defective
• Remedy:

• Code: 635
• Description: Counter device error 4
  A backup battery error was returned by the counter device.
• Causes: • Counter device control board defective • Backup battery of counter device defective
• Remedy: