• 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 • IPU 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 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 • BCU 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 IOB or main board of peripherals. 3. Replace the BCU if no power is supplied to peripherals.

• 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 • BCU 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 IOB or main board of peripherals. 3. Replace the BCU if no power is supplied to peripherals.

• 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 or disconnected connector
• Remedy: Check the connection between the main machine and paper feed unit.

• 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: 1. Check if the setting of the SP5113 is correctly set. 2. Check the connection between the main machine and optional counter device.

• Code: 633
• Description: Counter device error 2
  After communication is established, the controller receives the brake signal from the accounting device.
• 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: 1. Check if the setting of the SP5113 is correctly set. 2. Check the connection between the main machine and optional counter device.

• 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: Replace the counter device.

• 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: Replace the counter device.