• Code: 683
• Description: RFID: Unit check error
  The machine gets RFID communication error even the toner cartridges have not been installed in the machine.
• Causes: • Caused by noise
• Remedy: Turn the main power switch off and on.

• Code: 687
• Description: Memory address command error
  The BCU does not receive a memory address command from the controller for the prescribed time after the paper has reached the registration sensor.
• Causes: • Harness disconnection at BCU • Controller board loose or broken • Defective HDD • Defective BCU • Defective controller
• Remedy: 1. Check if the controller is firmly connected to the BCU. 2. Update the firmware of the controller. 3. Replace the HDD. 4. Update the firmware of the BCU. 5. Replace the BCU. 6. Replace the controller.

• Code: 690
• Description: GAVD communication error
  • The I2C bus device ID is not identified during initialization. • A device-status error occurs during I2C bus communication. • The I2C bus communication is not established due to an error other than a buffer shortage.
• Causes: • Loose connection • Defective BCU • Defective LD controller board
• Remedy: 1. Turn the main switch off and on. 2. Check the cable connection. 3. Replace the laser unit. 4. Replace the BCU.

• Code: 816
• Description: Energy saving I/O sub-system error
  The energy saving I/O sub-system detects an error.
• Causes: • Controller board defective
• Remedy: Replace the controller board.

• Code: 819
• Description: Fatal kernel error
  Due to a control error, a RAM overflow occurred during system processing. One of the following messages was displayed on the operation panel.
• Causes: • System program defective • Controller board defective • Optional board defective
• Remedy: Replace controller firmware

• Code: 820
• Description: Self-diagnostics error: CPU [XXXX]: Detailed error code. [0612] CPU error During the self-diagnostic, the controller CPU detects an error. The CPU detects an error and displays the specific error code with the program address where the error occurs.
• Causes: • System firmware problem • Defective controller
• Remedy: 1. Turn the main switch off and on. 2. Reinstall the controller system firmware. 3. Replace the controller. When the problem cannot be fixed with the above procedure, the following information displayed on the screen needs to be fed back to a technical support center. • SC code • Detailed error code • Program address

• Code: 833
• Description: Self-diagnostic error 8: Engine I/F ASIC
• Causes: [0F30] [0F31] • ASIC (Mandolin) for system control could not be detected. After the PCI configuration, the device ID for the ASIC could not be checked. Replace the BCU [0F41] • ASIC (Mandolin) for system control could not be detected. After the PCI configuration, the device ID for the ASIC could not be checked. Replace the BCU [50B1] Could not initialize or read the bus connection. • Check for l[50B2] Value of the SSCG register is incorrect. • Check for loose connections at the mother board. Replace the mother boardoose connections at the mother board. Replace the mother board
• Remedy:

• Code: 853
• Description: Wireless LAN card not detected
  The wireless LAN card is not detected before communication is established, though the wireless LAN board is detected.
• Causes: • Loose connection
• Remedy: Check the connection.