• Code: 672
• Description: Controller-to-operation panel communication error at startup
  After powering on the machine, the communication circuit between the controller and the operation panel is not opened, or communication with controller is interrupted after a normal startup.
• Causes: • Controller stall • Controller board installed incorrectly • Controller board defective • Operation panel connector loose or defective
• Remedy: 1. Check the harness connection. 2. Replace the controller board.

• Code: 681
• Description: RFID: Communication error
  • Communication error occurs when the RFID starts to communicate with the RFID receptor. • Retry of RFID communication fails three times after the machine has detected the RFID communication error.
• Causes: • Defective RFID reader and writer • Disconnected ASAP I/F • No memory chip on the toner cartridge • Noise
• Remedy: 1. Replace the RFID controller board. 2. Replace the toner cartridge.

• Code: 682
• Description: Memory chip at TD sensor: Communication error
  Retry of memory chip communication fails three times after the machine has detected the memory chip communication error.
• Causes: • Damaged memory chip data • Disconnected inter face • No memory chip on the development unit • Noise
• Remedy: 1. Replace the BICU.

• 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: 1. Turn the main power switch off and on.

• Code: 687
• Description: Memory address command error
  The BICU does not receive a memory address command from the controller 120 seconds after paper is in the position for registration.
• Causes: • Loose connection • Defective controller • Defective BICU
• Remedy: 1. Check if the controller is firmly connected to the BICU. 2. Replace the controller. 3. Replace the BICU.

• 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 BICU • Defective LD controller board
• Remedy: 1. Turn the main switch off and on. 2. Check the cable connection. 3. Replace the laser optics-housing unit. 4. Replace the BICU board.

• Code: 700
• Description: Original stopper HP error
  When the pick-up motor turns on clockwise, the original stopper HP sensor does not detect the home position of the original stopper.
• Causes: • Defective original stopper HP sensor • Defective pick-up motor • Defective DF drive board
• Remedy: 1. Replace the DF drive board if the pick-up motor does not work correctly. 2. Replace the pick-up motor. 3. Replace the original stopper HP sensor.

• Code: 701
• Description: Pick-up roller HP error
  When the pick-up motor turns on counterclockwise, the pick-up roller HP sensor does not detect the home position of the pick-up roller.
• Causes: • Defective pick-up roller HP sensor • Defective pick-up motor • Defective DF drive board
• Remedy: 1. Replace the DF drive board if the pick-up motor does not work correctly. 2. Replace the pick-up motor. 3. Replace the pick-up roller HP sensor.