• 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 development unit. 2. Replace the PCDU.

• 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 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 BCU. 2. Update the firmware of the i-controller. 3. Replace the HDD. 4. Update the firmware of the BCU. 5. Replace the BCU. 6. Replace the i-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 BICU • 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 board.

• Code: 730
• Description: Shift tray motor error
  The shift tray HP sensor does not activate within 1.86 seconds after the shift tray motor starts to move at power on or copying. The 1st detection failure issues a jam error, and the 2nd failure issues this SC code.
• Causes: • Defective shift tray motor • Defective shift tray HP sensor.
• Remedy: Replace the shift tray motor.

• Code: 740
• Description: Finisher stapler motor error (D038/D041)
  The 1st detection failure issues a jam error, and the 2nd failure issues this SC code.
• Causes: • Staple jam • Motor overload • Defective stapler motor • Defective stapler safety sensor
• Remedy: 1. Check the connections and cables for the components mentioned above. 2. Replace the stapler unit 3. Replace the finisher main board.

• Code: 742
• Description: Finisher stapler movement motor error (D038/D041)
• Causes: • Motor overload • Loose connection of the stapler unit HP sensor • Loose connection of the stapler unit movement motor • Defective stapler unit HP sensor • Defective stapler movement motor
• Remedy: 1. Check the connection of the stapler movement motor. 2. Check the connection of the stapler unit HP sensor. 3. Replace the stapler unit HP sensor. 4. Replace the stapler unit movement motor.

• Code: 750
• Description: Tray lift motor error (D038/D041)
• Causes: • Motor overload • Loose connection of the tray lift motor • Defective tray lift motor
• Remedy: 1. Check the connections to the tray lift motor. 2. Replace the tray lift motor.