• 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 PCDU. 2. Replace the BCU.

• 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 120 seconds after paper is in the position for registration.
• Causes: • Loose connection • Defective controller • Defective BCU
• Remedy: 1. Check if the controller is firmly connected to the BCU. 2. Replace the controller. 3. Replace the BCU.

• 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 optics-housing unit. 4. Replace the BCU board.

• Code: 721
• Description: Finisher jogger motor error
  The jogger fences move out of the home position but the HP sensor output does not change within the specified number of pulses. The 1st failure issues an original jam message, and the 2nd failure issues this SC code.
• Causes: • Jogger HP sensor disconnected, defective • Jogger motor disconnected, defective • Jogger motor overloaded due to obstruction • Finisher main board and jogger motor
• Remedy: 1. Check the connections and cables for the components mentioned above. 2. Check for blockages in the jogger motor mechanism. 3. Replace the jogger HP sensor and/or jogger motor. 4. Replace the finisher main board.

• Code: 725
• Description: Finisher exit guide plate motor error (with the side tray installed)
  After moving away from the guide plate position sensor, the exit guide is not detected at the home position within the prescribed time. The 1st detection failure issues a jam error, and the 2nd failure issues this SC code.
• Causes: • Guide plate motor disconnected, defective • Guide plate motor overloaded due to obstruction • Guide plate position sensor disconnected, defective
• Remedy: 1. Check the connections and cables for the components mentioned above. 2. Check for blockages in the guide plate motor mechanism. 3. Replace the guide plate position sensor and/or guide plate motor 4. Replace the finisher main board.

• Code: 730
• Description: Finisher tray shift motor error (with the side tray installed)
  The shift roller HP sensor of the upper tray does not activate within the prescribed time after the shift tray starts to move toward or away from the home position. The 1st detection failure issues a jam error, and the 2nd failure issues this SC code.
• Causes: • Shift tray HP sensor of the upper tray disconnected, defective • Shift tray motor of the upper tray is disconnected, defective • Shift tray motor of the upper tray overloaded due to obstruction
• Remedy: 1. Check the connections and cables for the components mentioned above. 2. Check for blockages in shift motor mechanism. 3. Replace the shift tray HP sensor and/or shift motor 4. Replace the finisher main board.

• Code: 740
• Description: Finisher corner stapler motor error
  The 1st detection failure issues a jam error, and the 2nd failure issues this SC code. For internal finisher • The stapler motor does not switch off within the prescribed time after operating. • The HP sensor of the staple unit does not detect the home position after the staple unit moves to its home position. • The HP sensor of the staple unit detects the home position after the staple unit moves from its home position.
• Causes: • Staple jam • Motor overload • Defective stapler motor
• Remedy: 1. Check the connections and cables for the components mentioned above. 2. Replace the HP sensor and/or stapler motor 3. Replace the finisher main board.