• Code: 670
• Description: Engine response error
  After powering on the machine, a response is not received from the engine within 30 seconds.
• Causes: • BCU installed incorrectly • BCU defective • Controller board defective
• Remedy: 1. Install the BCU correctly. 2. Replace the BCU. 3. Replace the controller board.

• Code: 671
• Description: Engine board mismatch error
  Engine board and controller mismatch detected.
• Causes: • Wrong engine board installed. • Wrong controller board installed. • Check the type of engine board and controller board.
• Remedy: 1. Replace the BCU. 2. Replace the controller board.

• 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 stalled • 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: 674
• Description: Transmission error in controller board
  Video transmission error is detected in the controller board.
• Causes: -01 M2P error M2P error is occurred during transmitting the video data to the ASIC. • Defective Controller Board 1. Turn the main switch off and on. 2. Replace the controller board. -02 PCI error ASIC could not access to the PCI. • Defective Controller Board 1. Turn the main switch off and on. 2. Replace the controller board.
• Remedy:

• Code: 687
• Description: Memory address (PER) command error
  The BCU did not receive a memory address command from the controller with the prescribed time once the paper reached the registration sensor.
• Causes: • Harness connection at BCU, Controller board loose or broken • Defective HDD • Defective BCU • Defective Controller Board
• Remedy: 1. Check if the controller board is firmly connected to the BCU. 2. Replace the controller board. 3. Replace the HDD 4. 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: 720
• Description: Upper transport motor error
  The upper transport motor in the finisher is not operating.
• Causes: • Upper transport motor drive is obstructed (jammed paper, paper scraps, etc.) • The motor harness loose or broken • Upper transport motor defective
• Remedy: 1. Check for blockages in the upper transport motor mechanism. 2. Replace the upper transport motor. 3. Replace the finisher main board.

• Code: 721
• Description: Front fence motor error
  The jogger fence motor in the finisher is not operating.
• Causes: • Jogger motor drive is obstructed (jammed paper, paper scraps, etc.) • The motor harness loose or broken • Jogger fence HP sensor dirty, loose, defective • Jogger fence motor defective
• Remedy: 1. Check the connections and cables for the components mentioned above. 2. Check for blockages in the jogger fence motor mechanism. 3. Replace the jogger fence HP sensor and/or jogger motor. 4. Replace the finisher main board.