• Code: 623
• Description: 2nd Paper Bank communication error
  This SC is not issued for this machine. When a communication error signal between the 1st paper bank and 2nd paper bank is received.
• Causes: • Loose connector • Defective controller of the MF accounting device • Battery error

• Code: 641
• Description: BCU communication error
  The BCU does not respond to the frame transmitted from the controller.
• Causes: • Defective controller • Detective BCU

• Code: 669
• Description: EEPROM error
  Retry of EEPROM communication fails three times after the machine has detected the EEPROM error.
• Causes: • Caused by noise

• Code: 670
• Description: Engine startup error
  The BCU fails to respond with the prescribed time when the machine is turned on.
• Causes: • Connections between BCU and controller board are loose, disconnected, or damaged 1. Replace the BCU 2. Replace the controller board

• Code: 671
• Description: BCU error
  The model code from the BCU is not correct when the machine is turned on.
• Causes: Install the correct BCU for this model.

• Code: 687
• Description: Memory address (PER) 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 BCU • Defective Controller Board

• Code: 721
• Description: Finisher jogger motor error this model.
  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

• Code: 723
• Description: Stack feed-out motor error
  • The stack feed-out HP sensor does not detect the home position of the stack feed-out belt 3000ms after the stack feed-out belt has moved to its home position. • The stack feed-out HP sensor does not turn off 200 ms after the stack feed-out belt has moved from its home position. The 1st detection failure causes a jam error, and the 2nd failure causes this SC code.
• Causes: • Defective stack feed-out HP sensor • Overload on the stack feed-out motor • Defective stack feed-out motor • Defective main board • Disconnected or defective harness