• Code: 641
• Description: Engine-to-controller response error
  The controller has sent a frame with the RAPI protocol, but the engine does not respond.
• Causes: • Defective controller board • External noise

• Code: 670
• Description: Engine startup error
  Just after the main power is turned on or the machine is recovering from auto off mode, the engine ready signal assertion fails. Just after the main power is turned on, the engine does not respond.
• Causes: • Defective BICU • Defective controller board

• Code: 672
• Description: Controller-to-operation panel communication error at startup
  After powering on the machine, communication between the controller and operation panel does not begin, or the communication is interrupted after a normal startup.
• Causes: • Controller stalled • Controller board installed incorrectly • Defective controller board • Operation panel connector loose or defective • Poor connection of DIMM and optional boards on the controller board

• Code: 685
• Description: SBU/IPU communication error
  While data is sent between the scanner and BICU board, a communication error has occurred.
• Causes: • Defective scanner unit cable • Defective SBU board • Defective BICU board

• Code: 687
• Description: PER command error
  Some image data is transferred. The controller does not report the necessary memory address.
• Causes: • Poor connection between BICU and controller • Defective BICU • Defective controller

• Code: 720
• Description: Finisher jogger motor error (500-sheet finisher)
  • The finisher jogger H.P sensor remains de-activated for a certain time when returning to home position. • The finisher jogger H.P sensor remains activated for a certain time when moving away from home position.
• Causes: • Jogger HP sensor defective • Jogger motor defective • Defective finisher control board • Defective BICU • Defective IOB • Incorrect installation

• Code: 722
• Description: Finisher jogger motor error (1000-sheet finisher)
  The finisher jogger H.P sensor remains de-activated for a certain time when returning to home position. The finisher jogger H.P sensor remains activated for a certain time when moving away from home position.
• Causes: • Jogger HP sensor defective • Jogger motor defective • Defective finisher control board • Defective BICU • Defective IOB • Incorrect installation

• Code: 724
• Description: Finisher staple hammer motor error (1000-sheet finisher)
  Stapling hammer motor jam is detected consecutively twice after the staple hammer motor turned on.
• Causes: • Staple jam • Stapler overload caused by trying to staple too many sheets • Staple hammer motor defective • Stapler home position sensor defective • Defective finisher control board • Defective BICU • Defective IOB • Incorrect installation