• Code: 321
• Description: F-Gate error: No laser writing signal
  The laser writing signal (F-GATE) does not go to LOW for more than 30 seconds after the copy paper reaches the registration sensor.
• Causes: • BICU board defective • PCI harness between the controller board and the BICU defective or disconnected

• Code: 322
• Description: Synchronization error
  The synchronization signal was not issued within 500 ms after the LD fired while the polygon motor was turning at the prescribed number of revolutions.
• Causes: • Laser synchronization board connectors loose, disconnected, or damaged • Laser synchronization board defective • LD drive board defective

• Code: 323
• Description: LD drive current too high
  The LD drive board applies more than 100 mA to the LD.
• Causes: • LD unit defective (not enough power, due to aging) • Poor connection between the LD unit and the BICU board • BICU defective

• Code: 327
• Description: LD unit home position error 1
  The LD unit home position sensor does not detect an on condition when the LD unit moves to its home position.
• Causes: • HP sensor/harness defective • LD unit home position sensor defective • LD positioning motor harness defective • LD unit movement blocked because of incorrect connector routing

• Code: 328
• Description: LD unit home position error 2
  The LD unit home position sensor does not detect an off condition when the LD unit moves from its home position.
• Causes: • HP sensor/harness defective • LD positioning/harness motor defective • LD unit movement blocked because of incorrect connector routing

• Code: 329
• Description: LD unit beam pitch adjusted incorrectly
  The LD unit HP sensor does not detect the ON condition while changing the LD unit position for correcting the LD position or changing the dpi.
• Causes: • After initialization of the SP modes, SP2-109-3 or SP2-109-4 was not executed. • The harness is blocking the LD drive (PCB), preventing adjustment of the pitch.

• Code: 335
• Description: Polygon motor error 1: On timeout
  The XSCRDY signal did not go LOW (Active) within 10 sec. after the polygon motor was turned on.
• Causes: • Polygon motor drive board I/F harness loose, disconnected, or damaged • Polygon motor drive board defective • Polygon motor defective

• Code: 336
• Description: Polygon motor error 2: Off timeout
  The XSCRDY signal did not go HIGH (Inactive) within 3 sec. after the polygon motor was turned off.
• Causes: • Polygon motor drive board I/F harness loose, disconnected, or damaged • Polygon motor drive board defective • Polygon motor defective