• Code: 302
• Description: Charge roller current leak
  A current leak signal for the charge roller is detected.
• Causes: • Charge roller damaged
  • High voltage supply board defective
  • Poor connection of the PCU

• Code: 320
• Description: Polygonal mirror motor error
  The polygon mirror motor does not reach operating speed within 10 seconds after the motor ON signal is sent, or does not turn on within one of the 200 ms check intervals during operation.
• Causes: • Polygon mirror motor defective
  • Poor connection between the polygonal mirror motor driver and the BICU board
  • Damaged cable between BICU and polygonal mirror motor driver
  • BICU board defective

• Code: 321
• Description: No laser writing signal (F-GATE) error
  The laser-writing signal (F-GATE) fails to turn Low after the laser crosses 5 mm on the drum surface from the laser writing start position.
• Causes: • BICU board defective
  • The fax controller or printer controller has a poor connection
  • Fax controller or printer controller defective

• Code: 322
• Description: Laser synchronization error
  The main scan synchronization detector board cannot detect the laser synchronization signal for more than 5 consecutive 100 ms intervals.
• Causes: • Poor connection between the LD unit and the BICU board
  • Damaged cable between BICU and LD unit
  • LD unit out of position
  • LD unit defective
  • BICU board defective

• Code: 390
• Description: TD sensor error
  The TD sensor outputs less than 0.2 V or more than 4.0 V 10 times consecutively during copying.
• Causes: • TD sensor abnormal
  • Poor connection of the PCU

• Code: 391
• Description: Development bias leak
  A development bias leak signal is detected.
• Causes: • Poor connection of the PCU
  • High voltage supply board defective

• Code: 392
• Description: TD sensor initial setting error
  TD sensor initial setting is not performed correctly.
• Causes: • ID sensor defective
  • No developer
  • Drum does not turn
  • Development roller does not turn
  • Poor connection of the PCU
  • The voltage is not applied to charge roller

• Code: 401
• Description: Transfer roller leak error 1
  A current leak signal for the transfer roller is detected. A current feedback signal for the transfer roller is not detected.
• Causes: • High voltage supply board defective
  • Poor connection of the PCU
  • Transfer/separation unit set incorrectly
  • Transfer roller damaged