• Code: 220
• Description: Laser synchronizing detection error
  When the laser synchronizing detection is ON
• Causes: • Disconnected or defective I/F harness to laser unit. • The laser fails to reach the photo detector. • Defective laser unit • Defective BICU

• Code: 230
• Description: FGATE ON error
  When processing the image
• Causes: • Disconnected or defective connector between BICU and controller board • Disconnected or defective harness between BICU and laser unit

• Code: 231
• Description: FGATE OFF error
  When processing the image
• Causes: • Defective BICU • Disconnected or defective connector between BICU and controller board

• Code: 240
• Description: LD error
  The LD driver's error signal is detected after LD initialization.
• Causes: • Worn-out LD • Disconnected or broken harness of the LD • Defective LD drive component • Defective laser unit

• Code: 270
• Description: GAVD communication error
  Energy saver mode was turned off during main power is ON.
• Causes: • Defective BICU

• 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 • 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 • Poor connection between the polygonal mirror motor driver and the BICU board • Damaged cable between BICU and polygonal mirror motor driver • BICU board

• 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 • The fax controller or printer controller has a poor connection • Fax controller or printer controller