• Code: 314
• Description: Potential sensor calibration error 4
  During drum potential sensor calibration when adjusting the drum potential (VH) for LD power adjustment, the first time the VH pattern is made, the drum potential sensor detects that VH is more than 500V: VH > |–500 + VL + 130| V
• Causes: • Potential sensor defective
  • Potential sensor harness disconnected
  • Potential sensor connector defective or disconnected
  • IOB defective
  • OPC connector defective
  • LD defective

• Code: 315
• Description: Potential sensor calibration error 5
  During drum potential sensor calibration, when –100V is applied to the drum, the output value is out of the prescribed range
• Causes: • Potential sensor defective
  • Potential sensor harness disconnected
  • Potential sensor connector defective or disconnected
  • IOB defective
  • OPC connector defective
  • Development power pack defectiv

• Code: 316
• Description: Potential sensor calibration error 6
  During drum potential sensor calibration, when –800V is applied to the drum, the output value is out of the prescribed range.
• Causes: • Potential sensor defective
  • Potential sensor harness disconnected
  • Potential sensor connector defective or disconnected
  • IOB defective
  • OPC connector defective
  • Development power pack defective

• Code: 317
• Description: Potential sensor calibration error 7
  During drum potential sensor calibration, when VL is adjusted, the pattern surface potential VL pattern is not within range 0V ~ –400V. (VL is the potential after exposing a white pattern.)
• Causes: • Potential sensor defective
  • Potential sensor harness disconnected
  • Potential sensor connector defective or disconnected
  • IOB defective
  • OPC connector defective
  • Charge corona power pack defective
  • Development power pack defective

• Code: 321
• Description: F-GATE error
  The laser writing signal (F-GATE) for the IPU does not go LOW within 60 s.
• Causes: • BICU board defective
  • PCI bus between controller board, BICU board defective

• Code: 322
• Description: Laser synchronization detector error
  After the polygon motor reaches standard rotation speed and the LD unit fires for 500 ms, the laser synchronization detector does not generate a signal
• Causes: • Harness between detector and I/F disconnected or damaged
  • Detector is installed incorrectly
  • Detector board is defective
  • IPU board defective

• Code: 335
• Description: Polygon mirror motor error 1
  The ready signal does not go low within 20 s after the polygon mirror motor turns on or changes speed.
• Causes: • Harness between I/F and polygon motor disconnected or defective
  • Polygon motor or polygon motor driver defective
  • IPU board defective

• Code: 336
• Description: Polygon mirror motor error 2
  The ready signal does not go high within 20 s after the polygonal mirror motor turns off.
• Causes: • Harness between I/F and polygon motor disconnected or defective
  • Polygon motor or polygon motor driver defective
  • IPU board defective