• Code: 220
• Description: Laser synchronization detection error: LD0
  The laser synchronizing detection signal for the start position of the LD was not output for two sec. after LDB unit turned on with the polygon motor rotating normally.
• Causes: • Laser synchronizing detection board harness loose or broken. • Laser synchronization detection board defective • LDB unit defective • IPU defective

• Code: 230
• Description: FGATE ON error
  The FGATE signal did not assert within the prescribed time. (The BCU generates the FGATE signal and sends it to the LD unit when the registration sensor switches on.)
• Causes: • BCU, Controller board harness loose or broken • BCU defective • Controller board defective

• Code: 231
• Description: FGATE OFF error
  The FGATE signal did not go off within the prescribed time. (The BCU generates the FGATE signal and sends it to the LD unit when the registration sensor switches on.)
• Causes: • BCU, Controller board harness loose or broken • BCU defective • Controller board defective

• Code: 240
• Description: LD error
  The IPU detected a problem at the LD unit.
• Causes: • LD unit harness broken, defective • BCU harness broken defective • LD unit defective • BCU defective

• Code: 302
• Description: Charge level output error
  The PWM output level was detected higher than 50% after 10 consecutive samplings.
• Causes: • HVPS (High Voltage Power Supply) board harness loose, broken. • PCU connection loose or broken

• Code: 350
• Description: ID sensor calibration – Error 1
  One of the following conditions occurred when the ID sensor pattern was calibrated during printing: Vsp > 2.5V Vsg < 2.5V Vsp = 0V Vsg = 0V
• Causes: • ID sensor defective or dirty • ID sensor harness disconnected or connector is damaged • BCU defective • Scanning system or image creation system malfunction • High voltage power supply board (power pack) defective

• Code: 351
• Description: ID sensor calibration – Error 2
  The following conditions occurred simultaneously when the ID sensor pattern was calibrated during printing: Vsg = 5V PWM = 0 (LED current drop)
• Causes: • ID sensor dirty or defective • ID sensor harness disconnected, or connector damaged • BCU board defective High voltage power supply board (power pack) defective

• Code: 353
• Description: ID sensor LED current error
  Error occurred during automatic adjustment of Vsg:
  • Vsg output did not attain 4V, even with PWM = 1023 (maximum current for LED) • Vsg output was greater than 4V, even with PWM=1 (no current for the LED)
• Causes: • ID sensor dirty or defective • ID sensor harness disconnected, or connector damaged • IOB defective • High voltage power supply board (power pack) defective • Scanning system or image creation system malfunction