• Code: 220-01
• Description: Laser synchronizing detection error: start position [K]: LD1
  The laser synchronizing detection signal for the start position of the LDB [K], [C], [M], [Y] is not output for 600 ms after LDB unit turned on while the polygon motor is rotating normally.
• Causes: Disconnected or defective I/F harness to laser synchronizing detection unit. Defective laser synchronizing detection unit. The laser fails to reach the photo detector. Defective GAVD. Defective LD board or driver. Defective BCU.
• Remedy: • Turn the main power switch off and on. • Replace the laser optics housing unit. • Replace the I/F harness. • Replace the BCU.

• Code: 220-02
• Description: Laser synchronizing detection error: start position [C]: LD1
  The laser synchronizing detection signal for the start position of the LDB [K], [C], [M], [Y] is not output for 600 ms after LDB unit turned on while the polygon motor is rotating normally.
• Causes: Disconnected or defective I/F harness to laser synchronizing detection unit. Defective laser synchronizing detection unit. The laser fails to reach the photo detector. Defective GAVD. Defective LD board or driver. Defective BCU.
• Remedy: • Turn the main power switch off and on. • Replace the laser optics housing unit. • Replace the I/F harness. • Replace the BCU.

• Code: 220-03
• Description: Laser synchronizing detection error: start position [M]: LD1
  The laser synchronizing detection signal for the start position of the LDB [K], [C], [M], [Y] is not output for 600 ms after LDB unit turned on while the polygon motor is rotating normally.
• Causes: Disconnected or defective I/F harness to laser synchronizing detection unit. Defective laser synchronizing detection unit. The laser fails to reach the photo detector. Defective GAVD. Defective LD board or driver. Defective BCU.
• Remedy: • Turn the main power switch off and on. • Replace the laser optics housing unit. • Replace the I/F harness. • Replace the BCU.

• Code: 220-04
• Description: Laser synchronizing detection error: start position [Y]: LD1
  The laser synchronizing detection signal for the start position of the LDB [K], [C], [M], [Y] is not output for 600 ms after LDB unit turned on while the polygon motor is rotating normally.
• Causes: Disconnected or defective I/F harness to laser synchronizing detection unit. Defective laser synchronizing detection unit. The laser fails to reach the photo detector. Defective GAVD. Defective LD board or driver. Defective BCU.
• Remedy: • Turn the main power switch off and on. • Replace the laser optics housing unit. • Replace the I/F harness. • Replace the BCU.

• Code: 221-01
• Description: Laser synchronizing detection error: start position [K]: LD2
  The laser synchronizing detection signal for the start position of the LDB [K], [C], [M], [Y] is not output for 600 ms after LDB unit turns on while the polygon motor is rotating normally.
• Causes: The laser fails to reach the photo detector. Defective GAVD. Defective LD driver. Defective LDB. Defective BCU.
• Remedy: • Turn the main power switch off and on. • Replace the laser optics housing unit. • Replace the BCU.

• Code: 221-02
• Description: Laser synchronizing detection error: start position [C]: LD2
  The laser synchronizing detection signal for the start position of the LDB [K], [C], [M], [Y] is not output for 600 ms after LDB unit turns on while the polygon motor is rotating normally.
• Causes: The laser fails to reach the photo detector. Defective GAVD. Defective LD driver. Defective LDB. Defective BCU.
• Remedy: • Turn the main power switch off and on. • Replace the laser optics housing unit. • Replace the BCU.

• Code: 221-03
• Description: Laser synchronizing detection error: start position [M]: LD2
  The laser synchronizing detection signal for the start position of the LDB [K], [C], [M], [Y] is not output for 600 ms after LDB unit turns on while the polygon motor is rotating normally.
• Causes: The laser fails to reach the photo detector. Defective GAVD. Defective LD driver. Defective LDB. Defective BCU.
• Remedy: • Turn the main power switch off and on. • Replace the laser optics housing unit. • Replace the BCU.

• Code: 221-04
• Description: Laser synchronizing detection error: start position [Y]: LD2
  The laser synchronizing detection signal for the start position of the LDB [K], [C], [M], [Y] is not output for 600 ms after LDB unit turns on while the polygon motor is rotating normally.
• Causes: The laser fails to reach the photo detector. Defective GAVD. Defective LD driver. Defective LDB. Defective BCU.
• Remedy: • Turn the main power switch off and on. • Replace the laser optics housing unit. • Replace the BCU.