• Code: 4103
• Description: BD initialization error M
  After polygon motor M is driven, the BD signal is not detected for 1 s.
• Remedy: PD PWB M (LSU): 1. Confirm that the FCC wiring connector is not distorted and connect the FCC wiring all the way in. Laser scanner unit and LSU relay PWB (YC8) LSU relay PWB (YC3) and Engine PWB (YC12) 2. If the FCC wiring is disconnected, replace the FCC wiring. 3. Replace the laser scanner unit.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 4104
• Description: BD initialization error Y
  After polygon motor Y is driven, the BD signal is not detected for 1 s.
• Remedy: PD PWB Y (LSU): 1. Confirm that the FCC wiring connector is not distorted and connect the FCC wiring all the way in. Laser scanner unit and LSU relay PWB (YC12) LSU relay PWB (YC3) and Engine PWB (YC12) 2. If the FCC wiring is disconnected, replace the FCC wiring. 3. Replace the laser scanner unit.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 4201
• Description: BD steady-state error K
  The BD signal is not detected.
• Remedy: PD PWB K (LSU): 1. Confirm that the FCC wiring connector is not distorted and connect the FCC wiring all the way in. Laser scanner unit and LSU relay PWB (YC5) LSU relay PWB (YC3) and Engine PWB (YC12) 2. If the FCC wiring is disconnected, shorted or grounded, replace the FCC wiring. 3. Replace the laser scanner unit. Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB

• Code: 4202
• Description: BD steady-state error C
  The BD signal is not detected.
• Remedy: PD PWB C (LSU): 1. Confirm that the FCC wiring connector is not distorted and connect the FCC wiring all the way in. Laser scanner unit and LSU relay PWB (YC10) LSU relay PWB (YC3) and Engine PWB (YC12) 2. If the FCC wiring is disconnected, replace the FCC wiring. 3. Replace the laser scanner unit.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 4203
• Description: BD steady-state error M
  The BD signal is not detected.
• Remedy: PD PWB M (LSU): 1. Confirm that the FCC wiring connector is not distorted and connect the FCC wiring all the way in. Laser scanner unit and LSU relay PWB (YC8) LSU relay PWB (YC3) and Engine PWB (YC12) 2. If the FCC wiring is disconnected, replace the FCC wiring. 3. Replace the laser scanner unit.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 4204
• Description: BD steady-state error Y
  The BD signal is not detected.
• Remedy: PD PWB Y (LSU): 1. Confirm that the FCC wiring connector is not distorted and connect the FCC wiring all the way in. Laser scanner unit and LSU relay PWB (YC12) LSU relay PWB (YC3) and Engine PWB (YC12) 2. If the FCC wiring is disconnected, replace the FCC wiring. 3. Replace the laser scanner unit.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB

• Code: 4300
• Description: Polygon motor phase error
  ASIC won’t settle in completion of phase adjustment for 2 s after a BD signal is detected.
• Remedy: Laser scanner unit: Replace the laser scanner unit.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB

• Code: 4600
• Description: LSU cleaning motor error
  After LSU cleaning motor is driven, the ready signal does not turn to L within 2 s. After LSU cleaning motor is stabilized, the ready signal is at the H level for 1 s continuously.
• Remedy: LSU cleaning motoror: 1. Execute LSU cleaning using Adjustment/Maintenance of the system menu. 2. Rotate the drive gear and the cleaning spiral by the hand and check that they are not unusually loaded, and replace if it is damaged. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. LSU cleaning motor and Engine PWB (YC21) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the LSU cleaning motor.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.