• Code: 504-01
• Description: Tray 4 error (Paper Feed Unit or LCT) For the two-tray paper feed unit When the tray lift motor is turned on, the upper limit is not detected within 10 seconds. If this condition occurs three consecutive times, the SC is generated. For the LCT If the upper or lower limit is not detected within 8 seconds when the tray lift motor is turned on to lift up or lower the tray
• Causes: • Defective tray lift motor or connector disconnection • Defective lift sensor or connector disconnection
• Remedy: 1. Check the cable connections. 2. Check and/or replace the defective component.

• Code: 504-02
• Description: Tray 4 error (3 Tray Paper Feed Unit)
  This SC is generated if the following condition occurs 3 consecutive times. For the two-tray paper feed unit • When the tray lowers, the tray lift sensor does not go off within 1.5 sec. For the LCT • If the upper limit does not go off for 1.5 seconds even the tray lift motor turns on to lower the tray after the upper limit has been detected at power on.
• Causes: • Defective tray lift motor or connector disconnection • Defective lift sensor or connector disconnection
• Remedy: 1. Check the cable connections. 2. Check and/or replace the defective component.

• Code: 505-1
• Description: 5th tray lift malfunction (optional LCT)
  This SC is generated if the following condition occurs: • When the tray lift sensor of the LCT 1200-sheet does not go on after the tray lift motor has turned on to lift the paper tray. • When the tray lift sensor of the LCT 1200-sheet does not go off after the tray lift motor has turned on to lower the paper tray. • When the tray lift sensor of the LCT 1200-sheet does not go on after the pickup roller solenoid has turned on at power on.
• Causes: • Tray lift motor defective or disconnected • Tray lift sensor defective or disconnected
• Remedy: 1. Check the harness connections. 2. Replace the tray lift motor. 3. Replace the tray lift sensor.

• Code: 505-2
• Description: 5th tray lift malfunction (optional LCT)
  Both tray lift sensor and lower limit sensor are turned on at the same time when the main power is turned on or the right door is closed.
• Causes: • Tray lift motor defective or disconnected • Tray lift sensor defective or disconnected • Lowe limit sensor defective or disconnected
• Remedy: 1. Check the harness connections. 2. Replace the tray lift motor. 3. Replace the tray lift sensor. 4. Replace the lower limit sensor.

• Code: 530
• Description: Fusing fan error
  The IOB does not receive the lock signal 10 seconds after turning on the fusing fan.
• Causes: • Defective fusing fan motor or connector disconnection • Defective IOB
• Remedy: Check the connector and/or replace the fusing fan motor.

• Code: 531
• Description: Ventilation fan (at the left side of the machine) motor-front/rear error
  The IOB does not receive the lock signal for 2 seconds after turning on the ventilation fan motor-front/rear.
• Causes: • Defective ventilation fan motor-front or rear
• Remedy: Replace the ventilation fan (at the left side of the machine) motor-front or rear.

• Code: 532
• Description: IH coil fan error
  The machine does not detect the fan motor lock signal for 2 seconds while the IH coil fan turns on.
• Causes: • Disconnected harness • Overload on the IH coil fan motor • Defective IH coil fan motor • Defective IOB
• Remedy: 1. Check or replace the harness. 2. Replace the IH coil fan. 3. Replace the IOB.

• Code: 533
• Description: IH inverter fan error
  The machine does not detect the fan motor lock signal for 2 seconds while the IH inverter fan turns on.
• Causes: • Disconnected harness • Overload on the IH inverter fan motor • Defective IH inverter fan motor • Defective IOB
• Remedy: 1. Check or replace the harness. 2. Replace the IH inverter fan. 3. Replace the IOB.