• Code: 402
• Description: Transfer roller leak error 2
  A transfer roller current leak signal is detected. The current feedback signal for the transfer roller is not detected within the correct time.
• Causes: • Transfer roller set incorrectly or damaged • High voltage supply board set incorrectly or defective
• Remedy: 1. Check the high voltage supply board is set correctly. 2. Check the harness of the high voltage supply board. 3. Replace the high voltage supply board. 4. Check the transfer roller is set correctly. 5. Replace the transfer roller.

• Code: 411
• Description: Separation bias leak error
  A separation bias leak signal was detected.
• Causes: • High voltage supply board defective • Discharge plate defective
• Remedy: 1. Check the harness of the high voltage supply board. 2. Replace the high voltage supply board. 3. Replace the discharge plate.

• Code: 490
• Description: Toner supply motor leak error
  More than 1 ampere supplied to the toner supply motor for longer than 200 ms.
• Causes: • Toner supply motor defective
• Remedy: 1. Replace the toner transport motor.

• Code: 500
• Description: Main motor lock
  The machine detected motor lock (motor is not operating correctly)
• Causes: • An obstruction has blocked operation of the main motor • Main motor harness loose or broken • Main motor or main motor driver board defective • Overload on the main motor
• Remedy: 1. Replace the harness of the main motor. 2. Replace the motor. 3. Replace the main motor driver board. 4. Check for the blockages in the main motor mechanism.

• Code: 501
• Description: Paper Tray 1 error
  • When the tray lift motor rotates counterclockwise, (if the upper limit is not detected within 10 seconds), the machine asks the user to reset the tray. • When the tray lift motor rotates clockwise, (if the upper limit is not detected within 1.5 seconds), the machine asks the user to reset the tray. If one of these conditions occurs three consecutive times, the SC is generated.
• Causes: • Disconnected or defective paper lift sensor • Disconnected or defective tray lift motor • Defective bottom plate lift mechanism • Too much paper in the tray • Defective IOB
• Remedy: 1. Check if the paper is not loaded too much. 2. Check if the bottom plate smoothly moves up and down manually. 3. Check and/or replace the tray lift motor/ paper lift sensor. 4. Replace the IOB.

• Code: 502
• Description: Paper Tray 2 error
  • When the tray lift motor rotates counterclockwise, (if the upper limit is not detected within 10 seconds), the machine asks the user to reset the tray. • When the tray lift motor rotates clockwise, (if the upper limit is not detected within 1.5 seconds), the machine asks the user to reset the tray. If one of these conditions occurs three consecutive times, the SC is generated.
• Causes: • Disconnected or defective paper lift sensor • Disconnected or defective tray lift motor • Defective bottom plate lift mechanism • Too much paper in the tray • Defective IOB
• Remedy: 1. Check if the paper is not loaded too much. 2. Check if the bottom plate smoothly moves up and down manually. 3. Check and/or replace the tray lift motor/ paper lift sensor. 4. Replace the IOB.

• Code: 503
• Description: Tray 3 error (Paper Feed Unit or LCT)
  This SC is generated if the following condition occurs 3 consecutive times. For the paper feed unit: • When the tray lowers, the tray lift sensor does not go off within 15 sec. For the LCT: • When the main switch is turned on or when the LCT is set, if the end fence is not in the home position (home position sensor ON), the tray lift motor stops. • If the upper limit does not go off for 8 seconds even the tray lift motor turns on to lower the tray after the upper limit has been detected at power on.
• Causes: For the paper feed unit: • Defective tray lift motor or connector disconnection • Defective lift sensor or connector disconnection For the LCT: • Defective stack transport clutch or connector disconnection • Defective tray motor or connector disconnection • Defective end fence home position sensor or connector disconnection
• Remedy: 1. Check the cable connections. 2. Check and/or replace the defective component.

• Code: 504
• Description: Tray 4 error (3 Tray Paper Feed Unit)
  This SC is generated if the following condition occurs 3 consecutive times. • When the tray lowers, the tray lift sensor does not go off within 1.5 sec.
• Causes: 1. Check the cable connections. 2. Check and/or replace the defective component.
• Remedy: 1. Check the cable connections. 2. Check and/or replace the defective component.