• Code: E020-0103
• Description: Error in the developing assembly (toner fault: ATR error)
  Measured density value of patch for Black is higher than the upper limit.
• Remedy: Check the toner leakage from the toner buffer block within the developing assembly. Replace the patch image reading sensor.

• Code: E020-0200
• Description: Error in the developing assembly (toner fault: ATR error)
  Measured density value of patch for Yellow is lower than the lower limit.
• Remedy: Check the toner leakage from the toner buffer block within the developing assembly. Replace the patch image reading sensor.

• Code: E020-0201
• Description: Error in the developing assembly (toner fault: ATR error)
  Measured density value of patch for Magenta is lower than the lower limit.
• Remedy: Check the toner leakage from the toner buffer block within the developing assembly. Replace the patch image reading sensor.

• Code: E020-0202
• Description: Error in the developing assembly (toner fault: ATR error)
  Measured density value of patch for Cyan is lower than the lower limit.
• Remedy: Check the toner leakage from the toner buffer block within the developing assembly. Replace the patch image reading sensor.

• Code: E020-0203
• Description: Error in the developing assembly (toner fault: ATR error)
  Measured density value of patch for Black is lower than the lower limit.
• Remedy: Check the toner leakage from the toner buffer block within the developing assembly. Replace the patch image reading sensor.

• Code: E021-0000
• Description: Developing motor error
  Indicates that the signal indicates the motor rotates with the target speed is not sent to the port after passing more than 3 sec from the startup of the motor.
• Remedy: Check on connection of the developing motor and the DC controller PCB, Replace the DC controller PCB, Replace the developing motor

• Code: E025-0000
• Description: Error in the toner motor
  Indicates an error of Y developing assembly toner supply
• Remedy: Check on connection of the toner motor and the DC controller PCB, Replace the DC controller PCB, Replace the toner motor

• Code: E025-0001
• Description: Error in the toner motor
  Indicates an error of M developing assembly toner supply
• Remedy: Check on connection of the toner motor and the DC controller PCB, Replace the DC controller PCB, Replace the toner motor