• Code: E020-xxFF
• Description: There is an ATR error. xx=01 for Y; xx=02 for M; xx=03 for C; xx=04 for without color distinction
  There is no toner inside the Bk developing assembly. - the toner is not supplied to the developing assembly correctly. - the hopper stirring motor is not rotating normally. The hopper connector has poor contact. The black toner supply motor (M25) is faulty. The hopper stirring motor (M23) is faulty. The black toner level sensor is faulty. The DC controller is faulty.
• Remedy: Turn off and then on the main power; then, execute the intermediate transfer belt.

• Code: E021-0001
• Description: There is an error in the rotation of the developing assembly.
  The developing rotary home position is not detected. The motor rotates out of sync because of poor torque caused by any of the following: The developing rotary HP sensor is faulty; the wiring of the DC controller is faulty; there is an excess load on the developing assembly.
• Remedy: Turn off and then on the main power.

• Code: E021-0002
• Description: There is an error in the rotation of the developing assembly.
  The length of the flag detected during rotation is longer or shorter than the designed flag. The motor rotates out of sync because of poor torque caused by any of the following: the developing rotary HP sensor is faulty; the wiring of the DC controller PCB is faulty; there is an excessive load on the developing assembly.
• Remedy: Turn off and then on the main power.

• Code: E023-0001
• Description: The developing motor (M3) does not rotate normally.
  After motor start-up, a lock state is not detected for 1 sec or more.
• Remedy: Turn off and then on the main power.

• Code: E025-0001
• Description: There is an over-current in the hopper stirring motor (M23)or the black toner supply motor (M25).
  There is an overcurrent in the hopper stirring motor (M23).
• Remedy: Turn off and then on the main power.

• Code: E025-0002
• Description: There is an over-current in the hopper stirring motor (M23)or the black toner supply motor (M25).
  There is an over-current in the black toner supply motor (M25).
• Remedy: Turn off and then on the main power.

• Code: E025-0410
• Description: There is an over-current in the hopper stirring motor (M23)or the black toner supply motor (M25).
  The connector of the black toner supply motor (M25) is identified as being disconnected.
• Remedy: Turn off and then on the main power.

• Code: E032-0001
• Description: The NE connector counter does not operate.
  There is an open circuit in the line for the count pulse signal.
• Remedy: Turn off the main power, and check the cable for an open circuit; then, turn on the main power.