1. Remove the toner bottle cradle
  2. Turn the cradle upside down.
  3. You can see the set sensor [A] behind the plastic sheet.
  4. Pull out the plastic sheet [B] to uncover the sensor.
  5. At the front, disconnect the sensor [A] (x1).
  6. At the rear, remove the spring [B] (x1).
  7. At the rear, remove the sensor (x3).