Open the front cover.
Release the waste toner box.
Press the waste toner box release button.
The waste toner box will fall forward as shown.
Gently support the box with your hands as you let it fall forward as far as it will go.
Grasp the green knob to release the lock and gently remove the charger cleaner.
Clean the main charger.
Gently push the charger cleaner all the way in, and gently pull it out.
Insert it so that label (A) on the cleaning target side and label (B) on the charger cleaner side are oriented as shown.
Repeat step 4 with all other main chargers.
There are a total of 4 places to be cleaned in the machine as shown.
Replace the charger cleaner in its original position.
Push the waste toner box into the machine.
Push the box in until it clicks into place.
Close the front cover.