1. Clean the corona wires with a dry cloth. Never use sandpaper or solvent.
  2. Clean the charge corona casing with water first to remove NOx based compounds. Then clean it with alcohol if any toner still remains on the casing.
  3. Clean the end block with a blower brush first to remove toner and paper dust. Then clean with alcohol if any toner still remains.
  4. Never touch the corona wires with bare hands. Oil stains from fingers may cause uneven image density on copies.
  5. Make sure that the wires are correctly between the cleaner pads and that there is no foreign material (iron filings, etc.) on the casing.
  6. When installing new corona wires, do not bend or scratch the wire surface. Doing so may cause uneven charge. Also be sure that the corona wires are correctly positioned in the end blocks.
  7. Clean the grid plate with a blower brush (not with a dry cloth).
  8. Never touch the charge grid plate with bare hands. Also, do not bend the charge grid plate or make any dent in it. Doing so may cause uneven charge.