ADJUSTMENT FAILED

Cause 1: A paper jam occurred in the machine during the automatic gradation adjustment.

     Action: Clear the jammed paper, and then load paper again.
    "Clearing Jams"
    "Multi-Purpose Tray"
    "Paper Cassette"

Cause 2: The toner ran out completely during the automatic gradation adjustment.

    Action: Replace the toner cartridge with a new one.
  "Replacing Toner Cartridges"

Cause 3: The transfer belt has dirt.
     Action: Clean the transfer belt.
   "Cleaning the ITB"