1. Connect the I/F cable to the main machine.
  2. Connect the peripheral to the left side of the machine.
  3. Plug the main machine into its power source, and then switch the machine on.
  4. Enter the SP mode, and then do SP5-804-128 (Output Check De-curler Unit Move: Upper Default).
  5. Send a sheet of paper through the Decurl Unit (the upper path is the default).
  6. Turn the machine off, and then unplug it from its power source.
    If the output check is not successful, do the procedure in the next section below to change the unit path.