If you used to use Wi-Fi (wireless LAN) but no longer need to do so due to a change in connection mode and so on, you can disable your Wi-Fi connection.
By removing unnecessary Wi-Fi signals, you can also reduce the load on your standby power.
Select Wi-Fi Setup on the printer's home screen.
To select an item, use the 
buttons, and then press the OK button.
Select Wi-Fi (Recommended).
Press the OK button.
Select Others > Disable Wi-Fi.
Follow the on-screen instructions.