Enter the printer's IP address into a browser to access Web Config.
Enter the IP address of the network (standard/additional) you want to configure from a computer that is connected to the same network as the printer.
You can check the IP address of the printer from the following menu.
Settings > General Settings > Network Settings > (Standard or Additional) > Network Status > Wired LAN/Wi-Fi Status
Enter the password, and then click OK.
Select in the following order.
Device Management tab > Control Panel
On the Panel Lock, select ON.
Click OK.
Check that 
is displayed on the home screen on the printer's control panel.