Enter the printer's IP address into a browser to access Web Config.
Enter the printer's IP address 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 > 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.
Select Settings > General Settings > Network Settings on the printer’s control panel, and then check that the password is required.