Connect the printer to the standard network by Ethernet cable, and then check the connection.
If you want to configure settings on a printer with Lock Setting enabled, you must log in as an administrator.
If 
is displayed on the printer screen, tap this icon and log in as an administrator.
Connect the printer and hub (LAN switch) by Ethernet cable.
Select Settings on the home screen.
Select General Settings > Network Settings > (Standard >) Connection Check.
The connection diagnosis result is displayed. Confirm the connection is correct.