You can set the administrator password using Web Config from a computer on the additional network.
Enter the printer's IP address for the additional network into a browser to access Web Config.
Select the Product Security tab > Change Administrator Password.
Enter a password to New Password and Confirm New Password. Enter the user name, if necessary.
If you want to change the password to new one, enter a current password.
Select OK.
To set or change the locked menu items, click Administrator Login, and then enter the administrator password.
To delete the administrator password, click Product Security tab > Delete Administrator Password, and then enter the administrator password.