You can setup a system password for the device to be protected from unauthorized access. Once system password is setup the device cannot enter the Preview Test mode without the password. Below are the steps on how to setup a system password:
1. Press the UP and DOWN button to find the "Password Set" option.
2. Press LEFT and RIGHT button to choose either "On" or "Off".
3. Press OK once function is turned on ad set the password. Press the LEFT and RIGHT button to go alternately between each data slot for the password. Use the UP and DOWN button to change the number.
4. Press OK to confirm the changes, and press MENU to exit.