Here is some good information from an AVSFORUM Thread. At this early stage of VOOM is good to get information from wherever it comes.
Posted by K4LK
I discovered the hidden "System Configuration" menu that contains manual tuning, AV testing, etc. From the System Settings menu, select #8 "Installation Settings", then enter 988. To get to the System Settings menu, hit the big VOOM button, then the green button, then select it from the "Options & Settings" menu.