Is anyone familiar with the acronyms used in TV service menus? youd think itd be pretty straight forward. What does FAC stand for? I know R, G, B, V and H. There are like 100 different controls and most of then dont even seem to change anything when I adjust the picture.

The problem Im having now is that the sides looks convex and the picture is too wide from right to left. There's an attribute called Hsize6 and adjusting it does nothing.

On my Sony I was able to correct the convex shape but this one is baffling me. Its a Magnavox. Im trying to adjust as much as I can without having to physically open it up and adjust things that way