Bob,
BE VERY VERY CAREFUL!!! Messin with the service menu of a TV set will more that likely screw up your TV and void it's warranty!!. Have a certified ISF (Imaging Science and Foundation) dealer go to your house and have him calibrate your tv for you.. he'll do convergence for you, plus among a whole host of tweaks!! What you are looking at now is only 30% of what that tv's capable of doing.. calibrating it yourself will give you at most 70%, but the ISF fella will make you look like you are looking through a window instead of a plastic screen!! Email me for details!!

John