what JBean said.
If you are interested, for basic calibration, you need some sort of test patterns to adjust/calibrate your tv. If you own some DVD Videos that are THX certified, like the DVD Video of "The Incredibles", they have some Audio and Video test patterns in one of those menus...it might be a good start for you to go from there so you won\'t have to spend any money on other tools...
so, once you go into the video test patterns, follow the instruction to adjust the basic: picture (contrast), brightness, color, tint, and possibly sharpness. Use your TV remote control to adjust your tv is more preferable. To me, even to this day, I have trouble adjusting color, tint, and picture (contrast):aka white level. The easiest adjustment to me is black level or brightness...
My HDTV out of the box have black level so dark that many of the shadow details are lost as black. So, I use a specific test pattern (from avia calibration disc) to adjust black level. On this test, I cranked up the brightness (black level) until I can see two vertical very dark gray scrolling bars on the black screen. The left bar is darker than the right bar. I have to cranked up the brightness (aka: black level) several ticks for me to be able to see those scrolling dark gray bars..I adjust until the left scrolling bar is nearly invisible into the black screen while the right scrolling bar is somewhat visible...
By doing that, i am optimally adjust black level to its proper place where black is not too dark or too gray so i can see the shadow details of many movies and stuff. The other basic adjustments (picture: white level, color, tint, sharpness) are trickier and harder for me to adjust...
Of course, for more advanced adjustment, you need to go into the service menu to calibrate...
Like JBean said, you need the code to get into the service menu. The reason why code is require is because once you are in the service menu, and you don\'t know what you are doing in there, you could ruin your tv and the manufacture will void you warranty. As for the brand of my tv, i just pushed some combination buttons on the remote control and I enter the service menu on the tv. In there, I manage to calibrate color temperature, color decoder, turn off sharpness enhancements, unclip, and unfilter both luma and chroma resolutions, and turn off black level limiter, adjust video overscan, etc...
There are other stuffs that I still haven\'t adjust since I don\'t know how or understand what those abbreviation means in the service menu. Stuffs that I still have trouble adjusting is focus, geometry, and convergence...
I think it\'s better if you play around with the basic calibration on the user menu using a video test pattern than going into the service menu, unless you are an enthusiast or a pro and know what you are doing in there...if you go into the service menu by accident, you can turn the service menu off, on my tv, i turned the service menu off by turning off the tv...
I know that Videoholic can explains better than me since he\'s the one that shows me a website about it years ago...