There are plenty of test patterns that you can use for calibration. What type of TV do you have? What inputs are there? Do you have any way to hook it up to a computer or a PS3?
If you can hook up a device which connects to the net (or have a web browser built into the TV, you future person you), visit any of these pages to help calibrate your settings:
http://www.lagom.nl/lcd-test/
http://www.displaycalibration.com/
http://epaperpress.com/monitorcal/index.html
If you can hook up a computer, you could always run the Nokia Monitor Test program:
http://www.softpedia.com/get/Multimedia/Video/Other-VIDEO-Tools/Nokia-Monitor-Test.shtml