If you already have it, look in the user manul.
If you still need to buy it, ask the shop. They surely know.
Or contact Thai customer service. I can't read Thai, but I'm sure there is contact information to be found on http://www.samsung.com/th/#latest-home
UA40C5000QR from Thailand. Will it support both NTSC and PAL?
I am planning to buy an XBOX which is only NTSC. Will it work on my UA40C5000QR ?