My bravia model is KDL- 40W650D. I am not able to find ntsc/pal settings on my TV. Under settings there are only 3 options: preferences, customer suppport, accessibility.

SOURCE: how to change from ntsc to pal on bravia kdl-40s3000 40 "

Changing this requires a change of the tuner. There is nothing inside the set that can make this change. There are external systems that can do this, but they are expensive (multiple $100s).

Bottom line is that this would require a change in the internals of the set.
Hope this helps.

Dan

SOURCE: Will A Sony Bravia KDL 32s2010 TV purchased in the

This TV will work in Australia as its multi system and auto-power TV.

SOURCE: convert ntsc to pal for sony bravia tv

While a modern PAL TV can display NTSC sources (namely DVD players and PAL VHS players that support pseudo-NTSC), an NTSC TV can not display a PAL source, unless it's an expensive multi-standard TV. Sorry pal, bad choice.

SOURCE: How do I get a US Sony Bravia KDL-42V4100 to work in the UK?

I have encountered this before---there are set top boxes that will convert the NTSC to PAL and the only other concern is the line voltage being the same or not.

SOURCE: PAL to NTSC

If the set is not Not Ntsc to Pal you are going to need a box that converts from the one format to the other[that simple).