Looking at the specs on that page you linked to I noticed that the remote specification says:
Multibrand Remote: No

So the likelihood of it controlling a Non-sony TV is about 0.
I have lots of Sony Remotes with TV buttons on them and they only control Sony TVs.

I gather its a bit different in the US where the TV buttons usually control the other brands of TV, but perhaps in this case this model of DVD player only "does" Sony TVs?

[or it could be that the buttons on it can be used lilke a numeric keypad of sorts, but presumably you'd need a chart to see what button is what number].

You could of course try holding the TV power button and then some other buttons to see if that "takes" and if the IR led flashes differently when you press the TV button. But you could just call Sony and ask them to confirm.