Question about Pioneer DV250
 

I misplaced the manual for my player and have a question.

I was messing around earlier and went to the initial settings screen, then went to options. It brought up a choice for parental lock. So I goto that, and there is an option at the bottom that says country code. I clicked on it and gave my password and it has the country as U.S. and the numerical code as 2119. You can switch the country and the number changes. For example Great Britain is 0702. What does this mean?