Samsung UN60ES7500FXZA - Manual (Page 174)

entry field to lock (That is, you “click
it”.). For example, click the lock at
the intersection of V and TV-MA ,
and you block all programs that are
rated violent and for mature adults.
N To unblock a category, click the lock
icon. To unblock all the categories in
a row, click the lock under ALL .
N To watch a blocked program, you
must enter the PIN code when
requested.