Samsung PN51F4500AFXZA E-Manual page 21

Similarly, if you click TVoG under AIILIIL, then all the categories in the young
adult group will be blocked (TVoG0TVolPG0TVo14 and TVoMA). The sub-
ratings (D0IL0S0 V) work similarly. So, if you block the L sub-rating in
IPG, then the L sub-ratings in TVo14 and TVoMA will automatically be
blocked.
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To unblock a category, click the lock. To unblock all the categories in
a row, click the lock under AII..............III ...............
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To watch a blocked program, you must enter the Security code when
requested.
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