Samsung TXM3297HF Owner's Instructions Manual page 64

SPECIAL FEATURES
The V-Chip feature automatically 'focks out programming that is deemed inappropriate
for children. The user must first enter a PTN (personal ID number) before aply of the
V-Chip restrictions can be set up or changed.
Note : W'hen the V-chip feature is active, chaetrtel-auto program features do not function.