Olevia LT37HVS - Manual (Page 45)

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Adjusting On Screen Displays (OSD) OSD-Miscellaneous
Activating the Parental Control Feature
Once you enter the highlighted section of Parental Control, you will
have to enter your password. The Factory Default password is"9999".
Once you enter the Parental Control Menu, you may change the
password to your personal preference.
To setup, enter each sub-menu to setup your parental controlled TV
channels.