Basic Receiving and Playing OperationsLED -LCD television Owner’s Manual 21Source LockThis function is used to prohibit watching a programfrom various external inputs, e.g. AV and PC, etc. Press/ to select a certain option, and then press OKto enter the submenu, press / to set an externalinput lock ON or OFF. If an external input lock is setON, after entering this mode, the screen will displayblue background with muting and a prompt SourceLock; during Source Lock prompt, Source Lock willremain if there is no other display on the screen. Towatch a program from a locked external input, justenter Source Lock submenu to set correspondingstatus as OFF or execute the Unlock option in the LockSet menu.Child Lock SettingPress / to select the Child Lock option, and thenpress / to set ON or OFF. If set ON, this controlkey will not respond, and the screen will display ChildLock when the key is pressed; if no other operation ismade, the display will automatically disappear later.To resume Child Lock function, just enter the Lock Setmenu to set Child Lock OFF or execute the Unlockoption.Max Volume SettingPress / to select the Max Volume option, andthen press / to freely adjust the max volumewithin the range of 0~100. After finishing the setting,the max volume in the Volume menu will not exceedthe preset max volume; for example, if the presetmax volume is 30, the volume in the Volume menucan not be increased any longer upon reaching 30;if the preset max volume is less than the value in theVolume menu, the latter will decrease along with thedecrease of preset max volume.Power on VolumePress / to select the Power on Volume option,and then press / to freely adjust the volumewithin the range of 0~100.Unlock SettingPress / to select the Unlock option, and thenpress OK to clear all the lock settings, namely set allthe lock setting options as OFF; the Preset Channelis set as OFF and max volume returns to 100 (exceptpassword).Advanced functionTo watch a 3D TVIf the TV is currently in the 2Dmode:Stand-by switch3D switch keyPress the 3D switch key on the remote controlA to call out the prompt menu. (See Fig. 1 below)