Basic Receiving and Playing OperationsLCD television Owner’s Manual 21will not be changed after executing the Unlockoption.Tuning Lock❖Press CH+ /CH- to select the Tuning Lock option, andthen press VOL-/VOL+ to set ON or OFF.(If set ON, the Tuning Menu is not available in TVmode. To make any operation related to the TuningMenu, it is necessary to enter the Lock Set menu to setTuning Lock OFF or execute the Unlock option.)Preset Source❖Preset Source may be set as Off, TV, AV, Component,HDMI, PC and USB. When the Preset Source is set asTV, after entering the Preset Channel menu, pressVOL-/VOL+ to select the preset channel, and thechannel will be forcibly switched to the preset oneupon turning the TV on; when the Preset Source is setas other signal sources, the TV will be forcibly switchedto the preset source upon turning on. For example,when the Preset Source is set as YPbPr/YCbCr, the TVwill be switched to YPbPr/YCbCr upon turning on;when set as OFF, the preset function will be closed.Preset Channel❖Only when the Preset Source is set as TV can thePreset Channel option be available. Press VOL-/VOL+to select preset channels from 1-125, OFF.Source Lock❖This function is used to prohibit watching a programfrom various external inputs, e.g. AV and PC, etc. PressCH+ /CH- to select a certain option, and then pressVOL-/VOL+ to set an external input lock ON or OFF.If an external input lock is set ON, after entering thismode, the screen will display blue background withmuting and a prompt Source Lock; during SourceLock prompt, Source Lock will remain if there is noother display on the screen. To watch a programfrom a locked external input, just enter Source Locksubmenu to set corresponding status as OFF orexecute the Unlock option in the Lock Set menu.Child Lock❖Press CH+ /CH- to select the Child Lock option, andthen press VOL-/VOL+ to set ON or OFF. If set ON,this control key will not respond, and the screen willdisplay Child Lock when the key is pressed; if no otheroperation is made, the display will automaticallydisappear later. To resume Child Lock function, justenter the Lock Set menu to set Child Lock OFF orexecute the Unlock option.Max Volume❖Press CH+ /CH- to select the Max Volume option,and then press VOL-/VOL+ to freely adjust the maxvolume within the range of 0~100. After finishing thesetting, the max volume in the Volume menu will notexceed the preset max volume; for example, if thepreset max volume is 30, the volume in the Volumemenu can not be increased any longer upon reaching30; if the preset max volume is less than the value inthe Volume menu, the latter will decrease along withthe decrease of preset max volume.On Volume❖Press CH+ /CH- to select the Power on Volumeoption, and then press VOL-/VOL+ to freely adjustthe volume within the range of 0~100.Unlock❖Press CH+ /CH- to select the Unlock option, and thenpress VOL+ to clear all the lock settings, namely setall the lock setting options as OFF; the Preset Channelis set as OFF and max volume returns to 100 (exceptpassword).I❖ 2C BusIt is no need for user to select the after-sale serviceoption.USB ModeNoteThe diagrams in the following section areRschematic and only for your reference. Please seethe actual product if necessary.TO USE THE USB DEVICESupported file formats:APhoto: *.jpg;•Music: *.mp3;•TEXT Reader: *.txt•NoteDue to the particularity of file coding, some filesRmay be unable to read.Supported equipment:B Support the USB flash disks that supports MassStorage Protocol and whose file system is FAT32,If USB equipment could not be identified dueto unsupported file system, please format the