h) Factory menu item “ADC Calibrate” is used to correct ADC of VGA and Componentchannel;i) Factory menu item “W/B ADJUST” is used to adjust white balance;j) Factory menu item “POWER MODE” is used to set power-on mode, “Standby” means theset will be in standby state after power-on; “MEM” means the set will be in the state beforethe last power-off; “ForceOn” means the set will be working automatically after power-on,this mode is also used for factory-machine-aging; default setting should be “Standby” modeunless specified by customer requirement;k) Factory menu item “ISP MODE” is used to upgrade unit software from VGA port when theitem is set as “ON” and the set is connected to ISP adjustment equipment; DDC function ofVGA port will be recovered when the item is set as “OFF”; the value of the item can not bekept in the memory, that is to say the item is reset as “OFF” after power-on again;l) Factory menu item “RESET ALL” is used to reset factory menu data and user menu data;after execute the item, the set will be started up again and the startup guided picture will bedisplayed;m) Factory menu item “FACTORY CHANNEL PRESET” is used to preset factory programsdata; it is necessary to connect to central signal source for DTV searching programs. Nowdigital frequency of central signal CH28(529.5 MHz) and CH33(564.5 MHz) are distributedto Australia programs. Primary preset programs would not be modified along with thechanging of central signals, so please select item DTV in menu Channel to manual searchdigital programs, the process will spend about 15s;n) Factory menu item “CUSTOM CHANNEL PRESET” : first delete all DTV/ATV programs forfactory adjustment, then preset ATV channel data according to customer order requirements;please execute the item to clear out all programs for factory adjustment before leavingfactory;o) Factory menu item “MST Debug” :default setting “OFF” is used for engineering modelswhose RS232 functions can measure up to design specifications; setting “ON” is convenientfor debugging by developing tools; the value of the item can not be kept in the memory, thatis to say the item is reset as “OFF” after power-on again;p) Factory menu item “BACKLIGHT” is used to adjust backlight brightness, adjust the item andtest voltage of X801-12# (PWM) to measure up to the maximum PWM voltage in panelspecification;q) Factory menu item “SSC ADJUST” is used to adjust expended functions of frequencycontent, the software having been preset according to model need not be adjusted again;r) Factory menu item “AUDIO Curve” is used to adjust audio curve; without special customerrequirements, the software having been preset according to model need not be adjustedagain;If the software has been upgraded or EEPROM has data already, please execute item“RESET ALL” before adjustment for the first time.2.1.3 ADC calibrationADC calibration of VGA channela) Switch to VGA channel;b) Press key “SOURCE”, then press number keys “2、5、8、0” to enter into initial factory menu;c) Move cursor to item “ADC ADJUST” and press key “OK” to enter into interior factory menu;d) Input VGA signal (VG-848 Timing:856(1024×768/60 Hz),Pattern 920 Gray 8 step(H)),