Sanyo LCD-22XR8DA Service Manual

4Fig-1 adjustment flow-chart4. Adjustment instruction4.1 Unit adjustments4.1.1Connect all the boards according to wiring diagram, then power on and observe the display.4.1.2 Method for entering factory menu:a) Press “SOURCE”, “2”, “5”, ”8” and “0” in turn to enter factory menu;b) Press “” and “” to move the cursor to the adjustment page of the level one factory menu,then press ”OK” to enter;c) Press “” and “” to move the cursor up and down;d) Press “” and “” to adjust the item when the cursor move to a certain adjust item;e) Press “MENU” to exit to the previous factory menu;f) Press “EXIT” to exit the factory menu at any situation;g) Press “OK” to enter the sub factory menu;h) ADC ADJUST, ADC correction of VGA, Component channel;i) W/B ADJUST, white balance adjustment;j) POWER MODE, set the turn-on modes. Standby---standby when power on; Mem---memory;ForceOn---power on; ForceOn can be used for aging; set the “power mode” to “Standby” whenpreset ex-factory unless the client appointed it;k) ISP MODE, ON---soft upgrading through VGA port with ISP instrument, OFF---DDC function ofVGA; the setting will not be memory and will be “OFF” when power on again;l) RESTALL, initialization of the factory and user data; after this item is confirm, the unit will restartand display the guiding image.m) FACTORYDATAREST, factory data initialization (including white balance adjustment, ADCcorrection and other adjusted data);n) FACEORY Channel PRESET, preset the factory channel; please connect to the center signalsource when operating; the present digital frequency is CH28(529.5MHz), CH33(564.5MHz) forAustralia, if the signal changes, perform “DTV manual search” in “Channel” menu and theoperation needs 15s or so.o) CUSTOM Channel PRESET, preset the custom ATV channel, they are CH2(66.5MHz),CH7(184.5MHz), CH9(198.5MHz), CH10(212.5MHz), CH28(529.5MHz);p) MST DEBUG, the default is OFF. OFF---RS-232 should match the design criterion; ON--- itshould be convenient for using exploitation tool to adjust. The setting will not be memory and willbe “OFF” when power on again;q) BACKLIGHT: adjust the backlight brightness, adjust the data and test the voltage of X804 pin2(PWM), let the voltage to be the corresponding PWM voltage which the brightness is maximum.It will be preset and doesn’t need adjust.r) SSC ADJUST, adjust the frequency spectrum expand, it will be preset and doesn’t need adjust.s) AUDIO CURVE, adjust the sound curve, it will be preset and doesn’t need adjust.t) RF AGC delay Adj, adjust ATV RF AGC-take;u) There is data in EEPROM after software upgrade, please perform REST ALL before the firstadjustment.Preset ex-factory