Sanyo LCD-42XR7H Service Manual

Contents

4Fig-1 adjustment flow-chart3. Instruction on adjusting3.1 Method of entering the factory menuThe method of entering the factory menu is SOURCE, 2, 5, 8, 0.Press 1 to enter page1, the function is Cotez Feature Setting, to set LOGO, frequency ect,.Press 2 to enter page2, the function is Color Temperature Setting. The color temperature now is12000.Press 3 to enter page3, the function is Auto Color setting, to set AUTO COLOR of each channel.3.2 Writing programWrite EEPROM N401, NA02, NS01, NB06, NB15.3.3 Main board adjustmenta) Connect X401 of main board and IR board, insert 11-pin wire of power board to XB7, then theindicator light of IR board should be red.b) Press POWER on the remote control, now the indicator light of IR board turns blue, test XB7PIN1 to be 9V, PIN3 5V, PIN5/PIN6 12V, PIN9 3.3V, LB04 3.3V, NS03 PIN2 1.8V, N404 PIN22.5V.c) Connect PC and serial terminal, flash write HDCP KEY.3.4 TV board adjustment3.4.1 IF amplify adjustmenta) Base on 3.3 a), connect 6-pin wire of power board and X04 of TV board, press POWER on theremote control, now the indicator light of IR board turns blue, TEST PIN2 of X04 to be 5V, PIN49V, L07 3.3V.b) Input +5V to TP1 and 0V to TP2, input 38.9m IF signal to J1(use IF signal generator), adjust L10to let X08 be 1.6V.c) Input 0V to TP1 and +5V to TP2, input 33.5m IF signal to J1(use IF signal generator), adjustRP01 to let X08 be 1.6V.d) Joint the tuner J1.3.4.2 Unit connect adjustmentConnect the main board, TV board, IR board, SCART connect board and key board according tothe wiring diagram. Press POWER button on the remote control, the indicator light on IR board turnsblue, test X12 PIN1 of TV board to be +24V.3.4.3 AGC adjustmenta) Receive 60dB signal of D-8 and test X07 with DC voltmeter.b) Adjust RP201 to let the data of voltmeter just below 4.0V.c) Input 100dB signal of antenna, the picture should not no-synchronous or distortion; the colorshould not disappear when input 30dB-40dB low signal and the picture should synchronous andthe sound normal.3.5 VGA adjustmentPreset ex-factoryCheck the accessories and pack them in box