LG 073B-TRO free download

File name 073B-TRO.pdf

Trouble Shooting Check pin 42 of IC01. 3V Check / Replace Check the voltage at Q12,Q851,Q852,Q853,D813 pin 50 of IC01. 3.3V 0V Check the H-OUT voltage at pin 50 of ICP(V)01. Check / Replace Check / Replace IC1,IC301,FR359,FR360, Q804,Q805,R813,ZD801 D339,D349 Check the voltage of C828(+). Check / Replace ICP(V)01 33V Check / Replace Check the voltage at FR848,D811,R407. pin 2 of FBT. 135V (OPTION) Check / Replace Check / Replace D813,L801,IC804,R811,R812. Q401, Q402, T401. Check the voltage of C834(+). Check the voltage at Check / Replace pin 9 of STR. SW1101,F1101,T801,D801,R802. 18V Check / Replace Check / Replace D802,R801,R857. IC801 and the secondary part of POWER circuit. - 19 - Check if heater element is lighting. Check the heater voltage. Check/Replace Increase the screen FR442,R910. voltage of FBT. Check/Replace CPT. Retrace line is Screen is black. visible. Check the waveform Check FBT & CPT socket at pin 12 of P501A. & CPT. Check the waveform Check the waveform at pin 26,28,30 of IC702. at pin 24 of TU101. Check/Replace Check/Replace Check/Replace Check/Replace