LG 051ATS free download

File name 051ATS.PDF

TROUBLESHOOTING NO RASTER CHECK +B at D807 cathode Normal Abnormal Check Open Is the voltage at pin37 FUSE of AC line & 12 of IC501 8V? No OK Check /replace Yes Check the in/out Fuse,DB801,IC801 of IC841 Check pin40 Check the voltage No of C806 of IC501(H-out) 0V No Check &replace Yes 254~380V Check /replace IC501 Check u-COM DB801,R811 Check Q741 pin15 low? Check the voltage No collector waveform of pin4 Check &replace No Yes IC501 Check /replace Check T401 Q802 Check /replace & each pin voltage D806,IC803,R809 No Check &replace Yes IC501 Is the voltage at pin37 & 12 of IC501 8V? NO TELETEXT Check the voltage of IC701 pin19 OK 0V Check Check 5V Supply CVBS signal Line of IC701 at IC701 pin9 & P701 OK OK Check IC701& IICBus Line Not OK Check / Replace Q701, X701, &