LG 058ats free download

File name 058ats.pdf

TROUBLESHOOTING NO RASTER Check +B voltage at E17 Normal 150Vdc 0V Is the voltage at pin12, Check the voltage of 150Vdc 37 of IC501 8V? C821 No Check the voltage 8V Check/Replace R410 Line. Yes Check/Replace D816, D821, IC841, D824 Open Check Fuse of AC line Does the square waveform from pin40 of Check/Replace Fuse, IC501 appear? OK OK No D801~804, TH801 Check I2C BUS lines Check/Replace IC501 Yes Check the voltage of 0V (SDA, SCL) C806 Is the waveform of No collector of Q401 normal? Check/Replace 254-380V D801~804, R801 Check/Replace FR802, Yes D817, Q401, Q403, T451 Lower than 18V Check the voltage of pin4 of IC803 Is the waveform of No collector of Q402 normal? Check/Replace D805~806, IC803, IC801 Check/Replace Q402, D403~4, C405, Yes Check/Replace IC841, C409~411 IC843, D816, D815 Check the 8V, 5V lines are shorted. Check/Replace T406 Check/Replace 0V Check the voltage of