LG pc58ats free download

File name pc58ats.pdf

Troubleshooting Guide NO RASTER Check +B voltage at J405 Normal 0V Is the voltage at pin8,37 Check Open of IC501 8V? No Fuse of AC line Check/Replace Check the voltage 5V, Yes OK Fuse, D801, IC801 12V lines Does the square 0V waveform from pin40 of Check the voltage of No IC501 appear? C808, C809 OK Check/Replace Check I2C BUS lines Check/Replace IC501 Yes (SDA, SCL) 254~380V D801 Is the waveform of Check the voltage Lower than 6V No collector of Q451 normal? of pin9 of IC801 Check/Replace Check/Replace Yes D802, D805, D807, Q451, T451, R452 Q801, IC801 Check/Replace Is the waveform of IC803, D835, D829 No collector of Q452 normal? Check the 12V, 5V lines are shorted. Check/Replace Q452 Yes Check/Replace T701 NO SOUND (PICTURE OK) (No AM Sound) (No NICAM or FM Sound) Check whether Sound Incorrect NO Check the Audio signal of system of MENU OSD pin12 of IC101 normal is correct or not Check/Replace