LG pc73a cf25a64 cf28a64 free download

File name pc73a_cf25a64_cf28a64.pdf

Troubleshooting Guide NO RASTER Check +B voltage at D825 Cathode. Normal Abnormal Is the voltage at pin8 and Check Open 37 of IC501 8V? No Fuse of AC line. Check/replace Check the in/output Yes OK Fuse, D801 and of IC607. IC801. Check pin40 of Check the voltage of 0V No IC501 (H-Out). C808. OK Check the IIC Bus Check/replace Check/replace Yes Line (SDA,SCL) pin3 254~380V IC501. R801 and D801. and 4 of IC501. Check Q451 Check the voltage Lower than 6V No Collector waveform. at pin9 of IC801. Check D802, Check/replace Q451, Yes D805, D807, Q801 T451 and R452. and IC801. Check Q452 Check/replace Collector waveform. IC803, D824 and D835. No Check/replace Q452. Yes Check T401 & each pin voltage. NO SOUND (PICTURE OK) AM NO SOUND NICAM,FM NO SOUND No Check Sound No Select correct Check L System Select correct system in MENU system in MENU is right? system in MEN