LG fx4troub free download

File name fx4troub.pdf

TROUBLE SHOOTING GUIDE (CDP) Turn power on. NO Is power on? Check power supply circuit. YES NO Does initial read work? Check laser circuit. YES Check focus circuit. Check disc. NO Does it play? Check tracking servo circuit. YES NO Does it output audio? Check audio circuit YES OK -2- Fails to initial read Disc motor turns. Does laser light? A YES YES B Does RF NO Does tracking NO Does signal NO Does TE1 signal NO waveform servo work? appear at IC801 appear at pin 54 Lower envelope Defective IC appear? 50 pin (TEO) of IC 801? of IC801 74 801, pick up (IC801 74 pin) pin(RF) and/or short waveform is flat. wire. 1.3V YES YES Defective pattern. YES Does signal appear at IC 803 NO Defective IC 801 Pin 26 and Pin 27 ? and/or IC 803 YES Defective pick-up and/or connector. Is rotation normal? NO Does GFS (IC 802 pin 25 NO Defective IC 801. show as below? YES NO Scratch in disc Is there no dropout of RF signal? initial read area.