LG FFH-185 trou free download

File name FFH-185_trou.pdf

TROUBLESHOOTING Turn power on. NO Check power supply circuit. Is power on? (Check PN 501) 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 - 2-3 - Fails to initial read NO Disc motor turns. NO Does laser light? A YES YES B Does RF Does tracking Does signal Does TE2 signal NO NO NO NO waveform servo work? appear at Test appear at pin 53 Defective IC appear? Lower envelope Pin(TEO)? of IC501? 801, pick up Test Pin(RF) of Test Pin(RF) and/or open waveform is flat. wire. 1.3V YES YES YES Detective pattern. Does signal appear at IC 502 Pin 26 and Pin 27 ? NO Defective IC 501 and/or IC 502 YES Defective pick-up and/or connector. Is rotation normal? NO Does GFS (IC503 pin 25) NO show as below? Defective IC 503. YES Is there no dropout of RF Scratch in disc NO signal? initial read area. Defective pick-up YES