LG tch-c600 troubleshooting guide free download

File name tch-c600 troubleshooting guide.pdf

13. TROUBLESHOOTING GUIDE NO Is power ON? + Check power supply circuitry. CD Magazine I- Insert. NO w Check Elevator circuitry. I YES - I NO Does initial reading occur? Check laser circuitry. YES v Check focusing circuitry. . - _ Check disc. NO Can disc be played? w Check tracking servo circuitry. I YES I NO Is audio output supplied? w Check Audio circuitry. , I YES I OK - 40 - (1) If display LCD lighting is not normal (without Disc) NO Check voltage in the power NO Power supply circuitry Do display LCD then light? b supply circuitry. * defective. YES Is u-COM IC751 reset circuit normal? Pin 68 YES I Is u-COM lC751 C.L.K terminal Pin 58 (OSC) . NO C751, C752 defective. input? X751 defective. about 4.19MHz YES I Is IC751 Pin 21, 22 output waveform normal? NO +/l_inli YES 1 Is IC751 Pin 23-72 output waveform