Amplifier machine a single, sound there is no circuit. First turn on the amplifier's rear door, two side cover is to slide back a centimeter out again to play open, because it is plastic buckles, if met strong play damaged casing, any audio repair or amplifier repairs are the same, to know the machine factory to assemble it there must be some way apart. Two cover screws on the side cover is open only to see, remove the lid to check the amplifier circuit. Power transformer out of the AC 8 v, double v, 16 after the rectifier voltage is normal.V9xservice manual download site
V9xservice manual download site
Also put open CD machine cover open, into discs, play Shi movement no any action, description servo decoding are no normal work, measurement Board power, 5 v and plus or minus 9 v normal, 12 v No, led came to CD and amplifier of connection row line, original this group voltage is through row line from amplifier machine for came of, measurement amplifier machine that side voltage normal, description fault in row line and the plug Shang, check plug no rust, introduction feet no off welding, carefully observation row line side a root has broken marks, measurement resistance infinite big, Try this thread after the woman, reading correctly, connect the speaker sound is also normal, and troubleshooting.V9xservice manual download site