Just started to suspect that the use of improper user will be sent to the user after the repair. But the user a song Cara OK, the machine and smoke, and again repair, and let the user note when using the volume of small tones, but the microphone away from the speaker, but the time is not long, [fault] is still. After let the user to move the speaker, open the cause of the failure of the speaker side of the speaker inspection, the horn is not wrong,tDSservice manual download site
Frequency divider is also very normal, the horn is not more than the horn is not a problem. Helpless. Had to give the user another new power amplifier trial. But back to the user box on the day of the new power side is very hot, not dare to use. So let the user put the amplifier and speakers all moved to check. When the other speakers are connected to other speakers, the problem is not the power amplifier, but in the speakers, so the two speakers opened the contrast inspection. At first glance, two sound components corresponding to the same, but the each component individually contrast examination found no [failure] speakers divider capacitor C capacity and annotation of the same, and another [failure] speakers on the capacitor C, the annotation is 4.7 F, but measured capacity is not a 4.7 F, doubt the leakage phenomenon, for the capacitor after the test machine, machine all normal,tDSservice manual download site