Hello, I require the complete diagram of Mixer Behringer XENYX X1222USB, or maybe the guidelines of the solution to the following problem came to me a MIXER which the output has the very weak sound when the volume increases, in the speakers the sound is heard very softly, when checking it, find a burnt SMD CI and the plate is charred in that area, which belongs to CHANNEL 3 of the inputs, the equipment turns on perfectly, only the detail is in volume and in moments it has a buzzer, search google for the technical sheet of the aforementioned integrated and there is no information about it, if someone could provide me with the diagram to accelerate the repair I will be very grateful, greetings to all.