Qx1202usb Service Manual Hot | Behringer Xenyx

The summing amplifiers for the main L/R outputs run at Class-A bias on the output stage. If the manual's test point voltages are off (e.g., you read +16V on pin 8 instead of +15V), the chip will idle at 80mA instead of 15mA. Result: The chip becomes too hot to touch. The service manual shows the trim pot VR2 for adjusting the virtual ground.

: If all compressor lights stay on and a persistent hum occurs, it often indicates a faulty internal component or a ground loop. Phantom Power Issues : behringer xenyx qx1202usb service manual hot