Adjust every potentiometer 10 minutes later after turned the power on.
Idling Current Adjustment All power amplifier stage need idling current adjustment after the installation of TRAIT transistor. 1. Connect a voltmeter to CN11 with the correct polarity as indicated by the PCB silk print. 2. Adjust the preset, VR1 to get 8.8mV (Idling current = 20mA) at the voltmeter reading. 3. Repeat step 1 and 2 for all other channels.