I have a Behringer GMX212 V-Tone guitar amp which uses a 2 x LM3886T power amp (stereo). There is no output on either of the chips. I eventually replaced both chips. There is still no output. I cannot find a circuit diagram for the Behringer amp so I searched for LM3886T application ccts. I injected a signal at pin 10 (input) but get nothing at pin 3 (output). No components measures strange. Supply voltage is -36v, 0v, +36v. Anybody that can help? What function will pin 8 (mute) have in this application?
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