There opamps 4750 dual opamp have you checked the psu as if its not working correctly you get distortion on the outputs I had this on my old yamaha an1x wallwart
Ill look at the schematic as I dont see any transistors or jfets in that area you are showing so the muting circuits mogjt be before those
I would get a scope and look at the signal before and after the opamps to see if your getting the correct signals with no distortion thats the only way to see if a opamp is working correctly or not
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-------- Original message --------
From: "mekozbekoz@... [AN1x-list]" <AN1x-list@yahoogroups.com>
Date: 05/11/2014 14:29 (GMT+00:00)
To: AN1x-list@yahoogroups.com
Subject: [AN1x] Re: New AN1x owner, with mainout L/R problems
Hi,
thanks for the info, is this what you are talking about...
http://imgur.com/MliwCNx