Thanx a lot!
I was working on this amp today.
Yes, you are right TR 25,39,41 are on the heatsink.
And yes, the adjustment for the Bias is (#2 red) or trimmer pot RV 19/20 - it should be 10mV.
I could adjust this today perfectly.
My DC offset right now is: - 50mV on both channels the same. I...