mex wrote:I just tested your suggested route, which does the dc offset:
R162 - R128: brings the correct 5,33 V where it should be and cuts it down to 0,7 Vafter R128, I guess this is right, but there could be a error at least.
It definitely is not right. You need to have over 5 volts after R128. My guess is that a defective BA6110 is pulling the voltage down.
Remove the BA61100 and measure if you get the 5.33 volts on the solder pads for pin 6 und 7.