Sorry, but I forgot to mention that I did the readjustment [without scope], but things stay the same. But it was remarkable that:
1. only the Y2 bal. could minimize the signal appearing; but it did it very well.
2. the signal did not get as high as before, when turning fully with the Shift knob. And it hears like the signal is not a real sinus/cosinus; its a bit different like before.
Today I remembered I tried to make the simple A126_A143_9_connection years ago. But something went wrong and I decided to cancel the mod, because other things got priority.
And now I wonder if I try it again succesfully, that I do not need the internal osc.
And if it then works well with the extern osc of A143_9, can one say that the CEM was broken
Thanks for offer repairing, but I want to challenge it, otherwise I just wait for the upcoming new FS.