I am afraid I must agree with Florian on both points. The ghost images are most likely improper triggering of the oscilloscope. And when I saw your comment about the DAC, after you described the symptoms, I was very surprised. Probably it's time to get some professional help with the repair.
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Re: [PolySix] Re: Trying to Restore a P6.
2017-05-05 by Bob Grieb