Problem solved ... got my soldering iron and went over each solder point ...
must be cold joint ... but I don't get it why I did get normal operation ...
OK, now, must do some fine tuning in quiet room ...
have another board to do ...
must be cold joint ... but I don't get it why I did get normal operation ...
OK, now, must do some fine tuning in quiet room ...
have another board to do ...
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