Hi there and thanks for all posts. Well, let me try to describe what's going on with my unit right now. Both imputs ( Mic and Line) presenting the same problem:if you insert the plug all the way, only one channel works. If you pull out the plug a little bit you'll find a spot where both channel works. I'm kinda concerned, because if this only a matter of soldering, I can handle the problem. My concern is that the problem is located in the jack itself.
Any thoughts? Thanks
Sergio