I finally got my R-09 recorder apart to see what's going on with the input jack. I procrastinated until the day before the show that I wanted to tape before deciding to bite the bullet and dive in. The hardest part was figuring out how to get the back plastic part off to expose the third screw for the entire back piece. It turns out that apply even prying-pressure with my nails did the trick. It was easy as that.
I did notice that the solder job on the jack was crappy so I melted the old solder and hit it with new. Unfortunantely, it did not fix the problem. When the plug is inserted into the jack and wiggled the plug, it caused a huge noise spike . They are not as frequent as before, but it will still happen if it is wiggled just right (as when it is in my pocket). I opened it up and re-flowed the solder on all four pads, but no luck. Is the entire jack bad or is it another problem? Thanks.