Friends, my 2012 JTV69s has the scratchy volume pot problem when in modeling mode only, and when using a 1/4" cable (haven't checked to see if it happens when using Workbench HD and the VDI cable). No scratching noise when in the magnetic pickup mode. When the Volume knob is rotated vigorously back and forth about 8 times, it will go away - but only for a moment - then the scratching sound quickly returns.
I also have a faulty input Jack (1/4") causing poor signal that's correctable if the Jack plug is wiggled around several times. This annoyance occurs with any Cable used. The condition is very bothersome, forcing me to sadly avoid relying on the JTV69s for gigging. I dislike the thought of spending $40+ to get a replacement Jack, and running the risk of worsening the guitar if I re-install the Jack incorrectly somehow. The nearest listed Line6 Authorized repairman is in North Jersey - a 3 hour drive from me, and I would prefer to avoid shipping the guitar due to risk. I've replaced many guitar electronics over the years and a Jack replacement shouldn't be too difficult, however, the Variax is a more sophisticated animal. I removed and inspected the JTV69s's input Jack to bend the pin in closer to the jack probe, but it really didn't solve the problem.
Any suggestions you can offer to remedy the above problems I'm having would be greatly appreciated. With thanks in advance for your reply.