I have problem with my Ibanez S450 (hsh, 5way OTAX switch, stock pickups) picking noise. It seems to be 50Hz/100Hz, its level follows volume knob setting, also it reacts to tone control just as a pickup signal. With single coil is most visible, a bit less with humbuckers, h+s and s+h configs seem to be most quiet...
Is it maybe any "common" problem, with well known solution?
I'd like to try rewire everything (provide true star grounding scheme, separate signal ground from shield ground) to try if it helps. Prior doing this, I wanted to check if current wiring follows original diagram - but I cannot find it anywhere (S450 is 1991 model, while wiring diagrams on ibanez webpage are available for models since 1994). I thought it should be similar to S470, but 5way switch seems to be wired other way...
So - anyone knows where could I find S450's wiring diagram?
And - maybe - photos of elecronic cavity of S450/S470 model?