Ibanez PT9 problem

[airhole]

Hi there guys,

my friend brought his Ibanez PT9 to me (thinking I am a whiz in all things electronics, gahh..)

the pedal does not phase. There is signal when bypassed and there is also a slightly thicker sound when the switch is engaged. the signal sounds the same regardless of the position of the knobs

I figured it might be a gain problem, so I took out all the transistors and re-soldered new ones. But it had the same outcome. The only thing else I can think of is that the LFO circuit is out of action.

Can anyone possibly point out a schematic for me to work the circuit out? Or maybe pointers on what I could/should be looking for?

Thanks a million!

cheers,
George