ibanez af-9 envelope filter trim pots

[czech-one-2]

greetings from prague!
anybody out there have an old ibanez af9 filter?
id like a sketch of the basic trim pot positions since i dont own and have never used an ocsiloscope!
im getting some distortion from the pedal on decay and ive messed around with the trimmers to no avail.
now i have know idea where they were originally.
there are three,on by itself seems to be bias, the other two seem to adjust the low and high filter tone.
could it be a bad capacitor or resistor?
any mods out there for these?
thanks
bk

[czech-one-2]

ok,sorted that out,bad speaker. but while im here,anybody know of any mods for these. i know analogman can add a ''mix'' pot to blend in a clean signal with the filter effect on an eh q-tron. if anybody knows how to do that to the af-9 you will be my hero! its exactly what this pedal needs as its a pretty synthy and strong filter.the guyatone wr3 has this feature, but my af9 is a mini mutron III and im keepin it.
a little of the clean guitar signal would be the ticket to filter nirvana!
thanks! bk