yamaha fl-01 flanger irregular woosh

[9 volts]

Hey there, My yamaha fl-01 flanger seems to have an irregular woosh (like the third woosh is longer than the rest). It has four trim pots inside which I've attempted to adjust with no improvement. I did a voltage check on the electro caps and they seem ok. I don't know what voltages should be going to the ic's and don't have a schematic. Anyone got any suggestions? Thanks

[Dai H.]

might have been the same as the Korg FLG-1 IIRC, which there is a schematic for on the internet (someone was nice to put up a bunch of Korg schemos some time ago, and basically they appeared to be the same as a series of Yamaha efx.).

[9 volts]

Thanks I'm in the process of trying to find the Korg FLG-1 schem. It seems like there are two trim pots that control the frequency peaks that greatly influence the whoosh. I suppose I need to find out how to correctly adjust them. Thanks again. ps. pm me if anyone has the schem

[Dai H.]

I can send a copy if you are not able to find one.