stereo memory man chorus echo with no delay

[domenico]

Hi everybody,
I have a problem with a memory man.

Pcb is labelled EC2020 and the problem is that I can't hear no delay out of it.

The stompbox is based on a mn3005 and probing the pcb I can hear the delayed signal out from the bbd chip.

I can't hear any sound from the output of expander I only hear white noise, the compression side of 571 works well and the signal goes well to the input side of the expander.

I can only hear delay from main and stereo output of the pedal if I remove C41 cap (please see the schematic on flickr http://farm7.static.flickr.com/6171/6266882674_b412b7e1f5_b.jpg) in this case I can hear delay from the expander output too.

But at this point the feedback is going crazy and I can't use the pedal anyway.
Please help I'm going mad with it ! 
Thanks !
Domenico

[domenico]

Can you see the schematic on flickr? Any ideas? Please help me!
Thanks
Domenico

[the3secondrule]

C41 may have gone bad, have you tried replacing it?

[domenico]

Yes I've tried but even with a new one the delayed signal will stop working

[domenico]

I've tried to change all capacitors but nothing...could you please help me ?