1981 V6 EH Electric Mistress.
http://www.metzgerralf.de/elekt/stomp/mistress/electric-mistress-v6.shtml

I dug this pedal out this week, having last used it a few months ago. It’s my spare.
I have done nothing to it since last using it, but inexplicably it’s decided to stop flanging.
I have no idea why.

Bypass works fine.
The “filter” mode works (or whatever that other effect is, the metallic kind of effect).
Switch to flange and it stays in the same mode, so which ever position the switch is in, I only get that filter effect.

There are no strange noises in bypass or active mode.

I have tried using 9V battery as well as without battery and with direct power instead, and in isolation of other pedals.
Nothing makes any difference.

I have opened it up and checked for any broken solder / wire connections and can’t find any.

Has anyone had a similar problem and / or have any ideas how I can solve this?

Thanks!

http://www.imagebam.com/image/c00f97439299378

http://www.imagebam.com/image/49fc11439299406

http://www.imagebam.com/image/11d14c439299443