On "octave bass" setting only , which of course is the one used.
A sort of auto-wah effect at the flanger rate but with the effects controls
turned to off position. Alternate peaks of a 200 Hz input signal are
attenuated.
Thats with the gain pot at about 60 percent but above 70 percent then a
cross-over type distortion moves into the attenuated traces as well.
No response to twizzle stick or ribbon connector movement,SM IC pushing etc.
Not fully taken apart yet , but any ideas ?

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Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/