> If inserting and grounding the lead doesn't totally remove the
> problem, then I suspect you'll need a new chip as I did!
thanks for your help. I found out that the connections an the
sockets/switches are ok; so the CEM3340 seems to be faulty. Since the
rest seems to be working well, I will not replace the CEM but add a
comparator for the PW/PWM instead, like in the A-110.