Hi Markus,

> I didn't find any hint at the Doepfer page. Any other idea

After checking some of the history on this problem, I realised I too
had this problem when I first got my A-111 (over 4 years ago), and
the solution then, by EMIS the UK distributor, was to replace the
CEM3340 chip. In an old email I had written to Dieter at the time, I
mentioned that specifically grounding the hard sync input did *not*
cure the problem!

However, checking past messages, the last time this appeared seems to
have been post #9193, about a year ago: one of the follow-up posts,
#9203, contained the suggestion from Dieter about grounding the hard-
sync input, but checking my module against what he says doesn't make
sense, as the switched contact on mine is *not* grounded (but I'm
guessing on new modules they solder across the gap). Hence I suggest
the following:

Insert a patch lead into the hard sync socket, and *deliberately
ground the tip at the other end*.

If this cures it, have a look at the switched contacts on the hard
sync socket - these are the two on the very end of the board. I
suspect that they are bridged with solder: if they are, then probably
a new socket is needed; if they are not, then bridging them with
solder will have the effect of always grounding the hard sync line
when no plug is inserted, which hopefully should then give a
permanent solution.

If inserting and grounding the lead doesn't totally remove the
problem, then I suspect you'll need a new chip as I did!

Tim