Hi Neil,
Since your stuff is second-hand, and hence I/we don't know how old it
is, we'd better just check that we have the same version 110 PCB -
mine are marked 'VERS. 3 C 1997' on the underside (etched in the
copper). However, from what you've described so far, I'm quite sure
we are not a million miles apart..
> can i double check with you that i am correct in thinking that i
> need to replace the wire to connect the INT CV at ST1 to the INT CV
> beside BU2.
Yes.
> this seems to be the only place i have anything missing from. it
> would mean i would need to put in a wire of about 4 inches...ish.
> the points on the INT CV box beside ST1 are connected on mine but
> there is nothing connecting this then onwards to up near BU2 (where
> the external cv jack input is situated).
>
> does this mean that someones removed the long wire rather than
> removing a short link
Yes, I reckon so (unless for some reason Doepfer sell the mini-system
in this config, which seems quite unlikely).
> can you confirm that your a110s have a connection from ST1 to the
> int cv connection beside BU2.
Yes.
The signal path is this: the 'internal CV' on the bus is the second
pair of pins down on the bus connector (see for example manual entry
p9 of the introductory chapter, section 3 'Signal Flow'); this goes
to the 'int CV' pad nearest the edge of the board; the wire is
soldered to this, the other end to the 'int CV' pad right next to the
CV1 socket ('BU2'- BU for 'buchse'= socket/plug in German! ) - you
will see this goes to the socket so that it makes contact when no
jack is inserted, and gets broken when a jack _is_ inserted. On mine,
the second pad of the 'int CV' next to the bus connector does not go
anywhere - if a jumper _were_ installed, then the wire would be
connected to this, so that adding/removing the jumper would
make/break the link. You say these two _are_ connected on yours, I
assume this means on the component side of the board If so, then it
will obviuosly not matter to which one you solder the wire!
If you are still unsure, you could email me off-list, and perhaps we
could talk over the dog-and-bone
Tim