hi tim,
thanks for the help again. yeah its second hand so maybe it was
removed for some project or other.
checked the schematics as suggested.
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.
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
can you confirm that your a110s have a connection from ST1 to the
int cv connection beside BU2.

thanks again.
neil




--- In Doepfer_a100@yahoogroups.com , "Tim Stinchcombe
<timothy@t...>" <timothy@t...> wrote:

> Hi Neil,
>
> > with regards to the a110 VCOs,
> > i had a close inspection of the units and the PCBs, after about

15

> > minutes of scrutinising i noticed two boxes printed and labelled
> int
> > cv. one at the bottom right handside, near to the blue

adjustment

> VR
> > and the other at the top left near to where the mini jack for cv
> > comes in.
> > these were both unconnected to anything and had clearly never

been

> > (holes were perfectly clean, no old solder traces etc) and it

was

> > the same on all three VCOs.
> > as an experiment i wired them together on one of the units and

hey

> > presto, full cv response.
> > can anyone confirm that these points should in actual fact have

a

> > wire conencting them together before i go ahead and connect and
> > solder them properly.
> > i suspect so but just would like to check.
>
> When I popped one of my A-110s out last night I only scanned the
> _top_ of the PCB for a jumper, like on the A-140, but didn't see

one.

> It looks like the box next to the bus connector is a provision for

a

> jumper, but Doepfer don't fit it (you'll notice one pad doesn't go
> anywhere, the other goes direct to the bus connector). On both my

A-

> 110s there is a wire connecting these points on the underside of

the

> PCB - if your stuff is second-hand, maybe the previous owner had
> removed them That the wire is on the underside would also

probably

> explain why the holes look 'clean'. So, yep, I'm sure that is the
> answer!
>
> Tim