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