Doepfer

After the Monday-of-doom, I replaced my fuse, plugged in my modules.
They seem to work... with one exception.


When I plugged in the A-190, my two oscillators produced nothing but
weird, very low-level ring-mod-y noise. 

I tried plugging in the A-190, *without* the AD5 - same problem. 
I tried plugging in the AD5 alone - no problem.


1) Has anyone had an A-190 cause this?
2) Could it be a problem with the AD5 instead?
3) Could it be some weird short on the +5v part of the rail instead?

I've no idea what to replace, or whether to look elsewhere in the box
for some other cause.

Any help - as ever - much appreciated.

Dene

P.S. I also found I started getting slight shocks from the case after
use... :-( makes me very nervous.

My simple advice is to get a multimeter and learn how to use it. Check 
for shorts between your power rails, and maybe take your problem A-190 
and the 5V regulator out of the case and check for shorts between the 
power pins there as well. If all this is too much to figure out on your 
own, then take it to an electronics specialist and let them do it for 
you. Of course, if it's still under warranty you could send it all in 
for service.

Best!
D.

madrayken wrote:
> After the Monday-of-doom, I replaced my fuse, plugged in my modules.
> They seem to work... with one exception.
> 
> 
> When I plugged in the A-190, my two oscillators produced nothing but
> weird, very low-level ring-mod-y noise. 
> 
> I tried plugging in the A-190, *without* the AD5 - same problem. 
> I tried plugging in the AD5 alone - no problem.
> 
> 
> 1) Has anyone had an A-190 cause this?
> 2) Could it be a problem with the AD5 instead?
> 3) Could it be some weird short on the +5v part of the rail instead?
> 
> I've no idea what to replace, or whether to look elsewhere in the box
> for some other cause.
> 
> Any help - as ever - much appreciated.
> 
> Dene
> 
> P.S. I also found I started getting slight shocks from the case after
> use... :-( makes me very nervous.


-- 
derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
---Oblique Strategy # 132:
'Remember .those quiet evenings'

One further wrinkle - and please forgive me for my ignorance here.

I can't get the A-190 to do anything at all - i.e. even the menu's are
inoperative. 

My A-190, AD5 and oscillators normally live on my top rail, so I the,
to the lower rail. 

The same problem occured - but only if I manually patched the CV1 out
to my oscillators. Normally, I'd take that to mean that the AD5 or
A-190 were dead. 
So, just for information's sake: 

1) Is the A-190/AD5 combination supposed to send gate and CV
information to both rails, or just the one they are attached to?

2) If the AD5 was dead, would that result in a totally inoperative A-190?

3) If the A-190 were dead, would that result in the oscillators on the
same rail receiving stupidly low CV information?

Many thanks for your patience.



--- In Doepfer_a100@yahoogroups.com, "madrayken" <dene.carter@...> wrote:

>
> After the Monday-of-doom, I replaced my fuse, plugged in my modules.
> They seem to work... with one exception.
> 
> 
> When I plugged in the A-190, my two oscillators produced nothing but
> weird, very low-level ring-mod-y noise. 
> 
> I tried plugging in the A-190, *without* the AD5 - same problem. 
> I tried plugging in the AD5 alone - no problem.
> 
> 
> 1) Has anyone had an A-190 cause this?
> 2) Could it be a problem with the AD5 instead?
> 3) Could it be some weird short on the +5v part of the rail instead?
> 
> I've no idea what to replace, or whether to look elsewhere in the box
> for some other cause.
> 
> Any help - as ever - much appreciated.
> 
> Dene
> 
> P.S. I also found I started getting slight shocks from the case after
> use... :-( makes me very nervous.
>

Thanks, folks.

--- In Doepfer_a100@yahoogroups.com, Florian Anwander <fanwander@...> 
wrote:
>
> Hello
> 
> > 1) Is the A-190/AD5 combination supposed to send gate and CV
> > information to both rails, or just the one they are attached to?
> Just to the one it is attached to.
> 
> > 2) If the AD5 was dead, would that result in a totally 
inoperative A-190?
> Yes
> 
> > 3) If the A-190 were dead, would that result in the oscillators 
on the
> > same rail receiving stupidly low CV information?
> Yes this might be - but I never tested it ;-).
> 
> 
> I definitely subscribe the recommendation of Derek. Learn a little 
bit 

> more about electronics and learn to handle a voltmeter.
> 
> Florian
>

Hello

> 1) Is the A-190/AD5 combination supposed to send gate and CV
> information to both rails, or just the one they are attached to?
Just to the one it is attached to.

> 2) If the AD5 was dead, would that result in a totally inoperative A-190?
Yes

> 3) If the A-190 were dead, would that result in the oscillators on the
> same rail receiving stupidly low CV information?
Yes this might be - but I never tested it ;-).


I definitely subscribe the recommendation of Derek. Learn a little bit 
more about electronics and learn to handle a voltmeter.

Florian