Michael,

with these settings there should be an output signal available:

audio input = VCO output (e.g. A-110 sawtooth)
Delay Clock: ~ 7
Level: ~ 5..7
Feedback: ~ 5
Mix: fully CW
BBD polarity switches: + or - (not center)

If under these settings no signal appears at the output the module has to be
repaired. For the test no external CV is necessary.

In addition you may test the switching contact of the ext. Clk In socket:
Connect the Clk out socket to the ext. Clk In

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von selfoscillate
> Gesendet: Sonntag, 17. August 2008 22:06
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 Re: A-188-1 BBD 4096 problem (probably just me)
>
>
>
> sadly i don't own the service manual for the a188/1 yet,
> so i cannot give you an advice how to do specific tests.
> to be honest, i think you have to send the module in for
> repair, as i have no idea what could be the problem.
>
> dieter is on holidays right now, so we cannot ask him
> until end of next week, maybe he as a better idea than me.
>
> sorry and best wishes
>
> ingo
>
>
>
> --- In Doepfer_a100@yahoogroups.com , "Chidra_100@..." <ChidrA_100@...>
> wrote:
> >
> > Ok chips are secure in their sockets. (3005)
> >
> > Feeding any signal into the audio in has mic output.
> >
> > Although, mix to bbd out 100% and the bbd switch at middle, has signal
> > out, polarity - or + at full ddb mix has no output.
> >
> > Note CV2 in is triangle output of A-145
> >
> > Delay clock makes no sound or jitter. from any polarity settings on
> > bbd, mix or either.
> >
> > It was working 5 min before i sent the email yesterday, it seems as
> > though something has failed internally, maybe ic
> >
> > I only has the A-145 input on cv, it just stopped...
> >
> > If there is any specific way to test the ic chips and board, let me
> > know and i will have a go.
> > Replacements
> >
> > :(
> >
> > Regards
> >
> > Michael
> >
> >
> >
> >
> >
> > On 16/08/2008, at 8:19 PM, selfoscillate wrote:
> >
> > >
> > > hello,
> > >
> > > it is difficult to say what is wrong with your module.
> > > please do some checks on your module, maybe we can
> > > figure it out.
> > >
> > > do you hear the input signal at the mix output
> > >
> > > when turning the clock all the way down in frequency,
> > > do you hear the clock noise at the bbd output
> > >
> > > when turning the feedback to maximum, can you hear
> > > any self oscillation at the bbd output
> > >
> > > can you hear any bbd signal at the mix output
> > >
> > > is the bbd chip (mn3005 or mn3205)
> > > sitting nicely in his socket
> > >
> > > best wishes and good luck :-)
> > >
> > > ingo
> > >
> > > --- In Doepfer_a100@yahoogroups.com , "Chidra_100@" <ChidrA_100@>
> > > wrote:
> > > >
> > > >
> > > > I suspect that my bbd is damaged, is there a sure way to check if it
> > > > it working properly
> > > >
> > > > I was having a go at the standard flanger patch from the bbd manual
> > > > (page 12) and after playing around with the variables, it seems to
> > > not
> > > > giving a bbd output...
> > > >
> > > > Now repatching it doesn't seem to affect the sound at all...
> > > >
> > > > Any advise would be great since i cannot fault find too well as i
> > > was
> > > > only just figuring out how the module works.
> > > >
> > > > Thanks...
> > > >
> > >
> > >
> > >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
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