hello david,

the service manual should contain all available schematics.
this manual can be ordered just like the rest of the a100.

best wishes

ingo




--- In Doepfer_a100@yahoogroups.com , David Salter <david.salter@r...>
wrote:

>
>
> Where can I get copies of the schematics
>
> regards
>
> David Salter
>
> Tel: +44 20 7542 2402
> Mob: +44 7990562402
> Fax: +44 20 7542 2699
>
>
> -----Original Message-----
> From: Bakis Sirros 2
> Sent: 11 June 2003 10:20
> To: Doepfer_a100 group
> Subject: Fwd: AW: 1 doepfer's answer about the

jumpers/switches issue.

>
>
>
> --- Dieter Doepfer <hardware@d...> wrote:
> > From: "Dieter Doepfer" <hardware@d...>
> > To: "Bakis Sirros" <synth_freak_2000@y...>
> > Subject: AW: 1 info from doepfer about
> > the development of the A107 and the A154.
> > Date: Wed, 11 Jun 2003 10:59:40 +0200
> >
> > > -----Ursprüngliche Nachricht-----
> > > Von: dasfonk@w... [mailto:dasfonk@w...]
> > > Gesendet: Mittwoch, 11. Juni 2003 00:39
> > > An: Doepfer_a100@yahoogroups.com
> > > Betreff: Re: 1 info from doepfer
> > about the development of
> > > the A107 and the A154.
> > >
> > >
> > > hi,
> > >
> > > I´d rather like to see jumpers, so I can modify
> > the A-154 and have my
> > > own special unique custom version ;-)
> > > Seriously, folks: I don´t see the point why
> > Doepfer use jumpers so
> > > often. Adding a switch isn´t that expensive and
> > the users will
> > > appreciate this. It makes a huge difference if you
> > can just hit a rocker
> > > switch or if you have to unscrew your module from
> > the case, re-position
> > > the jumper and mount the module back in the case.
> >
> > It is always a problem to decide which
> > functions/parameters of a module will
> > be available as controls at the front panel. For
> > jumpers it is obviously to
> > the user that they could be replaced by switches at
> > the front panel. But
> > thats not the whole truth. There are a lot of other
> > "hidden" functions that
> > could be available as front panel controls too that
> > have no jumpers on the
> > pc board. The first modules we designed had no or
> > only a few jumpers. But
> > this does not mean that these modules do not contain
> > "hidden" features. For
> > newer modules we decided to add jumpers as they are
> > extras withouts costs
> > (the few cent will not change the final price) and
> > enable the user to add
> > functions that are not available for the standard
> > module as - from our point
> > of view - they are not that important. But of course
> > it is a question of
> > taste if a certain function makes sense.
> >
> > If you are an electronic engineer and look at the
> > schematics of a module you
> > will find a lot of possible functions that could be
> > added as controls at the
> > front panel. E.g. you could short circuit or turn
> > off certain electronic
> > parts to modify the behaviour of a circuit, replace
> > fixed resistors by
> > potentiometers, add inputs and outputs and many
> > more. But you have to find
> > out which control element is worth to be available
> > at the front panel.
> >
> > E.g. for nearly each filter it would be possible to
> > add outputs (e.g. each
> > filter stage) or inputs (feeding the audio signal to
> > another point of the
> > circuit). For an ADSR you could add a lot of outputs
> > that e.g. tell you the
> > duration of the attack or decay stage. One could add
> > an bypass switch to
> > each audio or CV processing module (we discussed
> > this as we started the
> > A-100 but decided to omit the bypass function as the
> > shining examples from
> > Moog and others did not have this feature).
> >
> > You can start an endless discussion which
> > features/inputs/outputs/controls make sense for a certain module.

But

> > we as a manufacturer have to find the
> > compromise between
> > features/price/controllability/width/date of
> > availability
> > and many other parameters. It will never be able to
> > satisfy all users and I
> > know that we have to live with that problem. This is
> > why I think that
> > something like the DIY page is a good idea (.... OK,
> > I know the momentary
> > stage if far from beeing useful but it is still a
> > non-official page and only
> > made known to the Yahoo group).
> >
> > Regards
> > Dieter Doepfer
> >
> >
> >
>
>
> =====
> synthfreak(parallel worlds)
> athens-greece
> 1 group owner
>
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