A154 issues
2009-11-10 by mark parsons
Thanks DieterI've re-seated the cable that goes from the controller and into the main boards of the A155 and it now works...well almost!Reset and Clock still don't work. Could that be a cabling issue from the A154 to the (redundant) controller board of the A155? Mark Date: Tue, 10 Nov 2009 09:11:52 +0000
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From: Doepfer_a100@yahoogroups.com
To: Doepfer_a100@yahoogroups.com
Subject: [Doepfer_a100] Digest Number 2849
Doepfer A100 Modular System Group
Doepfer A100 Modular System Group
Messages In This Digest (7
Messages)
1a.
AW: [Doepfer_a100] A154 issues
From:
yahoo@doepfer.de
2a.
AW: [Doepfer_a100] VCO's and the system bus
From:
yahoo@doepfer.de
2b.
Re: VCO's and the system bus
From:
phono 1337
3a.
Only filters rack
From:
amsonx
3b.
Re: Only filters rack
From:
Monroe Eskew
4a.
faulty a124 wasp
From:
atuzzi
4b.
AW: [Doepfer_a100] faulty a124 wasp
From:
yahoo@doepfer.de
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Messages
1a.
AW: [Doepfer_a100] A154 issues
Posted by: "yahoo@doepfer.de"
yahoo@doepfer.de
ddoepfer
Mon Nov 9, 2009 1:48 am (PST)
> Hi all
> I've just picked up a used A154 and hooked it up to the A155
> (correctly...I've double checked everything).
> It's powering up but I'm getting odd sequences:
> On row 1 steps 1 - 2 and 8 are lighting up only and then only 1
> and 8 triggering with a cv.
> On row 2 the same but no cv.
> Switching back to A155 and using an external clock results in the same.
> Disconnect the A154 and use the A155 on its own and everything is ok.
> Could the A154 be faulty?
>
> Regards
>
> Mark
From your explanations I suppose that the A-154 is faulty and has to be
repaired.
Best wishes
Dieter Doepfer
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2a.
AW: [Doepfer_a100] VCO's and the system bus
Posted by: "yahoo@doepfer.de"
yahoo@doepfer.de
ddoepfer
Mon Nov 9, 2009 1:48 am (PST)
> how many VCO's could you theoretically run on the system bus before
> experencing problems with scale?
>
> Paul
It depends upon the buffering of the CV that is connected to the bus. If
A-185-1 or A-185-2 are used I don't expect any problems. As far as I
remember we tested the A-185-x with 4 or 5 VCOs on the same bus.
Best wishes
Dieter Doepfer
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2b.
Re: VCO's and the system bus
Posted by: "phono 1337"
phono1337@gmail.com
phono1337
Mon Nov 9, 2009 7:57 am (PST)
thanks :)
Paul
On Mon, Nov 9, 2009 at 10:48 AM, <yahoo@doepfer.de> wrote:
>
>
> > how many VCO's could you theoretically run on the system bus before
> > experencing problems with scale?
> >
> > Paul
>
> It depends upon the buffering of the CV that is connected to the bus. If
> A-185-1 or A-185-2 are used I don't expect any problems. As far as I
> remember we tested the A-185-x with 4 or 5 VCOs on the same bus.
>
> Best wishes
> Dieter Doepfer
>
>
>
[Non-text portions of this message have been removed]
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3a.
Only filters rack
Posted by: "amsonx"
amsonx@yahoo.com
amsonx
Mon Nov 9, 2009 1:57 am (PST)
I' m planning my modular system and ,cause my low budget, i want start only with filters and modulation source for manglig the output of my Mopho.
Have any suggestion about this ?
thanks in advance
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3b.
Re: Only filters rack
Posted by: "Monroe Eskew"
monroe.eskew@gmail.com
monroeeskew
Mon Nov 9, 2009 11:03 pm (PST)
get a lot, get the good ones, get lfos and adsrs. mopho.
On Mon, Nov 9, 2009 at 1:57 AM, amsonx <amsonx@yahoo.com> wrote:
>
>
> I' m planning my modular system and ,cause my low budget, i want start only
> with filters and modulation source for manglig the output of my Mopho.
>
> Have any suggestion about this ?
> thanks in advance
>
>
>
[Non-text portions of this message have been removed]
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4a.
faulty a124 wasp
Posted by: "atuzzi"
antoniotuzzi@tiscali.it
atuzzi
Mon Nov 9, 2009 2:04 am (PST)
Hello friends (and Dieter...)
I have an a124 that doesn't work:
resonance is audible only after 8
and the mix on the low pass mode seems not work at all
I have another wasp filter, and I exchanged the 2 3080 and the 1458 and the 4069
but the result is always the working one, working and the dead one, dead...
are the 2 bc557b picked with special characteristics ?
thanks
antonio
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4b.
AW: [Doepfer_a100] faulty a124 wasp
Posted by: "yahoo@doepfer.de"
yahoo@doepfer.de
ddoepfer
Mon Nov 9, 2009 2:46 am (PST)
> Hello friends (and Dieter...)
>
> I have an a124 that doesn't work:
> resonance is audible only after 8
> and the mix on the low pass mode seems not work at all
>
> I have another wasp filter, and I exchanged the 2 3080 and the
> 1458 and the 4069
> but the result is always the working one, working and the dead
> one, dead...
>
> are the 2 bc557b picked with special characteristics ?
>
> thanks
>
> antonio
Difficult to make a diagnosis. The next step would be the replacement of the
BC557 (no special characteristics or selection required). And as a last
check I'd take the circuits from the working module to make sure that none
of the replacement circuits is defective. If this does not help the module
has to be sent in for repair.
Best wishes
Dieter Doepfer
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