Doepfer

Since today, when I start-up my system there's one 134-1 with a strange behaviour.

When the module starts up the two leds are blinking, and they will go blinking faster and faster until both keep lit. When I turn the panning-pot, nothing happens, they both keep lit, as connected to a LFO....nothing....

Anyone any idea???

Cheers and thanks,

Danny

Hello,

I'm sorry about the problems with the module. I cannot remember that we ever
had a similar problem. The LED should not blink unless an external CV (e.g.
from an LFO) is applied. I suppose that the module has to be repaired and
follow the repair notes on the FAQ page of our website:

www.doepfer.com > English > FAQ > General > Repair procedure

If you are familiar with electronics the DIY repair notes may help:

www.doepfer.com > English > FAQ > A-100 > DIY repair tips

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com]
> Gesendet: Sonntag, 16. Juli 2017 19:09
> An: Doepfer_a100@yahoogroups.com
> Betreff: [Doepfer_a100] A-134-1 problem
>
> Since today, when I start-up my system there's one 134-1 with a strange
behaviour.

> When the module starts up the two leds are blinking, and they
> will go blinking faster and faster until both keep lit. When I
> turn the panning-pot, nothing happens, they both keep lit, as
> connected to a LFO....nothing....
> Anyone any idea???
> Cheers and thanks,
> Danny

Hi Danny

Am 17.07.2017 um 08:18 schrieb syndromeda@telenet.be [Doepfer_a100]:
> Anybody an idea what to do know?
1.) Switch off the system
2.) remove the A-134-1 and disconnect it from the supply bus
3.) switch on the system and check whether the -12 volts are available again
      * if yes -> the module needs repair
      * if no
4.) switch off the system
5.) remove all modules from the rack, do not keep any module connected 
to the power bus
6.) switch on the system and check whether the -12 volts are available
      * if no -> shot on the supplybus or powersupply broken
      * if yes
7.) switch off the system
8.) mount the first module
9.) switch on the system and check whether the -12 volts are available
      * if yes -> do the loop from 7.) with the next module
      * if no -> you have found the module which causes the -12 volts to 
break down.

Florian


-- 
http://www.florian-anwander.de

First of all I'd recommend to remove all modules to make sure that the fault
is not caused by another module.

If you are a bit familiar with electronics you may alternatively disconnect
the bus boards from the power supply and look at the control LEDs of the
power supply.

If the -12V are still missing without anything connected the supply is
faulty. From your message I cannot see which power supply you have in use.
If it's an A-100PSU2 probably the -12V voltage regulator is defective. If
it's an A-100PSU3 the -15V module may be defective or the -12V voltage
regulator.

The following link to our website may be also helpful:

www.doepfer.com > English > FAQ > A-100 > My A-100 system does no longer
work

Best regards
Dieter Doepfer
__________________________________________________________________

Doepfer Musikelektronik GmbH
Geigerstr. 13
82166 Graefelfing / Germany
registered in Munich/Germany, commercial registry HRB 97 399
CEO's: Sibille Heller, Dieter Doepfer
European VAT ID No. DE129329318
website: www.doepfer.com
__________________________________________________________________


Best wishes
Dieter Doepfer

> Later on I noticed it was not only this module with strange
> behaviour...even some modules didn't even work anymore in that
> case.....so the final point is that I have no more minus 12
> Volt...! That's the reason for all.
> Anybody an idea what to do know?
> Thanks,
> Danny

Thanks very much for your answers Dieter, it really helped me out.

The (strange) story....When I pulled out the 184-1 I had back my -12V, now the strange thing, when I plugged it back in, I kept the -12V, so everything is ok now.

Now I'm a 99% sure the module was build in right...I always check at least 5 times...

Strange....but thanks very much for the help, this way it was fixed in a few minutes.

Have a nice time,

------------------------------------------------------ 
Danny Budts 

[ mailto:info@syndromeda.be | info@syndromeda.be ] 

[ http://www.syndromeda.be/ | www.syndromeda.be ] 
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----- Oorspronkelijk bericht -----
Van: "yahoo@doepfer.de [Doepfer_a100]" <Doepfer_a100@yahoogroups.com>
Aan: "Doepfer a100" <Doepfer_a100@yahoogroups.com>
Verzonden: Maandag 17 juli 2017 09:40:04
Onderwerp: AW: [Doepfer_a100] A-134-1 problem

Hello,

I'm sorry about the problems with the module. I cannot remember that we ever
had a similar problem. The LED should not blink unless an external CV (e.g.
from an LFO) is applied. I suppose that the module has to be repaired and
follow the repair notes on the FAQ page of our website:

www.doepfer.com > English > FAQ > General > Repair procedure

If you are familiar with electronics the DIY repair notes may help:

www.doepfer.com > English > FAQ > A-100 > DIY repair tips

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com]
> Gesendet: Sonntag, 16. Juli 2017 19:09
> An: Doepfer_a100@yahoogroups.com
> Betreff: [Doepfer_a100] A-134-1 problem
>
> Since today, when I start-up my system there's one 134-1 with a strange
behaviour.
> When the module starts up the two leds are blinking, and they
> will go blinking faster and faster until both keep lit. When I
> turn the panning-pot, nothing happens, they both keep lit, as
> connected to a LFO....nothing....
> Anyone any idea???
> Cheers and thanks,
> Danny



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