Vintage Simmons Drums (UK) Users Group

I found that the SDSV will do some strange things once in a while, and to resolve these issues I wiggle the circuit boards which re-burnishes the contacts on the circuit board connectors.  I would try this.  There are also plastic pin guides that align the circuit boards in the connectors.  If you are missing one or so, a board may be inserted in-correctly which may make 2 modules work together in the mixer.

Have you tried triggering on 10 volts?  If it works I would just leave it.  I have triggered mine with a lower input voltage but only a couple of times.  


Jim Barber
lewisbarber@sympatico.ca




> On May 7, 2015, at 10:01 AM, Nick Zampiello newallianceeast@yahoo.com [Simmons_Drums] <Simmons_Drums@yahoogroups.com> wrote:
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> 
> make sure that the cards are properly seated in the back plane.  there is a little tab that is supposed to keep the cards aligned that easily falls out. 
>  
> NEW ALLIANCE EAST!!!!
> 
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> On Thursday, May 7, 2015 8:48 AM, "lackan110f@... <mailto:lackan110f@...> [Simmons_Drums]" <Simmons_Drums@yahoogroups.com <mailto:Simmons_Drums@yahoogroups.com>> wrote:
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> 
>  
> Hi everybody!
> 
> I am new to this group, and the reason I am here is that I recently bought a SDSV-brain with 5 modules. I had a couple of questions and electronic obsession-Jesper thought it might be a good idea to pop them up here. 
> 
> First:
> I am triggering the SDSV with a +10V trig signal. But the DSDV prefers +15V. Since the trig inputs are wired with a 100kOhm to ground, I tought decreasing this resistor might lower the SDSV's need for 15V to 10V. 
> 
> Has anybody done this? What is a good value to aim for?
> 
> Second; 
> I think that the mixer section might be faulty in some way since slot 4 triggers slot 6 as well. First I thought it was a mod of some sort but it isn't. And the sensitivity pots don't seem to do much either. 
> 
> But my question is - how does one removing the mixer section? It is multi-pin soldered to the back PCB and the trafo sits on the right wall? Its like a chinese puzzle… :-)
> 
> Thanks for reading this far, best regards Peter in Stockholm
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