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Subject: Re: [Simmons Drums] SDSV Trig Voltage Decrease

From: Jim Barber <lewisbarber@sympatico.ca>
Date: 2015-05-08

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:


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@yahoo.com [Simmons_Drums]" <Simmons_Drums@yahoogroups.com> wrote:


 
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