Yamaha DTXpress/DTXplorer/DTXtreme

Chris,
 
I little followup. I did a little more surgery, i.e. disconnecting 
leads, splicing.

When you disconnect the piezo in the pad 1, the rim switches in pad 
1 will not trigger on their own. I then patched a piezo from a 
second mono pad 2 on the other side of the kit directly to the 
ring/sleeve  of a plug that goes directly into the module. I then 
patched the rim switches from pad 1 onto the tip/sleeve of the plug 
that goes directly into the module. If you strike the the piezo on 
pad2 at the same time as you strike the pad1 rim switches the rim 
switches will trigger the correct voice assigned to the rim.

So in other words, even though there isn't a direct connection in 
the pad it self between the piezo/rim FSR, the module does need a 
near simultaneous strike from both the piezo (no matter how little 
the strike is) and from the rim switch in order for the rim switch 
to trigger the Dtxpress module.

Once I get some of the newer pads that are coming out after NAMM, I 
will do some more destructive surgery on some of the older pads. 
(i.e. un-soldering, removing resistors, etc.) 


OGD


--- In DTXpress@yahoogroups.com, "feefer2" <feefer2@y...> wrote:
> Hi OGD,
> 
> Hmmm, interesting.  Thanks for the info.
> 
> It should be very straightforward to solder together a 'y' cable 
> (with series resistor in the ring 2 pathway) to use a Roland 
> CY-12R/C or CY-15R (3)-zone pad in one of  the newer Yamaha 
> modules.
> 
> Maybe not important to you guys (who would just buy the 
> PCY150), but nice for those of us who have Roland guys who 
> may want to convert pads to be compatible with the DTXtreme IIS 
> module (depending on what else happens at NAMM)....
> 
> Chris
> 
> --- In DTXpress@yahoogroups.com, "oldguydrummer" 
> <rdamon@m...> wrote:
> > --- In DTXpress@yahoogroups.com, "moosetication" 
> > <moosetication@y...> wrote:
> > > OGD, anything obvious from the circuitry when you 
> disassembled 
> > yours?
> > > 
> > Stewart/Chris,
> > 
> > The tip/sleeve are run separately through two resistors R1 & 
> R2 to 
> > the connector CN1 that has the two leads that goes to the 
> piezo on 
> > the metal plate on the pad.
> > 
> > The ring/sleeve are run separately from the piezo circuitry. The 
> > ring circuit is split into to pathways, one circuit is run 
directly 
> > to the rim 1 FSR and the second circuit is run through a 
> resistor to 
> > the rim 2 FSR.
> > 
> > Thus a large current passed through the ring/sleeve circuit is 
> > interpeted as rim 1 triggering and a small current passed 
> through 
> > the ring/sleeve is interpeted as rim 2 triggering. 
> > 
> > There is no connection between the circuitry of the piezo and 
> the 
> > rim switches.
> > 
> > The TP-65 has the same PCB as the TP-65S, except the single 
> > resistor  R3 and Connnector CN2 are not present.
> > 
> > OGD