Yamaha DTXpress/DTXplorer/DTXtreme

I hadn't played my kit with my DTXpress-I for about three weeks and 
when I went to play the other night, all my custom saved kits were gone.
What a drag having to setup all my kits and sounds again!
Is there a battery for the memory in the DTXpress I? If so, is it user 
changeable? If it's not a battery issue, any other thoughts on what 
would cause this to happen?
Thanks,
Brian

--- In DTXpress@yahoogroups.com, "bncarty" <bncarty@...> wrote:
>
> I hadn't played my kit with my DTXpress-I for about three weeks and 
> when I went to play the other night, all my custom saved kits were gone.
> What a drag having to setup all my kits and sounds again!
> Is there a battery for the memory in the DTXpress I? If so, is it user 
> changeable? If it's not a battery issue, any other thoughts on what 
> would cause this to happen?
> Thanks,
> Brian
>

Brian,

It has a battery in it.  I think Yamaha say you need to send it to
them, but the picture in the photos section kindly done by OGD of the
DTXpress II shows it is simply a lithium button cell in a holder. 

http://launch.ph.groups.yahoo.com/group/DTXpress/photos/browse/6db2

If you take the lid off your DTXpress you should be able to see if it
is the same on your version.

Keith.

I looked at the photos of the insides of the DTXpress.
Where exactly is the battery? I had trouble spotting it.

Brian:  you've backed up your patches to a computer, right?
That would get you out of this jam.

cheers,
Andy

--- In DTXpress@yahoogroups.com, "Andy Citron" <andycitron@...> wrote:
>
> I looked at the photos of the insides of the DTXpress.
> Where exactly is the battery? I had trouble spotting it.

Andy,

On the first of the two photos it is the round shiny thing towards the
left hand side of the picture.

Keith.

--- In DTXpress@yahoogroups.com, "Keith" <keith@...> wrote:
>
> --- In DTXpress@yahoogroups.com, "Andy Citron" <andycitron@> wrote:
> >
> > I looked at the photos of the insides of the DTXpress.
> > Where exactly is the battery? I had trouble spotting it.
> 
> Andy,
> 
> On the first of the two photos it is the round shiny thing towards 
the
> left hand side of the picture.
> 
> Keith.
>
Keith,

I wonder whether it would be better for battery life to keep the 
module running all the time. 

Ed

--- In DTXpress@yahoogroups.com, "emf" <liberatusvirus@...> wrote:
> Keith,
> 
> I wonder whether it would be better for battery life to keep the 
> module running all the time. 
> 
> Ed
>

Ed,

Without taking mine apart and measuring the leakage current it is
difficult to say.  Often the current taken to hold up the memory by a
backup battery is no more than the self discharge of the battery
itself, although the discharge will always be slower while the power
is on.  Temperature makes a huge difference to leakage currents, so a
module kept in a hot climate will discharge quicker.

Maybe it's time to backup my kits!

Keith.

Thanks for the info folks. Much appreciated. I haven't had a chance 
to take it apart yet, but sounds easy enough.  

--- In DTXpress@yahoogroups.com, "Keith" <keith@...> wrote:
>
> --- In DTXpress@yahoogroups.com, "bncarty" <bncarty@> wrote:
> >
> > I hadn't played my kit with my DTXpress-I for about three weeks 
and 
> > when I went to play the other night, all my custom saved kits 
were gone.
> > What a drag having to setup all my kits and sounds again!
> > Is there a battery for the memory in the DTXpress I? If so, is it 
user 
> > changeable? If it's not a battery issue, any other thoughts on 
what 
> > would cause this to happen?
> > Thanks,
> > Brian
> >
> 
> Brian,
> 
> It has a battery in it.  I think Yamaha say you need to send it to
> them, but the picture in the photos section kindly done by OGD of 
the
> DTXpress II shows it is simply a lithium button cell in a holder. 
> 
> http://launch.ph.groups.yahoo.com/group/DTXpress/photos/browse/6db2
> 
> If you take the lid off your DTXpress you should be able to see if 
it

> is the same on your version.
> 
> Keith.
>

--- In DTXpress@yahoogroups.com, "bncarty" <bncarty@...> wrote:
>
> Thanks for the info folks. Much appreciated. I haven't had a chance 
> to take it apart yet, but sounds easy enough.  
> 

Taking things apart is ALWAYS easy - getting them back together is the
tricky bit ;-)

Keith.

--- In DTXpress@yahoogroups.com, Corey Dixon <doxxon3@...> wrote:
>
> From a chemical standpoint,  leaving the module on all the time would
> more than likely shorten the overall life of the battery ...

I cannot agree with the suggestion that it flattens the battery more
to leave the unit turned off.  These are lithium primary cells with a
shelf life of well in excess of 10 years.  In other words, if you
don't take any current from them, in 10 years they still have
significant power left in them.  If you discharge some power from the
battery then once it's gone, it's gone - the lifetime will reduce. 
All the manufacturers' data I have on lithium primary cells supports
this view.

If the backup batteries were lithium ion or lithium polymer secondary
cells then the answer may be different.

Keith.

--- In DTXpress@yahoogroups.com, Corey Dixon <doxxon3@...> wrote:
>
> Sorry for the delayed response, I've been away... I was under the
impression that the back ups were lithium ion, in which case my point
would be correct.  Thanks for clarifying.
>    
>   -Corey

Corey,

Yes, LiIon/LiPoly are totally different.  They discharge at an
alarming rate, some up to 15% per month.  Also, letting them go
completely flat can lead to permanent damage.

Keith.