Vintage Simmons Drums (UK) Users Group

Simmons_Drums@yahoogroups.com wrote:

> Message 1 
>     From: "evening_soundgate" evening@...
>     Date: Fri May 5, 2006 7:52am(PDT) 
> Subject: SDS7  battery replacement
> 
> Does anyone know what the battery voltage is in an SDS7?
> I need to replace mine and i can't seem to find any indication of the
> voltage.

On mine it was a 4.8v lithium (or thereabouts).  I used 3 AA batteries 
soldered together and taped onto the inside of the case, in 
time-honoured fashion.  You'll find a similar arrangement inside my 
ESQ-1, JX-8P, Polysix, various Suns and Mac G3 (and probably others).

Gordon.

Gordon, 

Thanks. Was the original Simmons battery lithium? I thought that it
might have been a nicad. Anyway, it's dead and needs replacement.

All of this started when I came home to find my SDS7 in an unhappy
state, black display with all button LEDs lit and that faint odor that
means trouble. :-{

On inspection I discovered that one of the diodes on the memory board
was fried and the battery was *completely* dead. 

I replaced the diode and removed the battery, and just to see I turned
the unit on - now I get strange flashing lights, but nothing else
useful. Perhaps the circuit needs the battery in place but my fear is
that the memory board is fried.

off to buy a battery holder..


john

--- In Simmons_Drums@yahoogroups.com, Gordon JC Pearce <gordon@...> 
> On mine it was a 4.8v lithium (or thereabouts).  I used 3 AA batteries 
> soldered together and taped onto the inside of the case,