Xpantastic!

Hi,

One voice on my Xpander does not seem to respond to the addition of FM, otherwise it 
functions and sounds fine. All six voices pass all the self tests.

From the service notes, it looks like FM is handled by an AD7523 IC. Anyone know if this is 
the culprit?

Thanks.

Hi ktfiz,

Lets hope it's not the AD7523. This part is rare anymore.I would bet 
it's the bypass capacitor Cx02. Where x is 2,3,4,5,6,7 depending on 
the voice number. It's a 2.2 uF @ 50 V electrolytic capacitor. We 
have seen the same value cap fail alot lately in expander/M12.   
Best Regards
Karl




--- In xpantastic@yahoogroups.com, "ktfiz" <k.tomasson@...> wrote:
>
> Hi,
> 
> One voice on my Xpander does not seem to respond to the addition of 
FM, otherwise it 
> functions and sounds fine. All six voices pass all the self tests.
> 
> From the service notes, it looks like FM is handled by an AD7523 
IC. Anyone know if this is 

> the culprit?
> 
> Thanks.
>

Thanks, I will try replacing the capacitor first. Hopefully that will be the cause of the 
problem.

ktfiz

--- In xpantastic@yahoogroups.com, "Karl" <shire03@...> wrote:

>
> Hi ktfiz,
> 
> Lets hope it's not the AD7523. This part is rare anymore.I would bet 
> it's the bypass capacitor Cx02. Where x is 2,3,4,5,6,7 depending on 
> the voice number. It's a 2.2 uF @ 50 V electrolytic capacitor. We 
> have seen the same value cap fail alot lately in expander/M12.   
> Best Regards
> Karl
> 
> 
> 
> 
> --- In xpantastic@yahoogroups.com, "ktfiz" <k.tomasson@> wrote:
> >
> > Hi,
> > 
> > One voice on my Xpander does not seem to respond to the addition of 
> FM, otherwise it 
> > functions and sounds fine. All six voices pass all the self tests.
> > 
> > From the service notes, it looks like FM is handled by an AD7523 
> IC. Anyone know if this is 
> > the culprit?
> > 
> > Thanks.
> >
>