Emax

Hi, I think one or more of the voices in my Emax 1 are out.  Every
time I make 
a second or fourth sample, their sound is barely audible.  Actually,
I was 
thinking the problem may instead be the a/d converters inside the
emax.  I say 
this because other pre-existing presets have no dead voices when
loaded 
from HD.  If either of these are the case, is there any kind of fix?
Thanks,
Peter