Kawai Synthesizers

my 20+ year old k1 has just started going out of tune, both the tuning 
and octaves are changing randomly.  thinking it's the battery which has 
never been changed.  any ideas?

Hi,

if the battery was screwed, you would lose your presets or the preset 
memory would get corrupt. It should not affect the synth's operation 
when it's turned on. If the tuning changes too, it might be a power 
supply issue. If the octaves change as well, then it's probably a bad 
solder joint or component. Look for leaking capacitors, and retouch 
every solders around the voltage regulator section. A bad solder joint 
could be found by knocking lightly on the components with a non-metallic 
object(a screwdriver handle for example) and listening for changes in 
the sound at the same time.

Antoine

jimtzu2 a \ufffdcrit :

> my 20+ year old k1 has just started going out of tune, both the tuning 
> and octaves are changing randomly.  thinking it's the battery which has 
> never been changed.  any ideas

thanks, i guess i'll open it up and see what's going on inside.  i 
only used it as a simple controller, it was never much but always 
stable.  i'm amazed that it's lasted this long.



--- In kawaisynths@yahoogroups.com, Antoine Deschênes <antdes45@...> 
wrote:
>
> Hi,
> 
> if the battery was screwed, you would lose your presets or the 
preset 
> memory would get corrupt. It should not affect the synth's 
operation 
> when it's turned on. If the tuning changes too, it might be a 
power 
> supply issue. If the octaves change as well, then it's probably a 
bad 
> solder joint or component. Look for leaking capacitors, and 
retouch 
> every solders around the voltage regulator section. A bad solder 
joint 
> could be found by knocking lightly on the components with a non-
metallic 
> object(a screwdriver handle for example) and listening for changes 
in 
> the sound at the same time.
> 
> Antoine
> 
> jimtzu2 a écrit :
> > my 20+ year old k1 has just started going out of tune, both the 
tuning 
> > and octaves are changing randomly.  thinking it's the battery 
which has 
> > never been changed.  any ideas
>