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