The Kawai & Teisco Analog Synths Group

--- In kawai_sx210@yahoogroups.com, "Mark Daborn" <darkest.yugo@n...> 
It would be impossible to create a patch, with the parameters jumping
around. If the traces are not visually damaged, I suspect poor
connection / contact somewhere.

Hope you can locate the problem without destroying the sx.





wrote:
> Hi, my SX-210 is still non functioning.
> 
> At present, after replacing the battery which had leaked everywhere,
poly 8 mode produces mostly silence except occasionally when the
correct tone sounds. The other occasions when it makes a sound, its
almost as if its disregarding the parameters and creating a random patch!
> 
> Poly 4 mode only seems to have two voices sounding one of which is a
shrill tone, the other almost appearing normal. When it does decide to
make a noise, that is.
> 
> Mono mode just makes the loud shrill sound as if the filter is wide
open with a lot of resonance.
> 
> The leds on the front seem to light up in random order and for other
parameters than the one pressed!
> 
> Has anyone had or heard of similar behaviour as this? I plan to
fault find the main pcb as soon as i can get a chance to do it. Any
clues as to where to start first would be appreciated!
> 
> Someone i spoke to seemed to think that the due to the leaking
battery, the board might have absorbed some of it and is creating
shorts. It has been suggested that i soak the pcb in de-ionised water
to try to draw out the conductive ions.
> 
> Thanks for all your help. If anyone has a copy of the service
manual, that would assist me no end!