The Kawai & Teisco Analog Synths Group

It may take you a while but it definately worth it !

Clean all corrosion, replace ICs touched by the corrosion and chips 
that directly interfere with them, rewire the corroded traces.

You can use the computer board schematics in the Files section.

Use sockets when replacing ICs.


--- In kawai_sx210@yahoogroups.com, "Mark Daborn" <darkest.yugo@n...> 
wrote:
> Hi,
> 
> I now have my SX-210 and it's in a bit of a bad way.
> When turned on for the first time all the lights where on and 
nothing appeared on the display. It also made no sound apart from a 
faint high pitched static noise.
> 
> I started to explore the settings and found every one to be on 99. 
So i reduced things like noise, hpf, res, vca/vcf attack times and it 
made a nice full sound.
> 
> I began to suspect that it hadnt been switched on in a while and 
the battery was dead. Poly8 mode barely works. Only occasional notes 
play. Poly4 is better and it seems pretty much okay in mono mode. 
Some keys dont sound at all while others play notes without regard to 
envelope settings.
> 
> So i opened it up and found a nice orange crystal growth around the 
battery and some corrosion of IC legs in the general area. The wires 
that link the trwo main boards looked sound enough but had a touch of 
corrosion at their joints. It looked surprisingly neat and tidy in 
there, not at all like the innards of my Jen SX1000.
> 
> I intend to take the two boards to work with me tomorrow 
(fortunately im an electronic technician so i have the tools!!) and 
give them a proper going over as well as getting a replacement 
battery.
> 
> The longer ive had it on, ive seen subtle improvements in its 
behaviour. For ecample, i can now store patches and recall them.
> 
> I hope i can get this thing to work because i had it making a sound 
not too far away from a CS80. Oh and i like the "LFO START" button. I 
think it should really be called the "Complete Madness" button 
instead!