Kawai • SX-240

Kawai SX-240 Image

The SX-240 is a programmable polyphonic analog keyboard synthesizer with MIDI from Kawai. It was originally released under the Teisco brand-name. It is a well rounded analog synth with 2 DCOs (pulse, sawtooth and sub-osc), a lowpass filter with ADSR envelope, a flexible LFO, MIDI and 48 memory patches. In terms of patch editing, the SX-240 is very much like a Roland Alpha Juno or Moog Source which resort to using a dedicated data-wheel to edit the values of selected parameters when you edit sounds. It also has a built-in real-time 1500 note sequencer and chord memory. And the sequencer can be split into 8 separate 200 note songs, roughly. The SX-240 is cheaper and comparable to similar Sequential synthesizers from this time period like the SixTrak and the Prophet 600, but sound-wise, is not as popular or cool as them or any of the Roland synthesizers either.


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Russell Edghill
Posted 29 days ago
I need information about repairing my kawai sx-240 synth.? I took the battery out before it ruined the unit. What kind of battery do I need to replace the original ni-cad? Where can I get an ion replacement battery? What is the battery # ?Do I need to do any modifications to install an ion battery? I also have lost all the sounds when I took out the battery? Correct? How can I reload the sounds? The unit works without the battery installed but it has no memory. Can anyone send me information or the link to the mp3 file of the factory sound patch dump? I need some information to complete the battery installation. I cut the leads to the battery that was soldered to the circuit board with a wire cutter. I am not very knowledgeable about this synth. I am trying to fix it for my son. I only paid $20 for it at a flea market. It works great. Have I damaged the synth by removing the battery and playing it without a battery in it? Thanks for your reply. raedghill@cox.net
Mark Peters
Posted 31 days ago
Oh, BTW Jesse, Thanks for the link to the mp3 file of the same factory sound patch dump. it worked perfectly.
NOTE: some users may have to "turn up the volume a bit" on this mp3 file to get the load to work as its kinda quiet and some SX240's might not "hear" it too well.
Mark Peters
Posted 31 days ago
Jesse, when the SX240 appears to power off, it is actually waiting for the load data to start. once you see it appear to power down, start your data load. about a minute later, it should come back to life and display "OK" in the text window. Also, the original sound patch restore cassette is still available from KAWAI directly for $3.00! Simply send them an email to Ksmith@kawaius.com, Kent will take car of you!
Jesse
Posted 34 days ago
Mark,

Here ya go. http://www.synthmania.com/sx-240.htm Let me know if you have problems with yours similar to mine. Could it be my battery is dead or has damaged the circuit board??? Thanks in advance. I'll also post direct to your email as well. I sure do hope one thing. That this is a easy and not to expensive fix.
Mark Peters
Posted 34 days ago
where did you find the website with the factory patch sounds?
My original cassette tape has long since died and I have been trying to find anyone with a wav file, cd, tape or whatever of the original sounds/patches cassette or someones backup of sounds.
I had to replace my internal memory battery and lost all sounds ):
karbonarc AT aol.com
 

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