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  #1  
Old 08-13-2013, 08:32 AM
la reine mab la reine mab is offline
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Default Casiotone CT-301...

Hi ! my CS01 works fine, and now i would like midify my old casiotone CT-301. its an analog polyphonic keyboard.
is there is someone who try to do this ?

i found an old doc that explain the the key matrix and other mod, but, its a bit difficult for me...need help !

http://www.firstpr.com.au/rwi/casio/casio-mod-01.pdf

la reine mab - france
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  #2  
Old 08-13-2013, 02:15 PM
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Hi la reine mab, welcome to the forum.

I don't have experience with the CT-301, but if the key switches are matrixed as described here:

http://forum.highlyliquid.com/showthread.php?t=1133

...then there is a good chance that the UMR2 will work. Can you post a sketch or schematic of the key switch matrix?
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Old 08-15-2013, 12:00 PM
la reine mab la reine mab is offline
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Hi, i can't find the service manual !!!
so i took pictures :
http://www.flickr.com/photos/1003374...7635077165195/
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Old 08-19-2013, 04:40 PM
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Quote:
Originally Posted by la reine mab View Post
Hi, i can't find the service manual !!!
so i took pictures :
http://www.flickr.com/photos/1003374...7635077165195/
Thank you for the pictures. Unfortunately I can't provide connection instructions based only on pictures.

Luckily, a service manual is not required. You can inspect the keyswitch PCB to determine the schematic. If you can post a sketch, it will allow me to give you the wiring instructions.

See Figure 8 in the keyboard matrix article for an example of the type of schematic I'm looking for.
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Old 08-26-2013, 04:03 PM
la reine mab la reine mab is offline
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Hi, Thanks !
i will do it...
but it needs time......so........soon
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Old 01-01-2014, 10:17 AM
la reine mab la reine mab is offline
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Default trying to........

Hi,
the way of the note high and low are inverted, but seems correct to undertstand....


could you help me ?
it seems similar to the casio MT210....?
it is not the CT301 but the casiotone CT 403 full analog
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Old 01-09-2014, 08:52 PM
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Do you know the voltage level of the signalling? (do you have an oscilloscope to measure it?)
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Old 01-17-2014, 08:24 AM
la reine mab la reine mab is offline
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HI, i have not oscilloscope, but a an analog tester.
and i was surprise of the result : maybe i'm wrong, but the voltage was approximately 0,875 volts !!!! surprising
il will do the mesure better than i did...
thanks
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Old 01-17-2014, 12:32 PM
la reine mab la reine mab is offline
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hey, you want to say : voltage when keys is pressed end despressed .
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Old 01-22-2014, 01:53 PM
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It can be tough to get a voltage measurement without an oscilloscope, because a multimeter will "average" the signal to give you a DC value. That is the reason for your reading.

My best guess for this matrix is active-low polarity. If you can find a 5V supply point for the UMR2, you can try doing the setup procedure to see if it works. If the setup procedure does not work as expected, then there's a good chance that the wiring is incorrect.

Proceed with caution. There's always a chance of damaging the UMR2 and the host keyboard if the correct wiring hasn't been identified with certainty.
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