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 Forum index » DIY Hardware and Software » Circuit Bending
Circuit Bending Casio MT68
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looperama



Joined: Mar 22, 2014
Posts: 1
Location: scotland

PostPosted: Sat Mar 22, 2014 5:27 pm    Post subject: Circuit Bending Casio MT68 Reply with quote  Mark this post and the followings unread

Hi,

I would like to do a very simple alteration to my Casio MT68- I'd like to mute the bass in the Auto Accompaniment. I've seen people adding a switch to do this in pictures online, but I'd be happy just to mute it permanently.

I haven't done any circuit bending before. Can anyone tell me how to find the path I will need to cut?

Thankyou,

Stuart
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wax+wire



Joined: Sep 28, 2014
Posts: 9
Location: Australia

PostPosted: Sat Feb 28, 2015 6:39 am    Post subject: Reply with quote  Mark this post and the followings unread

i think i've done this with my MT-46. the process would be similar.

get a speaker/headphones/amp+guitar cable and connect the ground of the speaker to the ground and the *signal* to a probe.

Probe around on the PCB until you hear just the part you want (or don't want). If you want a 'bass off' switch, cut the trace where you can hear just the bass of the accompaniment and solder a switch over it.

In the MT-46 the accompaniment elements all come out of a CPU type IC and flow along traces before running flowing through a resistor and mixing all together.
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scorpiistar



Joined: Feb 28, 2007
Posts: 9
Location: australia

PostPosted: Tue Mar 03, 2015 5:17 am    Post subject: schematic Reply with quote  Mark this post and the followings unread

im trying to attach the schematic......the bit youre interested in


this should help you out........the service manual,is available online


image.jpg
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mt65/68 schemo
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