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I purchasesd an Yamaha MC600T organ recently. After leaving the instrument 'On' for one night, I lost the sound on the PEDALS, all of them. Could it be just a fused, a transformer....? I am and old Electrical Engineer (elderly...) and I do not have a schematic for the instrument. Gaston

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Most Yamaha organs used IC divider technology. The first step would be to determine whether the power supply is putting out the correct voltages. A quick check with a signal tracer would rule out problems with the IC which is the tonal source for the instrument. It is also possible a buss wire has fallen...or any wire for that matter has come undone. Get a bright light and carefully visualize all the connections. A loose hanging wire or connector would be the tip off. Without more information, this is the best I can offer.

If the organ is still under the warranty, contact Yamaha for free repair.

Have a great day!

Posted on Sep 13, 2009

Testimonial: " Your solution is too general a kid could have done it. You either did not understand the problem, look at schematics or you dont know the instrument."


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