Kawai K3 repair?

[Chuxpix]

I was just given a Kawai K3 synth and several of the keys don't work. Is there a simple fix for this or does anybody know where I might find a service manual for this keyboard?

I am also missing the sustain pedal. How hard are these to find?

[polardark]

Depends. It could be any number of things.

If there is a regularity to the "missing keys" (like one or two keys missing for every octave over the entire keyboard range) an internal keyboard cable might've come loose. If so, the fix is easy. Open up the case and make sure that the cable leading from the circuit board with the keys to the main circuitboard is properly connected.

It could also be a question of dirty contacts. There are a few different ways of fixing this, depending on just how the keyboard mechanism is constructed.

Don't even consider doing anything yourself if you don't consider yourself "handy" or have the right tools for the job

[Maschinengeist]

Usually just a matter of cleaning the contacts underneath the keys. That's the first thing.

But depending of what keys are defective (like 1 each octave, etc), this could be an IC problem. This you can do nothing on your own. See a tech.

If you've got sharp eyes and a magnifier, you can inspect solder joints of the headers/flat straps. A crack can do some trouble. Almost impossible to see naked eye. You them must redo the solder joints.

As for the service manual, I have it. But it won't be of no use if you are not a technician or someone with knowledge in electronics. It's so technical that you'd fall from your chair. A service manual will never tell you how to fix a problem like dead notes on the keyboard. In fact, most of the time it won't tell you about nothing (like do this to fix oscilliator 1, or this to stop output left's distortion). A sercive manual is made for the tech, with rough datas and a bunch of schematics. The tech job is to make sense of it all so he can fix problems. A service manual can't compare to the owner's manual, which is made for everyone to understand.

I can provide a copy if you insist (but it's not free) but I warn you that it won't solve your problems and that it's pretty dry reading.