Here is procedure to test controllers:

Hi Bernie,
Before you do anything.
Do a “save all”, with everything checked , so that it saves everything.
Also do a “ back up”.

Save the stuff to USB sticks, just in case something is wrong with keyboard.

Better safe than sorry,

Hopefully just some sort of a setting got changed

I purchased a Kurzweil K2600 once and the very upper key would not work. I reinstalled the firmware and that fixed it. I am not saying that is your issue, however, if all else fails you might want to give it a try. It could also be a bad solder joint on the socket of the keyboard. Have you plugged the sustain pedal in and tried wiggling the cable where it plugs into the keyboard, while you depress the sustain pedal a few times. If it works intermittently it could be a bad solder joint.

I tried all the suggestions(thank you) and have ended up with the following success:
1.Sustain working on EC5 and pedal when I am in full mode,for entire keyboard.
2.Working on upper split only. It cuts off at the split point.

I almost never had used the damper, the way I play,but I have just gotten more into piano and noted the above problems. I don't even know exactly what I did to now get full mode sustain,but it is the most important.Secondly would be a sustained piano on a lower split. I am not even sure I can even do this.

The main thing is that I don't believe anything is very wrong with the Pa4X,just the operator.

That is a writable parameter on the 4x. Not sure where it's found, but I know it's there because I turned it off on my LH manual bass.

Interesting Dave, i'll scour the manual. Thanks

Hi Bernie,
I think the above is normal.

In full pianist mode the sustain pedal would cover the whole range of keys.
In split mode, it will sustain to a split point.
Maybe check the global settings for the various options.

On my sx900, I’ve got it set up with sustain to the split point (theirs possibly more options) but it works for me.
If I was more capable of playing left hand/right hand in arranger mode , I’d set it to full pianist mode, but, alas the concept of playing this method still escapes me .haha.

Thanks Rikki,but I can't find any such options anywhere in the Global menu,or elsewhere. I tried Korg forum again,also.

There is an option to set it for sure. If I still had the 4x I could find it. I don't remember which screen for sure, but I would try Global, then Controllers. Should be a row of boxes to tick to select which areas to assign the sustain.
After you find it, check to see if their is a lock pertaining to it, then be sure to press and hold MY SETTINGS, to save to your power-on setup.

Hi Bernie,
I think it has something to do with foot controllers. You need to find the screen page for the below item. I think it has something to do with Global and Controllers as Don said.

Try page 841 “Programming the Damper pedal “( found it on an online manual,) just in case page no’s vary from the original hard copy.


Don’t know if you have to lock or unlock anything page 863 Locking and unlocking (just in case.)