Random notes playing byitself

andalve · Post by **andalve** » Mon Jul 28, 2014 7:35 pm

Hi, i was playing with my Kronos and it started playing byitself some random notes, it happens with all the sounds.
Here is a video (sorry for the low quality and my bad english)
https://www.youtube.com/watch?v=C8x0voR ... e=youtu.be

<iframe width="853" height="480" src="//www.youtube.com/embed/C8x0voR9r_A" frameborder="0"></iframe>

Please let me know if you have any fix or an idea of why this is happening.
Thank you! Pura vida!

SanderXpander · Post by **SanderXpander** » Mon Jul 28, 2014 7:50 pm

Never seen anything like it. I could imagine a loose connector causing something like it but my first attempt for a fix would be rebooting, I guess you've tried that?

It doesn't look like you have any midi or USB gear hooked up?

andalve · Post by **andalve** » Mon Jul 28, 2014 9:58 pm

SanderXpander wrote:Never seen anything like it. I could imagine a loose connector causing something like it but my first attempt for a fix would be rebooting, I guess you've tried that?

It doesn't look like you have any midi or USB gear hooked up?

I tried rebooting indeed, it works for a while, or it gets fixed, then an hour, a day, or even a week later it comes back again. I just hope that it doesn't happen in a gig!....
And no, i don't have anything plugged in on the keyboard.

Yuma · Post by **Yuma** » Tue Jul 29, 2014 12:15 am

If you have a backup of a working PCG-file, then try to reload that and see if the issue is still there.

Pouyakhoshgoo · Post by **Pouyakhoshgoo** » Tue Jul 29, 2014 4:06 am

How mist(or misty---moisture) is your place?!
( thought it might not be because of moisture)

Anyway here is what i would do if it was my Kronos:

Under the keys there should be a soft plastic layer with small black carbon dots on them for each note.
And under them there should be the solid plastic kit.
When you press a note those carbons are forced downwards and they touch that Solid kit and this is how you hear the sound.
Now, sometimes because of dust or moisture those two layers get connected without the force or any pressure on the Keys!
What you can do( if you want, and if you think you can open your Kronos and remove those keys and Soft plastic rubber) is to take that rubber out, gently clean the whole rubber including those black carbon spots.
Then use a black pencil( preferably the one which is a bot oily- have you noticed that when you write with some black pencils, or you draw something with them on a paper its a bit shiny??- by saying OILY i mean those pencils!)
Anyways, take that pencil and draw on those black carbon things very gently until you see that shininess...
( you can even wash that plastic rubber, just make sure you don't use any soap or something similar to that, JUST HOLD IT UNDER THE WATER FLOW)
If you wanna wash it make sure you do it before using that pencil. And DRY it first, with a hair dryer ( not very hot)

Once done, put everything back, and 99.9% its gonna be OK!

Same thing happened to one of my yamaha Keyboards, I've done the same thing and its working like the first day i bought it!!!

Take picture of every step so you don't forget anything when you are putting back all those parts.

I wish i could send some pictures of my yamaha to show you what i did... But i dont know how to do it in the forum.

Anyway, I'm pretty sure that its gonna be fixed like this!

But its UP TO YOU!

Pouyakhoshgoo · Post by **Pouyakhoshgoo** » Tue Jul 29, 2014 4:38 am

http://www.youtube.com/watch?v=xD7933loa4w

have a look at this video, this is what i did( with a black pencil)

andalve · Post by **andalve** » Tue Oct 07, 2014 10:20 pm

Pouyakhoshgoo wrote:http://www.youtube.com/watch?v=xD7933loa4w

have a look at this video, this is what i did( with a black pencil)

Do you mean this?

I did what you told me and it didn't worked, i bought the pencil that you told me and did it on all the contacts and it still happens, also, before i did that i started to notice that some keys (specially the ones on the bottom) are not triggering any sound, do you think that all the contacts or the problem is the ribbon? Or is there any chance that the problem is the software?

Thank you!

Pouyakhoshgoo · Post by **Pouyakhoshgoo** » Wed Oct 08, 2014 12:23 am

.......?!!!?!
Let me talk to my friend who is really good in these things....
I'll get back to you again...
It seems like contact strips are not the problem here....let me ask my friend...
By the way, did you try reloading all the PCGs etc?!

Did you reset the Kronos?
Also you said some of the bottom notes are not triggering anything at all... Are they working now?( i mean after using the pencil?!)

andalve · Post by **andalve** » Fri Oct 10, 2014 3:39 am

Here is a video of what is going on right now (the main problem continues but not so often)
<iframe width="854" height="510" src="//www.youtube.com/embed/64-i_ICdqhQ" frameborder="0"></iframe>

Yuma · Post by **Yuma** » Fri Oct 10, 2014 11:20 pm

You're currently troubleshooting the hardware. Have you troubleshooted the software as well already?
That's why I wrote:

Yuma wrote:If you have a backup of a working PCG-file, then try to reload that and see if the issue is still there.

I had some unexplainable random issues with the Kronos before.
They disappeared the moment I loaded a backup of a working PCG-file.

andalve · Post by **andalve** » Sat Oct 11, 2014 1:33 am

I don't have that PCG back up file to be honest, do you think that i can do a factor reset with the disco that i got with the keyboard or that will save the existing PCG file?
By the way thank you for your help

Yuma · Post by **Yuma** » Sat Oct 11, 2014 1:03 pm

You could try and load only the global settings part of the PRELOAD_V2.PCG file in your FACTORY_V2 folder.

1. Go to the Disk Load page.
2. Open the FACTORY_V2 folder.
3. Select the PRELOAD_V2.PCG file.
4. Press the Open button.
5. Folders appear for Set Lists, Programs, Combis, etc. You are now looking inside the PCG file.
6. Select the Global Settings and press the Load button.

AntonySharmman · Post by **AntonySharmman** » Sun Oct 12, 2014 2:36 am

andalve wrote: have a look at this video, this is what i did( with a black pencil)

No offence , but those methods like creating a coating layer over the main surface of a key contact using carbon and
lead filings is totally nonsense !
Most of you do not know that this particular flexible carbon type contact has variable resistor properties that controls
velocity under conductance and you definitely can't reproduce those velocity curves with silly pencils or repair kits that
will turn your keybed response discontinued !
We never repair key contacts of such complex keyboards with decades of logic velocity curve parameters with other than the original ones !

My advice is to purchase a non residue , smooth ammonium cleaning liquid with no alcohol or corrosive properties and
clean all your key contacts again !
Your problem is not a bad key contact issue but a continuous conductivity of a key contact in your C1 octave area that has
been caused probably by dust / little junk and moisture and not a software issue !

andalve · Post by **andalve** » Mon Oct 20, 2014 3:26 pm

AntonySharmman wrote:
My advice is to purchase a non residue , smooth ammonium cleaning liquid with no alcohol or corrosive properties and
clean all your key contacts again !
!

Hi Sir! Thank you for your advise, may i know wich specific product do you recommend or where can i buy it online?

AntonySharmman · Post by **AntonySharmman** » Mon Oct 20, 2014 8:24 pm

andalve wrote:may i know wich specific product do you recommend?

You'd better ask in a electronic store for a non corrosive & oil-free , "smooth" contact residue cleaner that is used
for PC screens and Keyboard surfaces.
In my case I always use ammonia based crystal cleaner liquid like ordinary with vaporizer we use at home !