Roland D50 reverse problem

[Allby]

Hi,
I have a problem with my Roland D50.

When pressing keys on keyboard it is silent but when releasing keys off it plays a note!!
anybody know what is going on with keyboard .. how to fix that???*

Best
Allby

[Jazz P Bass]

For starters, here is the service manual;
Link: Free Service Manuals and Handbooks Download -- Roland D-50 Keyboard
I would suggest reading this post.
http://music-electronics-forum.com/t21165/
In this case, it was a $2.00 SRAM IC.
The part# was IDT 6116SA15TPG.

[Allby]

Thank you, Jazz P Bass,

I'll check the links.

Cheers.

[Enzo]

ANy chance your keybed was unplugged from the circuit boards and was then reconnected incorrectly? That is what your description sounds like to me.

Is it many keys or just one or two?

[Allby]

Hi Enzo,

Is the entire keyboard.
Somebody told me that could be the Dyna Scan.

Any idea where can I get one?

[Jazz P Bass]

If it where my repair, I would not rip into the unit & replace something without knowing why.
You have the service manual and the informative post that I linked to.
I think it is time to troubleshoot the problem.

[Enzo]

I agree with Jazz, let us find out we need one before we start throwing parts at it.


Seriously, if the cables are on wrong, exactly what you describe can happen. It may be something else, but it sure is worth a quick check.

[Allby]

Enzo,

I was using it normally, the problem started one day to another, when I turned on the keyboard.