... i have a rare problem the key od D# and A# 3th octave sounds perfectly .. but when i press D second octave and hold it .. D# and A# dont work anymore.. only this 2 key... if i dont press the D in second octave everything works as usual..
Hi humpe322,
I think there is a
hardware defect in your S950: It is probably due to either the
key matrix (circuit boards MK-L and MK-H) or the
key scanner circuit (board EMKS61A or IC1 "E-LKS"). (See also the attached picture.)
The device should be checked by a Yamaha service technician.
P.S.
You can download the S950 Service Manual here:
>>>
https://psrtutorial.com/lessons/workshops/ServiceManuals.htmlBut only reading this manual or running the internal Test program will probably be of no use in this case. As I said, an experienced service technician should look at this ...
Best regards,
Chris
[attachment deleted by admin]