The Yamaha AN1x Synthesizer mailing list

>a friend of mine was delighted to
>get an An1x in exchange for a XP10.
>Now a really weird problem appeared on his new machine:
>  any F and B key doesn't trigger any sound !!!
>
>have you ever had this ???
>do you know what could be ?

This sounds like a problem with the electronics that scan the keyboard.  Modern keys don't directly connect to their sound source; instead, they are connected into row/column digital scanners, like those of a computer keyboard, and then the scanner decides which notes are played.  If we look at the keyboard in that way:

C  = 1 (any C)
C# = 2 (any C#)
D  = 3 (etc.)
D# = 4
E  = 5
F  = 6 *****
F# = 1
G  = 2
G# = 3
A  = 4
A# = 5
B  = 6 *****

It looks like the electronics for column #6 is out of whack.  It's possible that it could be a loose connection on a cable or an IC socket, but more than likely, it needs to have some part(s) replaced.

Regards,

-BW

--
Bruce Wahler
Design Consultant
Ashby Solutions\ufffd   http://consult.ashbysolutions.com
CloneWheel Support Group and HiNote moderator
978.386.7389  voice/fax
bruce@...