YAMAHA CLP-550 without of sound

[AlexVG]

Hi.
I have an old YAMAHA CLP-550 without sound. (Some times I can get some kind of noise or distorted sound)
I have replaced all green marked elements, but it gave me nothing.
The IC12 chip LC9116A-105 (red marked) remains under suspicion yet.

But it is custom YAMAHA's chip, and I can't find any information about it.
Maybe somebody came across with the same issue?
Any information will be very useful. I will be very appreciated.
Thank you.

[stj]

forget that.
read the roms - they are compatable with 27c040
these old yamaha keyboards are all losing their memory now.

if you search the forum their is a long thread where we dumped several keyboards to get a single good set of chip dumps.

[stj]

here:
https://www.badcaps.net/forum/troubl...eyboard-output
and
https://www.badcaps.net/forum/troubl...p550-rom-codes

[AlexVG]

Yes. Thank you!