Yamaha Clavinova CVP-55 Ground noise over OPTIONA IN RCA's
I can't put any RCA on OPTIONAL IN because this input has a lot of ground noise. I have an MU-90 tone generator designed for this input and can't operated via CVP-55 amplifier.
The noise is over the speakers or headphones. ONLY with OPTIONAL IN RCA's (included connecting only the RCA cable without any other machine in the other side of the cable).
I checked visually and check cable connections inside Clavinova but all is right visually.
Any help please?
All the info is in this post, it's mine:
Thanks a lot