Hi there, I’m Ron, and I am a Yamaha certified musical instrument technician. I see you’re having some problems with your equipment. I can help you, Let me pull the service manual on this unit, they are on CD so this might take a little time.
OK first thing first. On this model the computer controls the tuning. There is no control you turn to change the tuning. Have you checked it with another unit to confirm it is actually out of tune? If it is do you have the owners manual?
When you get back to me there are other functions that set/change the tuning so it is correctable.
Hello. I was just checking to see if you need any more help or do you have the problem corrected ?