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Yamaha SY85 power board 220v or 110v?

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    Yamaha SY85 power board 220v or 110v?

    I need help to ascertain if the power supply on my Yamaha SY85 keyboard is 110v or 220v or both.

    I have attached the schematics below.
    Attached Files

    #2
    Re: Yamaha SY85 power board 220v or 110v?

    What is the voltage rating on C11? From a picture I found it is 150µf/200v which would suggest the power supply is for 110v ac input only
    Attached Files
    Last edited by R_J; 07-01-2023, 11:11 PM.

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      #3
      Re: Yamaha SY85 power board 220v or 110v?

      does it have R3 fitted? i suspect that is used for 220-240v regions.

      btw, typical japanese shit - they fitted the wrong fuse!
      it should be ceramic for mains use - not glass

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        #4
        Re: Yamaha SY85 power board 220v or 110v?

        Originally posted by R_J View Post
        What is the voltage rating on C11? From a picture I found it is 150µf/200v which would suggest the power supply is for 110v ac input only
        Yes it is rated at 200v. You are right, the power supply is for 110v AC.

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          #5
          Re: Yamaha SY85 power board 220v or 110v?

          Originally posted by stj View Post
          does it have R3 fitted? i suspect that is used for 220-240v regions.

          btw, typical japanese shit - they fitted the wrong fuse!
          it should be ceramic for mains use - not glass
          No R3 is not fitted. I have also got confirmation from another Yamaha SY85 owner that my keyboard model is for 110v AC.

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