Yamaha SY85 power board 220v or 110v?

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  • maleksa
    Senior Member
    • Jul 2017
    • 50
    • Malaysia
    #1

    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

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    Tags: None
    • R_J
      Badcaps Legend
      • Jun 2012
      • 9624
      • Canada
      #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

      if you find these attachements useful please consider making a small donation to the site

      Last edited by R_J; 07-01-2023, 11:11 PM.

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        • stj
          Great Sage 齊天大聖
          • Dec 2009
          • 31285
          • Albion
          #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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            • maleksa
              Senior Member
              • Jul 2017
              • 50
              • Malaysia
              #4
              Re: Yamaha SY85 power board 220v or 110v?

              Originally posted by R_J
              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.

                Comment

                • maleksa
                  Senior Member
                  • Jul 2017
                  • 50
                  • Malaysia
                  #5
                  Re: Yamaha SY85 power board 220v or 110v?

                  Originally posted by stj
                  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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