Copper corrosion? Yamaha HS8S Audio 1 output only

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  • mecha1166
    Member
    • Apr 2011
    • 37
    #1

    Copper corrosion? Yamaha HS8S Audio 1 output only

    OAUD Yamaha HS8S Audio one output only.

    I have pulled the output board. Output txsistors are ok (only 2 main output). Everything measures the same on each side. Customer did not bring in speakers so I cannot go too deep. I did notice a greenish tint on the tip of the solder joints that connect to the COPPER output connectors. All 6 have a greenish tint at the tip - each side has 3 pins each. Anyone else have copper speaker output pins that corrode at the place on the PCB where they are soldered? I will try to add a photo. Thanks.
    Tags: None
    • mecha1166
      Member
      • Apr 2011
      • 37
      #2
      Re: Copper corrosion? Yamaha HS8S Audio 1 output only

      Pictures of board. Last 2 are connections with green hue on tips of solder connections.
      Attached Files

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        • debruina
          Member
          • May 2020
          • 29
          • Nederland
          #3
          Re: Copper corrosion? Yamaha HS8S Audio 1 output only

          Originally posted by mecha1166
          Pictures of board. Last 2 are connections with green hue on tips of solder connections.
          Cn301 looks more a problem. But maybe it's the picture

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