Sony STR-DH520 no optical input

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  • alfatv
    Badcaps Veteran
    • Sep 2020
    • 353
    • Canada
    #1

    Sony STR-DH520 no optical input

    Hi guys,
    This is my own (actually present to gf) amp which I am not even using so much.
    Recently started to use optical input from TV which worked great.
    However recently the link went down.
    Few days ago I opened it up, cleaned PCBs from dust, then came back to life.
    But today it did the same thing again.
    On TV when I change setting from speakers to just optical and other way around, audio comes up only for very short moment.
    There are 2 optical inputs, both behave same way.
    I found schematic which is attached.
    I hope this forum experts can point in right direction, thanks.
    Attached Files
    Tags: None
    • jons
      Senior Member
      • Feb 2014
      • 59
      • Latvia
      #2
      Re: Sony STR-DH520 no optical input

      Either that digital input receiver IC is dying or there's some cold solders on that input board would be my first guess.

        Comment

        • Devil_rider
          Member
          • Jan 2023
          • 33
          • United States
          #3
          Re: Sony STR-DH520 no optical input

          Any other optical source or Amp to test the TV also? The fact that it works when you change settings on TV would make me look at TV first.

            Comment

            • alfatv
              Badcaps Veteran
              • Sep 2020
              • 353
              • Canada
              #4
              Re: Sony STR-DH520 no optical input

              Working again right now.
              It was the same problem with another TV and with another optical input of the amp.

                Comment

                • Devil_rider
                  Member
                  • Jan 2023
                  • 33
                  • United States
                  #5
                  Re: Sony STR-DH520 no optical input

                  All digital inputs are going to digital interface ic 2006. Check the power for noise/ ripple and you probably did that but reseat connectors on digital board to main board.

                    Comment

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