Yamaha RX-V671 in protect mode

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  • tibimakai
    Badcaps Legend
    • Jan 2012
    • 3680
    • USA
    #1

    Yamaha RX-V671 in protect mode

    I have picked up this receiver and I'm trying to repair it.
    I have found already some transistors and diode that are blown.
    I haven't get around yet, to check all the components, just the semiconductors and the Emitter resistors. The resistors are fine.
    Digikey has the final transistors.
    I'm having problem finding these components, like:
    2SD2705S
    2SA1770
    2SC4614
    MTZJ5.1C zener
    Any pointers, or equivalents that I could use?
    Any help would be appreciated.
    Tags: None
    • tibimakai
      Badcaps Legend
      • Jan 2012
      • 3680
      • USA
      #2
      Re: Yamaha RX-V671 in protect mode

      I have found 2SA1770 and 2SC4614 at Mouser.

        Comment

        • shaunbt123
          Senior Member
          • Nov 2012
          • 119
          • uk
          #3
          Re: Yamaha RX-V671 in protect mode

          Is this one of the parts you need. (MTZJ5.1C zener) . it also lists an alternative part.


          https://www.encompassparts.com/item/...T2/Zener_Diode
          Last edited by shaunbt123; 03-01-2014, 11:31 AM.

            Comment

            • tibimakai
              Badcaps Legend
              • Jan 2012
              • 3680
              • USA
              #4
              Re: Yamaha RX-V671 in protect mode

              It seems like the right part. Thank you.

                Comment

                • tibimakai
                  Badcaps Legend
                  • Jan 2012
                  • 3680
                  • USA
                  #5
                  Re: Yamaha RX-V671 in protect mode

                  Just an update, I have replaced those components and the receiver still didn't want to show any life.
                  Then I thought maybe I should reset the receiver to clear the protect mode error and then it turned on and since then it's working great.
                  It's a very nice receiver.

                    Comment

                    • Andrew F. Ali
                      Badcaps Legend
                      • Jan 2014
                      • 2450
                      • Trinidad & Tobago
                      #6
                      Re: Yamaha RX-V671 in protect mode

                      I have a receiver like this.
                      How did you reset this unit?
                      What procedure did you use??

                        Comment

                        • tibimakai
                          Badcaps Legend
                          • Jan 2012
                          • 3680
                          • USA
                          #7
                          Re: Yamaha RX-V671 in protect mode

                          I don't remember, but here it is the service manual:
                          http://elektrotanya.com/?q=showresult
                          After clicking on it, you will have to wait like 15-20 sec. and a Get Manual will appear below the service manual's picture.

                            Comment

                            • Andrew F. Ali
                              Badcaps Legend
                              • Jan 2014
                              • 2450
                              • Trinidad & Tobago
                              #8
                              Re: Yamaha RX-V671 in protect mode

                              Thanks, Man
                              AFA

                                Comment

                                • Brianwitty
                                  New Member
                                  • Dec 2014
                                  • 1
                                  • USA
                                  #9
                                  Re: Yamaha RX-V671 in protect mode

                                  I'm about to start work on one of these- first post noob here guys sorry- I have worked on a number of tube amps but this will be my first modern solid state av receiver. There is no sound. It was pushed hard in a home theater system that the speaker wires got compromised by mice. It first lost some speakers, then all. I'm guessing all of the output transistors need to be replaced, but have not tested it yet... Any advise?

                                    Comment

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