Pioneer VSX-531

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  • mferna14
    Badcaps Legend
    • Jun 2018
    • 1015
    • Canada
    #1

    Pioneer VSX-531

    Does anyone have the Schematics diagram for Pioneer VSX-531???
    The HDMI LED starts to blink & this is the protective mode. I checked all the Transisors array on the power transistor board, all the transistor seems to be fine, but as soon as I plug the cable into CP403 socket, the HDMI starts to blink. This cable is coming out of the main board at the botton where the big caps are located & out there too I do not see any short. Without this cable attached the receiver works fine & the display & all modes works fine. means something short???
    Tags: None
    • madan1
      Badcaps Veteran
      • Nov 2016
      • 680
      • Bulgaria
      #2
      Re: Pioneer VSX-531

      Have you checked the schematics of the previous models?
      I'm sure pioneer uses the same power amp board in previous models. Most likely you will find and the schematics of the smart parts ( the mainboard(s) ) but with some ICs missing.

        Comment

        • SMDFlea
          Super Moderator
          • Jan 2018
          • 20593
          • UK
          #3
          Re: Pioneer VSX-531

          This service manual might help
          Last edited by SMDFlea; 01-22-2020, 05:21 AM.
          All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

            Comment

            • R_J
              Badcaps Legend
              • Jun 2012
              • 9535
              • Canada
              #4
              Re: Pioneer VSX-531

              CP403 supplies B+ and B- for the amp outputs. You likely have shorted output transistors in one or more channels. Check the voltage on each pin of CP402, they should be near 0 volts
              Last edited by R_J; 01-21-2020, 05:11 PM.

                Comment

                • madan1
                  Badcaps Veteran
                  • Nov 2016
                  • 680
                  • Bulgaria
                  #5
                  Re: Pioneer VSX-531

                  Originally posted by R_J
                  CP403 supplies B+ and B- for the amp outputs. You likely have shorted output transistors in one or more channels. Check the voltage on each pin of CP402, they should be near 0 volts
                  Hm, you just made me download some VSX manuals... damn, when I first saw "pioneer" and "8kg" for a 5channel AVR I immediately thought - class D amp!
                  The lightest AVR with similar output specs that I've seen was 12kilos... but damn.. accounting and marketing departments at their best!

                  Anyway... op, download the service manual from the link in the above posts and see how to enter the service mode. Try to see the recorded errors with disconnected CP403

                    Comment

                    • andyb1712
                      Member
                      • Oct 2018
                      • 41
                      • United Kingdom
                      #6
                      Re: Pioneer VSX-531

                      Pioneer AVRs after 2015 are made by Onkyo and have equivalent models.

                      The service manual for TX-SR373 has references to the VSX-531 so I think the schematic for the amp is likely to be the same.

                      The TX-SR373 manual is available from ElektroTanya

                        Comment

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