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Yamaha RX-V373 automatic shutdown after 5 seconds

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    Yamaha RX-V373 automatic shutdown after 5 seconds

    Hello,

    I am new to this forum and this is my first post. I was googling and found this forum with experts in Yamaha repairing. i would be thankful if someone could help to fix my receiver. When starting the self diagnostic mode it shows a dc_prt 255H message and shuts down after 5 secods. By checking the service manual downloaded from i found that the voltage at the power amplifier DC voltage is high.

    I have removed the cover to check for any burnouts or leakage bu didn't find any. I have all the tools to start checking and repairing but i need some guidance were to start.

    Any help would be appreciated!!

    #2
    Re: Yamaha RX-V373 automatic shutdown after 5 seconds

    Usually, I just go to the final transistors and measure for short.

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      #3
      Re: Yamaha RX-V373 automatic shutdown after 5 seconds

      i couldn't find the final transistors i can only see the capacitors, resistors and relays at the outputs.
      I got the service manual from manualslib.com/manual/1082963/Yamaha-Rx-V373.html

      Comment


        #4
        Re: Yamaha RX-V373 automatic shutdown after 5 seconds

        Please upload good clear pictures using 'Go Advanced' so we can see what we are dealing with.
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

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          #5
          Re: Yamaha RX-V373 automatic shutdown after 5 seconds

          output devices are generally fastened to large heat-sinks

          Comment


            #6
            Re: Yamaha RX-V373 automatic shutdown after 5 seconds

            I am sorry for the late reply but i had very busy week. i have attached pictures of circuit boards with few diagrams from the service manual i found online that i think might help.
            Attached Files

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