Firmware file for Marantz NR1501 needed

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  • Daniel Larsson
    Member
    • Feb 2025
    • 11
    • Sweden

    #1

    Firmware file for Marantz NR1501 needed

    Hi all,

    I picked up a Marantz NR1501 that the seller said did not produce any audio, but was starting up just like normal. This was indeed the case and the hunt for damaged components started.
    After confirming all voltages and replacing all caps on this godforsaken HDMI-board I finally got sound from the AUX input, but all digital inputs are still dead.

    The service menu shows no DSP version so I desoldered IC1604 that should have the serial flash DSP firmware on it and made two dumps that turned out identical.
    The content of these seems to be useless as far as I can tell and I would like to flash the chip with a proper firmware to see if that fixes the issue, or at least compare what I have to a proper one from a unit that works.

    Hoping someone has a firmware file and can share it as I am out of options here and this seems to be the issue 😊

    (attaching my two reads if that is of interest for anyone)

    Regards,
    Daniel
    Attached Files
    Last edited by Daniel Larsson; 05-23-2025, 04:23 AM.
  • Answer selected by Daniel Larsson at 05-24-2025, 05:28 AM.
    dobrykamil
    Senior Member
    • Jun 2013
    • 62
    • UK

    Also, replace C1604 if you haven't done it yet.
    Attached Files

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    • dobrykamil
      Senior Member
      • Jun 2013
      • 62
      • UK

      #2
      Also, replace C1604 if you haven't done it yet.
      Attached Files

      Comment

      • Daniel Larsson
        Member
        • Feb 2025
        • 11
        • Sweden

        #3
        Originally posted by dobrykamil
        Also, replace C1604 if you haven't done it yet.
        Thank you soooo much, you are a life saver!
        Will flash the IC first thing tomorrow and report back.

        C1604 including all other 30 something electrolytic capacitors are replaced.

        Comment

        • Daniel Larsson
          Member
          • Feb 2025
          • 11
          • Sweden

          #4
          Flashed the new firmware to IC1604, resoldered it and it works perfect!

          Service menu finally shows DSP version and HDMI audio from PS5 works flawless.

          Again, a huge thanks for providing the firmware.

          Comment

          • dobrykamil
            Senior Member
            • Jun 2013
            • 62
            • UK

            #5
            Originally posted by Daniel Larsson
            Flashed the new firmware to IC1604, resoldered it and it works perfect!

            Service menu finally shows DSP version and HDMI audio from PS5 works flawless.

            Again, a huge thanks for providing the firmware.
            Happy days! I'm glad I could help.

            Comment

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