Onkyo TX-NR626 & TX-NR636 Resistor Question

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  • dolivas27
    Senior Member
    • Mar 2014
    • 66
    • United States
    #1

    Onkyo TX-NR626 & TX-NR636 Resistor Question

    I have a question on replacement resistor in Onkyo receivers.

    The Service Manual call for this
    R6073 NON-FLAMMABLE CARBON FILM RESISTOR R25J-120

    I am having a hard time finding a flameproof carbon film resistor I need several values can I use a metal film in place of the carbon film.

    If not any suggestion on a source for the flameproof carbon film?

    Thanks for the help.
    Tags: None
    • redwire
      Badcaps Legend
      • Dec 2010
      • 3906
      • Canada
      #2
      Re: Onkyo TX-NR626 & TX-NR636 Resistor Question

      What part of the circuit uses the resistor? The only thing special about carbon film is it can take massive overloads for short periods. Oh, and they make a lot of smoke and fire when they burn...
      I've never seen flameproof carbon resistors, it's probably a typo in the manual. I see that a lot- fusible, flame-proof, metal film, carbon film mixed up in translation.
      I would use a flameproof metal-film, or fusible if it's safety related.

        Comment

        • dolivas27
          Senior Member
          • Mar 2014
          • 66
          • United States
          #3
          Re: Onkyo TX-NR626 & TX-NR636 Resistor Question

          These are in the pre-amplifier & amp section.

          The do look like they could be carbon film.

          I will be selling the unit once repaired and I want them to be right.

          I have the service manual if you would like to look at it.

          Thanks

            Comment

            • redwire
              Badcaps Legend
              • Dec 2010
              • 3906
              • Canada
              #4
              Re: Onkyo TX-NR626 & TX-NR636 Resistor Question

              I believe metal film are better in almost every spec except for surge power handling. Some audiophiles prefer their (carbon) vintage sound.
              Metal film resistors have better:
              Lower Noise
              Long term stability
              Temp coefficient
              Resistance tolerance

              PM me the service manual and I will check why these are spec'd.

                Comment

                • dolivas27
                  Senior Member
                  • Mar 2014
                  • 66
                  • United States
                  #5
                  Re: Onkyo TX-NR626 & TX-NR636 Resistor Question

                  Originally posted by redwire
                  I believe metal film are better in almost every spec except for surge power handling. Some audiophiles prefer their (carbon) vintage sound.
                  Metal film resistors have better:
                  Lower Noise
                  Long term stability
                  Temp coefficient
                  Resistance tolerance

                  PM me the service manual and I will check why these are spec'd.
                  PM sent Thanks

                    Comment

                    • commpradeep
                      New Member
                      • Aug 2015
                      • 3
                      • USA
                      #6
                      Re: Onkyo TX-NR626 & TX-NR636 Resistor Question

                      Originally posted by dolivas27
                      I have a question on replacement resistor in Onkyo receivers.

                      The Service Manual call for this
                      R6073 NON-FLAMMABLE CARBON FILM RESISTOR R25J-120

                      I am having a hard time finding a flameproof carbon film resistor I need several values can I use a metal film in place of the carbon film.

                      If not any suggestion on a source for the flameproof carbon film?

                      Thanks for the help.
                      Can you please share service manual if it's available. I'm trying to fix my receiver myself but could not find the manual

                        Comment

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