Dead C558 but power supply is good

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  • SAR
    Trusted Tech

    100+ Posts
    • Jul 2009
    • 203
    #1

    Dead C558 but power supply is good

    Have a C558 that is dead, no lights or fans running. Was thinking power supply, so took one with me and swapped it out, but that didn't fix it.
    Based on voltage readings from the power supply, KM is saying it's a bad MFP board.
    Just wanted to see if anyone here has had this same issue and if it could possibly be anything else, before I order an expensive MFP board.
    Tags: None
    • SAR
      Trusted Tech

      100+ Posts
      • Jul 2009
      • 203
      #2
      Replacing the MFP board fixed it. Luckily we had a parts machine and were able to use the reset tool on the MFP board and swap it over to our problem machine.
      If anyone else runs into this issue, KM had us check for 5V present on CN006 pin6 on the power supply. If 5V is present, replace mfp board.
      Last edited by SAR; 09-13-2024, 02:42 PM.
        👍 6

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        • adecanmin
          Trusted Tech

          Site Contributor
          250+ Posts
          • Oct 2010
          • 316
          #3
          Originally posted by SAR
          Replacing the MFP board fixed it. Luckily we had a parts machine and were able to use the reset tool on the MFP board and swap it over to our problem machine.
          If anyone else runs into this issue, KM had us check for 5V present on CN006 pin6. If 5V is present, replace mfp board.
          Did you use the tar file to reset the board? I need to get that software when I'm able. I have the reset file for the 4 series but not the 8.

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            • copyman
              Owner / Technician

              Site Contributor
              2,500+ Posts
              • Sep 2005
              • 4712
              #4
              Originally posted by SAR
              Replacing the MFP board fixed it. Luckily we had a parts machine and were able to use the reset tool on the MFP board and swap it over to our problem machine.
              If anyone else runs into this issue, KM had us check for 5V present on CN006 pin6. If 5V is present, replace mfp board.
              Thanks for the tip. Funny the only dead machine I've had in a long time was also a C558 and it was the power supply that was bad. But before ordering a board from Hytec I had checked pwr sup and had voltage going in and no 5v & 24v going out.

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                • Synthohol
                  Certified Konica Expert

                  Site Contributor
                  5,000+ Posts
                  • Mar 2016
                  • 5841
                  #5
                  Originally posted by adecanmin

                  Did you use the tar file to reset the board? I need to get that software when I'm able. I have the reset file for the 4 series but not the 8.
                  ck PMs
                  We know a thing or two because we've seen a thing or two.
                  The medication helps though...

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                    • SAR
                      Trusted Tech

                      100+ Posts
                      • Jul 2009
                      • 203
                      #6
                      Just for future reference, that reset tar file for the 8 series is a789be.tar.

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