I have 6052ci with C7903

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  • toddanderson
    Trusted Tech

    100+ Posts
    • Dec 2005
    • 216
    #1

    I have 6052ci with C7903

    I have 6052ci with C7903
    I have replaced drum units, image feed pwb, drum developer relay pwb, engine pwb
    I also notices that the serial numbers are missing from all the units drum
    DV, transfer belt and fuser looking at the serial number modes
    U117,u984,u122,u165
    Tags: 6052ci, c7903, drum, pwb, units
    • kuby
      Senior Tech

      1,000+ Posts
      • Oct 2007
      • 1309
      #2
      Re: I have 6052ci with C7903

      Is the firmware up to date? v.4.10

        Comment

        • toddanderson
          Trusted Tech

          100+ Posts
          • Dec 2005
          • 216
          #3
          Re: I have 6052ci with C7903

          yes updated firmware multiple times

          Originally posted by kuby
          Is the firmware up to date? v.4.10

            Comment

            • kuby
              Senior Tech

              1,000+ Posts
              • Oct 2007
              • 1309
              #4
              Re: I have 6052ci with C7903

              Did you run the Turbo or the Full? Kyocera says if you are having issues to run the Full version instead of the Turbo.

              Did you contact support and see what they day?

                Comment

                • JR2ALTA
                  Service Manager

                  Site Contributor
                  1,000+ Posts
                  • Feb 2010
                  • 2010
                  #5
                  Re: I have 6052ci with C7903

                  Our similar issue our rep came out and installed a brand new PM kit fixed it. Always unplug machine on these too, for proper serial number resets.

                  I know it sounds unbelievable but I think the idea is a corrupt consumable and just shotgun it.
                  Last edited by JR2ALTA; 09-24-2021, 01:50 AM.

                    Comment

                    • KYO_OEM
                      Senior Tech

                      500+ Posts
                      • Aug 2011
                      • 624
                      #6
                      Re: I have 6052ci with C7903

                      It also can be a broken DV unit....
                      I would disassemble all 4 DKs and DVs and reassembling only step by step
                      Start with BK DK---BK DV----MG DK---MG DV----until you reach yellow units
                      After each step i would check SNs by U117 + U984 until i found the broken one.

                      By the way:
                      You can be happy that it happens on xx53ci instead of xx54ci.
                      If C7903 or any other print unit related C-Call will appear on new series, no way to enter LLU related service points.
                      NO U110, U117, U127, U158, and so on.....
                      I checked the new Partial Operation Function for training and found that the
                      "Partial Operation Function" will prohibit the entrance to these important service points.
                      At the moment i am fighting against KDC because of this behavior.
                      They won`t accept to activate these SPs again...
                      They wrote that these SPs are still available, but they forgot that we must use 1087 1087 instead of the factory code (xxxx****)
                      My 1. training course will start next week and i has to tell the guys that its still under investigation because it won`t work as descriped....

                        Comment

                        • rjohnson843
                          Junior Member
                          • Jul 2013
                          • 7
                          #7
                          Hi did you ever find a solution to this i have one giving me codes c7901-c7904

                            Comment

                            • KYO_OEM
                              Senior Tech

                              500+ Posts
                              • Aug 2011
                              • 624
                              #8
                              sometimes no serial numbers available.
                              No DV, no dk
                              both components are connected to drum developer relay pwb
                              If we do not get power supply from feed image pwb, feed image pwb maybe broken
                              additional check from fk and belt serialnumbers
                              also no number, feed image pwb
                              we have had 1 broken unit which breaks the serial communication
                              In this case to has to disassemble each LLU part and assemble again back to back.
                              Each time you has to check if the number would shown by the service point.
                              e.g. have had broken dv unit yellow, but system showed C7902 /cyan drum missing instead of C7914
                              mostly no serial number visible because of broken drum developer realy pwb or feed image pwb.

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