Bizhub pro 951 error code C-3905

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  • M3HR4N
    Technician
    • Jun 2015
    • 34

    Bizhub pro 951 error code C-3905

  • tulintron
    Senior Tech

    Site Contributor
    500+ Posts
    • Jul 2014
    • 649

    #2
    Re: Bizhub pro 951 error code C-3905

    Hardware issues. Professionals can solve, Hytek Repair
    https://www.copytechnet.com/images/smilies/cool.pngNada como dia após diahttps://www.copytechnet.com/images/smilies/cool.png

    Comment

    • copy_kid
      Technician
      • Jan 2011
      • 13

      #3
      Re: Bizhub pro 951 error code C-3905

      We are having the same issue on a Pro 951... In the service manual it points to TH2, not TH1 as you have written... But so far we have replaced the TH2, machine heats up and right when "ready to print" is displayed, it shows C-3905 again! I have taken the fusing unit and mounted it on another machine and it works perfect. When put on the original machine it gives the code again...

      Cecked ICP 4 on PRCB, it is good
      Checked all ICP's on PRCB and they work good

      Checked the connector btw fusing unit and machine... it is good.

      Found an article on infohub regarding this issue (find it attached), changed the sleeved (even though the solution would have been absurd to work).

      Uploaded new firmware v52 on the whole machine! Still no luck!

      It is getting frustrating!

      The problem is clearly related to the TH2 thermistor, but the fusing unit works perfect on another machine.

      Next, I will mount a different fusing unit on the original machine and let you guys know if I have any luck. If not, next thing I will do is mount a different PRCB...

      I still think the problem is the PRCB... Like it says in the troubleshooting guide attached ("damaging the resistor on the PRCB") one resistor might be broken... The ICP's are all good!
      Attached Files

      Comment

      • blackcat4866
        Master Of The Obvious

        Site Contributor
        10,000+ Posts
        • Jul 2007
        • 22599

        #4
        Re: Bizhub pro 951 error code C-3905

        Have you tried clearing the fuser error by resetting DIPSW 3-1 from 1 > 0?
        =^..^=
        If you'd like a serious answer to your request:
        1) demonstrate that you've read the manual
        2) demonstrate that you made some attempt to fix it.
        3) if you're going to ask about jams include the jam code.
        4) if you're going to ask about an error code include the error code.
        5) You are the person onsite. Only you can make observations.

        blackcat: Master Of The Obvious =^..^=

        Comment

        • M3HR4N
          Technician
          • Jun 2015
          • 34

          #5
          Re: Bizhub pro 951 error code C-3905

          Guys the problem solved I already mention it there is no way you should change the PRCB.

          Comment

          • copy_kid
            Technician
            • Jan 2011
            • 13

            #6
            Re: Bizhub pro 951 error code C-3905

            Originally posted by M3HR4N
            Guys the problem solved I already mention it there is no way you should change the PRCB.
            Problem solved? How? What was the solution then?

            Comment

            • copy_kid
              Technician
              • Jan 2011
              • 13

              #7
              Re: Bizhub pro 951 error code C-3905

              Originally posted by blackcat4866
              Have you tried clearing the fuser error by resetting DIPSW 3-1 from 1 > 0?
              =^..^=
              C'mon dude! Realy?

              Comment

              • blackcat4866
                Master Of The Obvious

                Site Contributor
                10,000+ Posts
                • Jul 2007
                • 22599

                #8
                Re: Bizhub pro 951 error code C-3905

                Originally posted by copy_kid
                C'mon dude! Realy?
                I really hope you can communicate a little better than this. =^..^=
                If you'd like a serious answer to your request:
                1) demonstrate that you've read the manual
                2) demonstrate that you made some attempt to fix it.
                3) if you're going to ask about jams include the jam code.
                4) if you're going to ask about an error code include the error code.
                5) You are the person onsite. Only you can make observations.

                blackcat: Master Of The Obvious =^..^=

                Comment

                • Toxic
                  Senior Tech

                  500+ Posts
                  • Dec 2009
                  • 689

                  #9
                  Re: Bizhub pro 951 error code C-3905

                  Come on guys, calm down, ne need for stressing because of little misunderstanding.

                  Let me clarify this if i also understood good
                  Solution was replacing PRCB.
                  copy_kid get little bit angry because blackcat ask him is he done basic procedure for resetting error and he got offended by that because he have some knowledge beyond that level.

                  Correct me if i am wrong.

                  Comment

                  • tsbservice
                    Field tech

                    Site Contributor
                    5,000+ Posts
                    • May 2007
                    • 7459

                    #10
                    Re: Bizhub pro 951 error code C-3905

                    Originally posted by Toxic
                    Come on guys, calm down, ne need for stressing because of little misunderstanding.

                    Let me clarify this if i also understood good
                    Solution was replacing PRCB.
                    copy_kid get little bit angry because blackcat ask him is he done basic procedure for resetting error and he got offended by that because he have some knowledge beyond that level.

                    Correct me if i am wrong.
                    Not at all At least for me.
                    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
                    Blessed are they who can laugh at themselves, for they shall never cease to be amused.

                    Comment

                    • wjurls
                      Trusted Tech

                      Site Contributor
                      250+ Posts
                      • Feb 2017
                      • 426

                      #11
                      Re: Bizhub pro 951 error code C-3905

                      We've had a number of 951's throw a hard C-3905 (like 15+ of them). No idea what actually causes a machine to throw that code. Seeing how it always happens at a school site though, we suspect it may be due to fast cycling of the main power switch. Teachers aren't known for patience with the equipment. Hytec always has boards on hand and/or can repair yours.

                      Comment

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