HP LJ Pro400 MFP M425dn

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  • zoraldinho
    teacher-guide-expert-guru

    Site Contributor
    2,500+ Posts
    • Mar 2008
    • 4999
    #1

    HP LJ Pro400 MFP M425dn

    Hi guys

    Little help with this toy.Mfp have over 45K.Problem is with duplex jam.Every tenth shit jam in duplex.Machine have new duplex unit,new pick up and separator.I check sensor flags,springs and solenoids and i try with different tipes of paper.Am I missing something?
    If it ain't broke, don't fix it
    A picture is worth a thousand words
    Tags: None
    • zoraldinho
      teacher-guide-expert-guru

      Site Contributor
      2,500+ Posts
      • Mar 2008
      • 4999
      #2
      Re: HP LJ Pro400 MFP M425dn

      Btw. I forgot to mention that the printer jams only with duplex printing and code is 13.0000

      Regards
      If it ain't broke, don't fix it
      A picture is worth a thousand words

        Comment

        • Wild Bill
          Senior Tech

          500+ Posts
          • Jul 2005
          • 774
          #3
          Re: HP LJ Pro400 MFP M425dn

          These machines are Jamamatics. The diagnostic codes suck also. 13.0000 is also jam at the tray so its hard to tell what's actually jamming. Is it still on warranty?
          I always check that. HP will give you a replacement machine. I would then change the Fuser Assembly. Good Luck
          Izzy

            Comment

            • tartzu
              Technician
              • Oct 2014
              • 13
              #4
              Re: HP LJ Pro400 MFP M425dn

              I have same problem with the same device. Only jams with 2-sided printing and help to be found. And unfortunately no warranty left also.

                Comment

                • Elmtech
                  Trusted Tech

                  100+ Posts
                  • Nov 2013
                  • 155
                  #5
                  Re: HP LJ Pro400 MFP M425dn

                  Have you checked the little blue lever at the back of the machine. Looking at the back it is in the bottom left corner behind the lower cover. It movies the duplex tray guides depending on which size paper is loaded.
                  Where exactly is the paper stopping and is it crumpled up as in something is blocking the paperpath or just stopped like a sensor is not registering. Also worth pulling out the sensor assy from underneath the machine and checking the sensor flags are ok. The pickup assy is also part of the duplex paperpath and in this thing isn't even an orderable part on this as far as i know and is a big job to remove. HP don't even give the procedure in the manual. Looks like you may have to split the frame to remove it.

                    Comment

                    • tartzu
                      Technician
                      • Oct 2014
                      • 13
                      #6
                      Re: HP LJ Pro400 MFP M425dn

                      Yes, have checked the sensor flags. The blue lever at the back is set correct also. Paper is just stopping in duplex. First edge just a little up into pickup path/way. And after this occurs its sometimes hard to get device back in order cause even after clearing path, checking all doors and even moveing over sensor flags, the jam wont clear. After doing few times liek this it randomly clears. This device started to have this problem with counter on 15k. After that its been used only has 1 sided printer in other workgroup but 2-sided is need still sometimes.

                        Comment

                        • Elmtech
                          Trusted Tech

                          100+ Posts
                          • Nov 2013
                          • 155
                          #7
                          Re: HP LJ Pro400 MFP M425dn

                          Sounds like perhaps a faulty sensor or engine board.

                            Comment

                            • zoraldinho
                              teacher-guide-expert-guru

                              Site Contributor
                              2,500+ Posts
                              • Mar 2008
                              • 4999
                              #8
                              Re: HP LJ Pro400 MFP M425dn

                              Board definitely.Thanks for help guys.
                              If it ain't broke, don't fix it
                              A picture is worth a thousand words

                                Comment

                                • Elmtech
                                  Trusted Tech

                                  100+ Posts
                                  • Nov 2013
                                  • 155
                                  #9
                                  Re: HP LJ Pro400 MFP M425dn

                                  I now have a machine same model with phantom jams. Full clean reseat all connectors clean sensors replace t2 pick roll and Sep Pad. No change. Latest firmware loaded aswell. Factory reset and check all pc and printer settings. Customer is getting equivalent to 13.20 jams but of course this machine logs all jams as 13.0000. Was wondering what solved the jam issues for the previous posters. Cheers

                                    Comment

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