hp 4250 skews from both trays

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  • dhg
    Technician
    • May 2011
    • 26

    hp 4250 skews from both trays

    skewing from both trays 2 and 3. i have eliminated toner cartridge, actual trays, paper types, cleaned vertical guides reg rollers and checked for build up or foreign objects. 450k ideas ?
  • blackcat4866
    Master Of The Obvious

    Site Contributor
    10,000+ Posts
    • Jul 2007
    • 22666

    #2
    Re: hp 4250 skews from both trays

    Is it skewing before or after imaging? That is to say, Is the image skewed on the paper, or is the image straight on the paper? =^..^=
    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

    • dhg
      Technician
      • May 2011
      • 26

      #3
      Re: hp 4250 skews from both trays

      Originally posted by blackcat4866
      Is it skewing before or after imaging? That is to say, Is the image skewed on the paper, or is the image straight on the paper? =^..^=
      It is on printed image, so seems like registration area or prior, vertical

      Comment

      • benalvarez
        Technician
        • Feb 2015
        • 27

        #4
        Re: hp 4250 skews from both trays

        does it skew when it is printed from the pc, copied from the platen glass, copied from the adf all the same way, or have you not explored those variations? Does that model have a usb plug? Maybe try to import an image from the usb stick and see if it skews that way too. It's real hard to understand every problem without being in front of the mfp. It could be something as simple as a sticker stuck in the paper path that you can't see.

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 22666

          #5
          Re: hp 4250 skews from both trays

          Originally posted by dhg
          It is on printed image, so seems like registration area or prior, vertical
          Originally posted by benalvarez
          does it skew when it is printed from the pc, copied from the platen glass, copied from the adf all the same way, or have you not explored those variations? Does that model have a usb plug? Maybe try to import an image from the usb stick and see if it skews that way too. It's real hard to understand every problem without being in front of the mfp. It could be something as simple as a sticker stuck in the paper path that you can't see.
          Well since an HP laserjet 4250 is just a printer, it could only affect printed images. And since it does not have a scanner or document feeder, it does not affect those operations. =^..^=
          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

          • theengel
            Service Manager

            1,000+ Posts
            • Nov 2011
            • 1784

            #6
            Re: hp 4250 skews from both trays

            I would try replacing the reg assembly. But also check to see that all those plates and springs around the reg assembly are as they should. Every now and then I've had customers try to take them apart to find a jam and not get them back together properly.

            Comment

            • benalvarez
              Technician
              • Feb 2015
              • 27

              #7
              Re: hp 4250 skews from both trays

              Okay does it skew from internal prints like a configuration page, or site map, or only prints from a pc? Are the fences in the tray static or do they move around, is there slop in the trays?

              Comment

              • dhg
                Technician
                • May 2011
                • 26

                #8
                Re: hp 4250 skews from both trays

                Originally posted by benalvarez
                Okay does it skew from internal prints like a configuration page, or site map, or only prints from a pc? Are the fences in the tray static or do they move around, is there slop in the trays?
                it does it from any type of print,not every time but every 2 to 4 copies, the trays guides are tight...

                Comment

                • blackcat4866
                  Master Of The Obvious

                  Site Contributor
                  10,000+ Posts
                  • Jul 2007
                  • 22666

                  #9
                  Re: hp 4250 skews from both trays

                  The worst skew that I've seen was caused by labels wrapping onto the registration roller at one end of the roller. The labels acted like a spacer, so the reg roller didn't have any pressure at one end.

                  My recommendation is to take apart the reg assembly and clean all the rollers. Also check that the pressure springs are all there. =^..^=
                  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

                  • Wild Bill
                    Senior Tech

                    500+ Posts
                    • Jul 2005
                    • 774

                    #10
                    Re: hp 4250 skews from both trays

                    Its not an MFP...

                    I Agree with Black Cat and theengel

                    Inspect registration rollers... you can take all the screws out and at least clean the rollers or remove stuff that's in there, but there's a grounding screw and you cant get to it until you remove main drive assembly.


                    ***Also, I would check the little piece of foam that quiets the registration flapper; Just Like the solenoids the foam gets F'D up and creates glue so the flapper will get stuck up and wont align paper. See Pic...




                    Next, change the Registration assembly which is kind of a big job, Good Luck
                    Attached Files
                    Izzy

                    Comment

                    • dhg
                      Technician
                      • May 2011
                      • 26

                      #11
                      Re: hp 4250 skews from both trays

                      It's fixed , pre registration roller assy ....
                      thank you all for help !!!

                      Comment

                      • blackcat4866
                        Master Of The Obvious

                        Site Contributor
                        10,000+ Posts
                        • Jul 2007
                        • 22666

                        #12
                        Re: hp 4250 skews from both trays

                        Congratulations on your success. Was there an obvious cause? =^..^=
                        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

                        • dhg
                          Technician
                          • May 2011
                          • 26

                          #13
                          Re: hp 4250 skews from both trays

                          Originally posted by blackcat4866
                          Congratulations on your success. Was there an obvious cause? =^..^=
                          Yes i over looked the worn side of the pre reg roller on one side, lighting or angle was bad... Excuses excuses !!
                          It was damn obvious after i removed, i'm a dumb fuu...
                          i' m more of a copier guy.... I had double vision, i see dead people...the excuses never end
                          thanks again ! !
                          dave

                          Comment

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