1250p printing pages bot half and completely dark.

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  • nullskull
    Learning

    250+ Posts
    • Aug 2023
    • 396
    #1

    1250p printing pages bot half and completely dark.

    Hey so this 1250p I was using all the sudden started to print with half the page just as seen in the first picture. After going into admin mode I ran a couple developer and auto density adjust things. (Don't remember the exact ones but will check if it's important. Probably dumb but it did work before for certain similar situation.) The machine was serviced/cleaned recently so I don't know if it has something to do with that. test prints within the admin mode did not seem to show anything but on rebooting the machine the prints are normal again. Anyone know what happened?



    88e168b1-6d19-41c1-b759-5eb12977bf83.jpg
    30d00c16-4a02-48be-a40d-21eb2af5c2de.jpg
    Tags: 1250p, admin, density, imaging unit, new user
    • wjurls
      Trusted Tech

      Site Contributor
      250+ Posts
      • Feb 2017
      • 494
      #2
      Re: 1250p printing pages bot half and completely dark.

      Looks like you may have killed the LPH while cleaning it. It should only be dry wiped with a clean microfiber rag.

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 22997
          #3
          Re: 1250p printing pages bot half and completely dark.

          I think I have an image of what a failing LED printhead looks like. You get images repeating front to back on your LEF prints, which would be mechanically impossible to do. The LED printhead overheats. Often by the time you arrive for your service call the printhead has cooled down, and works fine upon arrival:

          LED test sample1.JPGLED test sample2.JPG =^..^=
          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

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22997
              #4
              Re: 1250p printing pages bot half and completely dark.

              I've always used a blower brush or towel with alcohol to clean the LED printhead. I believe that the vacuum could permanently damage it. =^..^=
              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

                • wjurls
                  Trusted Tech

                  Site Contributor
                  250+ Posts
                  • Feb 2017
                  • 494
                  #5
                  Re: 1250p printing pages bot half and completely dark.

                  Originally posted by blackcat4866
                  I've always used a blower brush or towel with alcohol to clean the LED printhead. I believe that the vacuum could permanently damage it. =^..^=
                  Vacuum for sure would be kiss of death. I also killed one using a moist Q-tip. Had results similar to what OP posted.

                    Comment

                    • nullskull
                      Learning

                      250+ Posts
                      • Aug 2023
                      • 396
                      #6
                      Re: 1250p printing pages bot half and completely dark.

                      Originally posted by wjurls
                      Vacuum for sure would be kiss of death. I also killed one using a moist Q-tip. Had results similar to what OP posted.
                      Ok since it is working fine now would you say to be safe I should order a replacement? And if so do you know the part number or name of the part? thanks

                        Comment

                        • wjurls
                          Trusted Tech

                          Site Contributor
                          250+ Posts
                          • Feb 2017
                          • 494
                          #7
                          Re: 1250p printing pages bot half and completely dark.

                          Originally posted by nullskull
                          Ok since it is working fine now would you say to be safe I should order a replacement?
                          Not yet, they are stupid expensive. You may have dodged a bullet. If you do end up needing one, let me know. I have some used ones.

                          A4EUR75300 LPH Assembly
                          Last edited by wjurls; 12-19-2023, 10:08 PM. Reason: missing infomation

                            Comment

                            • nullskull
                              Learning

                              250+ Posts
                              • Aug 2023
                              • 396
                              #8
                              Re: 1250p printing pages bot half and completely dark.

                              Originally posted by wjurls
                              Not yet, they are stupid expensive. You may have dodged a bullet. If you do end up needing one, let me know. I have some used ones.

                              A4EUR75300 LPH Assembly
                              woah you're right. 1000 just for that

                                Comment

                                • blackcat4866
                                  Master Of The Obvious

                                  Site Contributor
                                  10,000+ Posts
                                  • Jul 2007
                                  • 22997
                                  #9
                                  Re: 1250p printing pages bot half and completely dark.

                                  I'm as optimistic as the next guy ... but chances are, you'll be ordering it. The symptoms will happen more often and more often, until you cannot pretend anymore. =^..^=
                                  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

                                    • nullskull
                                      Learning

                                      250+ Posts
                                      • Aug 2023
                                      • 396
                                      #10
                                      Re: 1250p printing pages bot half and completely dark.

                                      Originally posted by blackcat4866
                                      I'm as optimistic as the next guy ... but chances are, you'll be ordering it. The symptoms will happen more often and more often, until you cannot pretend anymore. =^..^=
                                      what causes the part to break anyway? just overuse or something else?

                                        Comment

                                        • blackcat4866
                                          Master Of The Obvious

                                          Site Contributor
                                          10,000+ Posts
                                          • Jul 2007
                                          • 22997
                                          #11
                                          Re: 1250p printing pages bot half and completely dark.

                                          I believe the electronics in the printhead overheat. If allowed to cool it often resets, and works for another while. =^..^=
                                          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

                                            • zayonc
                                              Technician
                                              • Jan 2022
                                              • 48
                                              #12
                                              Re: 1250p printing pages bot half and completely dark.

                                              Need to reconnect both ends of the LPC cable. Usually helps
                                                👍 1

                                                Comment

                                                • techsxge
                                                  Senior Tech

                                                  Site Contributor
                                                  500+ Posts
                                                  • Jan 2022
                                                  • 660
                                                  #13
                                                  Re: 1250p printing pages bot half and completely dark.

                                                  Originally posted by blackcat4866
                                                  I think I have an image of what a failing LED printhead looks like. You get images repeating front to back on your LEF prints, which would be mechanically impossible to do. The LED printhead overheats. Often by the time you arrive for your service call the printhead has cooled down, and works fine upon arrival:

                                                  [ATTACH=CONFIG]60912[/ATTACH][ATTACH=CONFIG]60911[/ATTACH] =^..^=
                                                  i have to say that menu looks good

                                                    Comment

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