Background on prints

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  • nathicana
    Trusted Tech

    Site Contributor
    250+ Posts
    • Aug 2008
    • 329

    #1

    Background on prints

    This problem happens only in the morning. Background on prints.

    So far the drum and developing unit have been replaced.

    335k on machine
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  • blackcat4866
    Master Of The Obvious

    Site Contributor
    10,000+ Posts
    • Jul 2007
    • 22973

    #2
    Re: Background on prints

    Were I to guess I'd say that you're in a high humidity environment, and your machine needs a drum refresh more frequently.

    What model do you suppose this might be?

    If it were an Alphard I'd say enable U325 to On/Mode2, U148 to Mode3.
    =^..^=
    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

    • nathicana
      Trusted Tech

      Site Contributor
      250+ Posts
      • Aug 2008
      • 329

      #3
      Re: Background on prints

      Model is a 5002, sorry for the lack of information

      Comment

      • blackcat4866
        Master Of The Obvious

        Site Contributor
        10,000+ Posts
        • Jul 2007
        • 22973

        #4
        Re: Background on prints

        That should work. =^..^=
        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

        • Santander
          Senior Tech

          Site Contributor
          500+ Posts
          • May 2009
          • 768

          #5
          Re: Background on prints

          Originally posted by nathicana
          This problem happens only in the morning. Background on prints.

          So far the drum and developing unit have been replaced.

          335k on machine
          Since you did not indicate the model this is occurring on giving a definitive answer is hard. Since it only happens in the morning, it would seem to be a moisture problem as Blackcat said. Are the paper tray heaters turned on if available on that model? A little more info on the model would be helpful.

          Comment

          • JR2ALTA
            Service Manager

            Site Contributor
            1,000+ Posts
            • Feb 2010
            • 2029

            #6
            Re: Background on prints

            has the machine registered that you replaced the drum and dev? check U000 for the serial numbers. Machines now need to be unplugged, installing new parts can create a process control nightmare.

            Comment

            • Ropariva
              Senior Tech

              500+ Posts
              • Mar 2016
              • 639

              #7
              Re: Background on prints

              Originally posted by nathicana
              This problem happens only in the morning. Background on prints.

              So far the drum and developing unit have been replaced.

              335k on machine

              Comment

              • copykat93
                Trusted Tech

                Site Contributor
                250+ Posts
                • Oct 2021
                • 269

                #8
                Re: Background on prints

                Not familiar with that model... But I am curious where the machines is located? Does it set in front of or by a window that may be getting full sunlight in the morning? I have seen some weird things when sun is involved, black pages, blank pages, jamming, background & even moisture on guide plates causing streaks that look like bleeding and running on the page.. Just a thought

                Comment

                • nathicana
                  Trusted Tech

                  Site Contributor
                  250+ Posts
                  • Aug 2008
                  • 329

                  #9
                  Re: Background on prints

                  Loosening the belt on the scanner motor seemed to make this problem go away. This suggests that the background was present only during copying and scanning, not printing from the computer or receiving faxes.

                  Comment

                  • blackcat4866
                    Master Of The Obvious

                    Site Contributor
                    10,000+ Posts
                    • Jul 2007
                    • 22973

                    #10
                    Re: Background on prints

                    I'm curious how you came to this conclusion. I don't see the connection. =^..^=
                    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

                    • PrintWhisperer
                      Trusted Tech

                      250+ Posts
                      • Feb 2018
                      • 454

                      #11
                      Re: Background on prints

                      Originally posted by blackcat4866
                      I'm curious how you came to this conclusion. I don't see the connection. =^..^=
                      Because the pattern matched what this problem does on a color machine.

                      First test is platen vs DP (no defect on platen as optical skew only happens at slit position.

                      Second test, with platen removed and power off, push scanner to left limit.
                      If it bounces back slightly when released, belt is too tight.
                      Loosens as machine warms up, hence morning issue.
                      "Being ignorant is not so much a shame, as being unwilling to learn" - Benjamin Franklin

                      Comment

                      • blackcat4866
                        Master Of The Obvious

                        Site Contributor
                        10,000+ Posts
                        • Jul 2007
                        • 22973

                        #12
                        Re: Background on prints

                        Originally posted by PrintWhisperer
                        Because the pattern matched what this problem does on a color machine.

                        First test is platen vs DP (no defect on platen as optical skew only happens at slit position.

                        Second test, with platen removed and power off, push scanner to left limit.
                        If it bounces back slightly when released, belt is too tight.
                        Loosens as machine warms up, hence morning issue.
                        Good to know, Thanks! =^..^=
                        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

                        • copykat93
                          Trusted Tech

                          Site Contributor
                          250+ Posts
                          • Oct 2021
                          • 269

                          #13
                          Re: Background on prints

                          WOW... Thats a new one for me as well.... Did anyone mention scanner position for DP, shading adjustment might make the difference. I am glad you fixed the issue, I just never would have thought that would make a difference, but the shading adjustment for the DP is a real fix as well.

                          Thanks for the update

                          Comment

                          • PrintWhisperer
                            Trusted Tech

                            250+ Posts
                            • Feb 2018
                            • 454

                            #14
                            Re: Background on prints

                            Originally posted by copykat93
                            WOW... Thats a new one for me as well.... Did anyone mention scanner position for DP, shading adjustment might make the difference. I am glad you fixed the issue, I just never would have thought that would make a difference, but the shading adjustment for the DP is a real fix as well.

                            Thanks for the update
                            Not really. If you see the defect in color, it makes more sense.

                            The 1st mirror assembly is out of position so it refracts white light as seen by the CCD. On a color machine the aberration is peach colored. A color scan via DP will bear this out. Most all scanners scan in color.
                            For BW the defect is converted to a greyscale of the color refraction.

                            A dual scan feeder would have good CIS backside scan as well on 2-2.

                            Plus remember White reference adjustments affect all and only DP front side is affected.
                            "Being ignorant is not so much a shame, as being unwilling to learn" - Benjamin Franklin

                            Comment

                            • KYO_OEM
                              Senior Tech

                              500+ Posts
                              • Aug 2011
                              • 704

                              #15
                              Re: Background on prints

                              scanner driving belt can be a good idea, i have had several cases in past, but........

                              From example the print margins are not visible because there are scan margins
                              If we have moisture problem, background will be visible on print margins
                              If we have scanner belt problem, we will get no background on printout margins.

                              Comment

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