Ricoh MPC2000/MPC2500 streaks on prints driving me crazy!

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  • keithxxiii
    Just a tech

    250+ Posts
    • Nov 2014
    • 469

    #16
    Re: Ricoh MPC2000/MPC2500 streaks on prints driving me crazy!

    Originally posted by skinnyb
    Seen it more times than I care to count on this model and all the subsequent ones to follow (ie 5000, 4501,4502 etc). Change the itb cleaning unit. It may look fine but it isn't cleaning good and let's excess toner by (usually the brush fails, not the blade). I usually see wierd patterns and it's left overs of the MUSIC sensor hash patterns.

    Sent from my VS987 using Tapatalk
    Plus 1!
    Aye! Cut the crap

    Comment

    • luca72
      Field Supervisor

      1,000+ Posts
      • Oct 2017
      • 1778

      #17
      Re: Ricoh MPC2000/MPC2500 streaks on prints driving me crazy!

      Originally posted by fearworksmedia
      Hi all,

      This is my first post here. I have searched and searched for an answer to my exact issue but everyone seems to experience different streaks to me, so here goes...

      I have two Ricoh machines, an MPC2000 and an MPC2500. I run and service them myself as best I can. I have had entire units apart to rebuild them and learn how they work, so not afraid if that's what I need to do again.

      I am finding that my colour prints (not copies, nothing to do with scanner) will print the first 6 or 7 copies nicely, and then I start to keep annoying streaks appearing on subsequent prints. The streaks are usually near the extreme left and right edges of the paper path. They are sometimes clearly made of one colour, or two colours mixed, other times they look black but upon close inspection they are made of the different colours on top of each other. If I stop printing, wait until the printer has finished its cycling and then start again, I get good prints for the first 6 or 7, and the streaks start to appear again.

      I have cleaned and cleaned everything. The charge rollers are not getting dirty. The PCUs do not have any obvious banding around them which would be causing this. The transfer belts on both machines don't have any major scuffs, scratches or abrasions that I would expect to cause a problem. I just cannot get to the bottom of it. I see different colours forming the streaks at different times, but in the same place. It's not that I get a random streak of cyan in one area, then another streak of magenta, etc. The streaks appear in the same areas and patterns and the different colours will seemingly "adhere" to the same streaky lines once they start to appear.

      I am fed up of it It happens on both my machines, so surely it must be happening to others as well, or at least someone must recognise it. I print quite a bit of high coverage stuff but the PCU blades seem to be doing their job, and there are no nicks or cuts or build-up areas on any of the PCU or or ITB cleaning unit blades. They aren't brand new, but they seem to be in good condition. All lube wax bars are present and none are exhausted. There is not a build-up of waste toner in any of the drum reservoirs.

      All the developers seem to be fine and if it was a developer issue, I don't see how the streaks would appear composed of the different colours and always in the same places.

      The transfer roller seems to pick up the lines of streaks, presumably as they are forming on the ITB and transferring during the gaps between sheets.

      Strangely I don't seem to get the problem at all when I print black and white documents.

      I really hope someone will see my photos and recognise what is happening so that I can replace whatever needs replacing. I don't see anything in the service manual or Goose's Guide or anywhere else that is my exact streak problem... Please help!!

      [ATTACH=CONFIG]41132[/ATTACH][ATTACH=CONFIG]41133[/ATTACH][ATTACH=CONFIG]41134[/ATTACH][ATTACH=CONFIG]41135[/ATTACH][ATTACH=CONFIG]41136[/ATTACH][ATTACH=CONFIG]41137[/ATTACH][ATTACH=CONFIG]41138[/ATTACH]


      seems a problem of contact of some roll inside the itb, maybe broken plastic attack (?), but it could also be more simply the itb cleaning unit that has some decompensation
      "I'll be back"

      Comment

      • charm18
        Junior Member
        • Apr 2017
        • 5

        #18
        Re: Ricoh MPC2000/MPC2500 streaks on prints driving me crazy!

        Originally posted by fearworksmedia
        Hi all,

        This is my first post here. I have searched and searched for an answer to my exact issue but everyone seems to experience different streaks to me, so here goes...

        I have two Ricoh machines, an MPC2000 and an MPC2500. I run and service them myself as best I can. I have had entire units apart to rebuild them and learn how they work, so not afraid if that's what I need to do again.

        I am finding that my colour prints (not copies, nothing to do with scanner) will print the first 6 or 7 copies nicely, and then I start to keep annoying streaks appearing on subsequent prints. The streaks are usually near the extreme left and right edges of the paper path. They are sometimes clearly made of one colour, or two colours mixed, other times they look black but upon close inspection they are made of the different colours on top of each other. If I stop printing, wait until the printer has finished its cycling and then start again, I get good prints for the first 6 or 7, and the streaks start to appear again.

        I have cleaned and cleaned everything. The charge rollers are not getting dirty. The PCUs do not have any obvious banding around them which would be causing this. The transfer belts on both machines don't have any major scuffs, scratches or abrasions that I would expect to cause a problem. I just cannot get to the bottom of it. I see different colours forming the streaks at different times, but in the same place. It's not that I get a random streak of cyan in one area, then another streak of magenta, etc. The streaks appear in the same areas and patterns and the different colours will seemingly "adhere" to the same streaky lines once they start to appear.

        I am fed up of it It happens on both my machines, so surely it must be happening to others as well, or at least someone must recognise it. I print quite a bit of high coverage stuff but the PCU blades seem to be doing their job, and there are no nicks or cuts or build-up areas on any of the PCU or or ITB cleaning unit blades. They aren't brand new, but they seem to be in good condition. All lube wax bars are present and none are exhausted. There is not a build-up of waste toner in any of the drum reservoirs.

        All the developers seem to be fine and if it was a developer issue, I don't see how the streaks would appear composed of the different colours and always in the same places.

        The transfer roller seems to pick up the lines of streaks, presumably as they are forming on the ITB and transferring during the gaps between sheets.

        Strangely I don't seem to get the problem at all when I print black and white documents.

        I really hope someone will see my photos and recognise what is happening so that I can replace whatever needs replacing. I don't see anything in the service manual or Goose's Guide or anywhere else that is my exact streak problem... Please help!!

        [ATTACH=CONFIG]41132[/ATTACH][ATTACH=CONFIG]41133[/ATTACH][ATTACH=CONFIG]41134[/ATTACH][ATTACH=CONFIG]41135[/ATTACH][ATTACH=CONFIG]41136[/ATTACH][ATTACH=CONFIG]41137[/ATTACH][ATTACH=CONFIG]41138[/ATTACH]
        check the transfer belt and the pcu

        Comment

        • MIGUELMARCHENA
          Trusted Tech

          Site Contributor
          100+ Posts
          • Feb 2018
          • 195

          #19
          Re: Ricoh MPC2000/MPC2500 streaks on prints driving me crazy!

          observe the color of the waste jarIs it true that it is the same as the one that appears on the printed pages?the cleaning unit of the transferThere is the problem
          observe the color of the waste jarIs it true that it is the same as the one that appears on the printed pages?the cleaning unit of the transferThere is the problem

          Comment

          • AjitN
            Trusted Tech

            250+ Posts
            • Mar 2009
            • 287

            #20
            Re: Ricoh MPC2000/MPC2500 streaks on prints driving me crazy!

            Originally posted by NeoMatrix
            Charge rollers in the PCUs...
            It may be faulty toner especially black as streaks mostly are appearing from black text OR black PCU as blade is not cleaning properly.

            In case of ITB it should appear in all colors, which I could not see on samples.

            Try stopping A3 prints before fuser ( This will tell you if it is after ITB OR after PCDU only) & then some length in the fuser, if it is from fuser to cross check root cause.
            Hope this helps

            Comment

            • sarm2001

              #21
              Re: Ricoh MPC2000/MPC2500 streaks on prints driving me crazy!

              Hi,

              I would suspect the K PCU is at fault looking at the examples. K toner is not being cleaned properly by the blade due to wear, this transfers to the ITB then onto the PTR as your picture shows. Try cleaning the blade but I think a replacement would be better. The high coverage will also not be helping as this is an old office device meant for low coverage work.

              Cheers.

              Comment

              • Michael Craig
                Technician
                • Dec 2016
                • 12

                #22
                Re: Ricoh MPC2000/MPC2500 streaks on prints driving me crazy!

                If I remember correctly those machines have oil and cleaning rollers in the fuser. They will often run clean on the first few copies and the cause streaks. I would not your diagnoses to the drums. Also check the transfer unit cleaning blade. The assembly is easy to swap out and may resolve many issues.

                Comment

                • fearworksmedia
                  Junior Member
                  • Oct 2017
                  • 7

                  #23

                  Comment

                  • davel
                    Technician

                    1,000+ Posts
                    • Oct 2011
                    • 1104

                    #24
                    Re: Ricoh MPC2000/MPC2500 streaks on prints driving me crazy!

                    If not serviced correctly you can expect inferior performance.

                    Comment

                    • AjitN
                      Trusted Tech

                      250+ Posts
                      • Mar 2009
                      • 287

                      #25
                      Re: Ricoh MPC2000/MPC2500 streaks on prints driving me crazy!

                      [QUOTE=fearworksmedia;714256]

                      I also have a question about something that intrigues me. Can anyone comment whether the wax lubricant bars in the PCUs or in the ITB cleaning unit can cause this issue?

                      Wax should not be a constraint in this case as Toner it self contains adequate amount of wax which serves as lubricant to drum+blade & Transfer belt + transfer cleaning blade, as well as semi gloss for image on paper after fusing.

                      Regards

                      Comment

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