Sharp AR-M450n with Un-even Copy Quality

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  • CopyFreak
    Technician
    • Jul 2013
    • 27
    #1

    [CQ] Sharp AR-M450n with Un-even Copy Quality

    Sharp AR-M450 with poor copy quality on image corresponding to "rear" side of machine. Paper running in LETTER direction.

    The best way I can describe the problem portion of the image is it has the "appearance" of a humidity issue in paper or a broken rear fuser bushing or dislodged rear tension spring on the fuser. However, the fuser checks out fine. ( toner is bonding ok, nip width is correct, etc )

    Installed brand new oem process unit along with new oem drum & DV, checked DV roller and do not see anything that stands out. It has an even coating of DV/Toner on mag roller, machine is level. ...NO CHANGE IN CQ after install

    I'm starting to think it may be a Transfer roller issue, but was wondering what you folks might think? We only recently started servicing this client and have very little exposure to this particular model. I also tried flexing the side door because I'd read there were similar symptoms.

    I have attached these pic for your review., THANKS IN ADVANCE

    Testcopy1.JPGTestcopy2.JPG
    Tags: ar-m450n, brand, brand new, fuser, image, paper, sharp, toner, transfer, unit
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22996
      #2
      Re: Sharp AR-M450n with Un-even Copy Quality

      Examine the transfer roller gear, and the gear on the drum. When those gears become excessively worn, the rollers separate, causing poor transfer at the rear. It may also pull developer giving you developer copies toward the rear.

      If your customer is using 20# paper or lighter, as a temporary fix you can remove the gear on the transfer roller. It will idle all right on lighter paper. If you enduser attempts to use heavier paper you'll get jamming and stretched images. =^..^=
      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

        • CopyFreak
          Technician
          • Jul 2013
          • 27
          #3
          Re: Sharp AR-M450n with Un-even Copy Quality

          Originally posted by blackcat4866
          Examine the transfer roller gear, and the gear on the drum. When those gears become excessively worn, the rollers separate, causing poor transfer at the rear. It may also pull developer giving you developer copies toward the rear.

          If your customer is using 20# paper or lighter, as a temporary fix you can remove the gear on the transfer roller. It will idle all right on lighter paper. If you enduser attempts to use heavier paper you'll get jamming and stretched images. =^..^=

          Thanks, I'll try that. The Drum is brand new so no worries there, but the transfer roller gear could be removed on follow up.

            Comment

            • CopyFreak
              Technician
              • Jul 2013
              • 27
              #4
              Re: Sharp AR-M450n with Un-even Copy Quality

              Any other input on this copy quality issue ? ( see attached images in OP )

              I will go on-site for this client later this week and I'd like to address any other angles I might be overlooking, including the transfer roller gear already mentioned by Blackcat4866.

                Comment

                • Silvertoast
                  Trusted Tech

                  250+ Posts
                  • Feb 2010
                  • 270
                  #5
                  Re: Sharp AR-M450n with Un-even Copy Quality

                  the transfer gear is a likely cause as stated above. another thing is the left door tends to sag or lean out if a duplex unit is installed. causing the transfer to pull away from the drum unit (i honestly cant remeber if this caused void areas or dark areas) but worth checking when your there as it seems to be common around here.

                    Comment

                    • CopyFreak
                      Technician
                      • Jul 2013
                      • 27
                      #6
                      UPDATE. Re: Sharp AR-M450n with Un-even Copy Quality

                      The Transfer roller gear was the correct fix.

                      Transfer asbly looks marginal so I wlll order the entire unit.

                      Thanks again for the replies.

                        Comment

                        • blackcat4866
                          Master Of The Obvious

                          Site Contributor
                          10,000+ Posts
                          • Jul 2007
                          • 22996
                          #7
                          Re: Sharp AR-M450n with Un-even Copy Quality

                          Congratulations. Be sure to check the PS assembly (registration assembly) is not filled with developer. It's a common side affect. =^..^=
                          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

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