Mxm453n grey background

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  • SDtech619
    Technician

    Site Contributor
    • Dec 2013
    • 40
    #1

    Mxm453n grey background

    Ok I'm chasing my tail here...the background is very slight when you do internal prints and of course it gets darker when making a copy. Replaced dev unit,dev,drum and transfer assembly...I may start shooting for a board?? Suggestions, please! Checked some AE sim...and some other density simulations...Thx ahead of time
    Tags: 453, grey background
    • drowranger
      Trusted Tech

      100+ Posts
      • Jul 2015
      • 122
      #2
      Re: Mxm453n grey background

      change the mc grid & drum blade first . can be either. then the process unit

      also check the sim 46-19 auto exposure gamma setting default is mode 2, mode 1 will make it darker

        Comment

        • bilyahn
          Service Manager

          1,000+ Posts
          • Dec 2006
          • 1462
          #3
          Re: Mxm453n grey background

          drowranger is correct with this. Have had it happen a couple of times and both were caused by the charge unit. One of the instances was with a fairly low meter machine (50K).

          Good luck.

          Bil

            Comment

            • Jhonjon
              Trusted Tech

              100+ Posts
              • Sep 2013
              • 207
              #4
              Re: Mxm453n grey background

              Originally posted by SDtech619
              Ok I'm chasing my tail here...the background is very slight when you do internal prints and of course it gets darker when making a copy. Replaced dev unit,dev,drum and transfer assembly...I may start shooting for a board?? Suggestions, please! Checked some AE sim...and some other density simulations...Thx ahead of time
              Correct me if I'm wrong the problem of your machine is overtone?! A lot of this machine i handle, overtone is one problem i frequently encountered. Replacing consumables resolve some of the issue but some problem I've encountered is cause by the user who want to save money by purchasing compatible toner. Some problem is the compatible upper fuser roller toner stuck to it...

                Comment

                • SDtech619
                  Technician

                  Site Contributor
                  • Dec 2013
                  • 40
                  #5
                  Re: Mxm453n grey background

                  Thanks for the suggestions guys...I'll reply with fix once I figure it out. This equipment is in a prison and well I certainly don't want to go back there any time soon. Customer hasn't noticed but I want to address the problem before it gets worse. I'll be checking on it bent time I go in. Thx again!

                    Comment

                    • SDtech619
                      Technician

                      Site Contributor
                      • Dec 2013
                      • 40
                      #6
                      Re: Mxm453n grey background

                      FIXED-UPDATE

                      So it ended up being the development bias was way off. Used simulation 8-1 to fine tune it. Thanks guys!!

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