MX touchscreen issue

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  • bigdaddyooo
    Trusted Tech

    Site Contributor
    100+ Posts
    • Dec 2014
    • 202

    #1

    MX touchscreen issue

    I have a machine that the touchscreen is going out of calibration a few times a month. Has anyone ever had this issue? We always have to use SW3 on the MFP pwb to recalibrate the screen. Is this info stored on the MFP or PCU eeprom? I cant for the life of me figure this out. TYIA for your help
    Are you the police? "No ma'am, were musicians"
  • mansart
    Senior Tech

    Site Contributor
    500+ Posts
    • Apr 2009
    • 852

    #2
    Re: MX touchscreen issue

    Do you have access to another panel?

    I would swap entire unit and see if the problem travels.

    Comment

    • mansart
      Senior Tech

      Site Contributor
      500+ Posts
      • Apr 2009
      • 852

      #3
      Re: MX touchscreen issue

      As for boards I would start with LVDS board, then SCN MFP board..... see below

      LVDS PWB Converts the display data signal to the LCD display signal from SCN MFP PWB and controls the touch panel

      Comment

      • mojorolla
        The Wolf

        2,500+ Posts
        • Jan 2010
        • 2562

        #4
        Re: MX touchscreen issue

        Depending on which MX series machine you are referring to, there is a dip switch on the MFP board that forces calibration of the operation panel.
        These are the same dip switches that were used for Admin password reset.


        Failing to plan is planning to fail!!!

        Comment

        • mansart
          Senior Tech

          Site Contributor
          500+ Posts
          • Apr 2009
          • 852

          #5
          Re: MX touchscreen issue

          He has already done the DIP switch calibration; I'm guessing it just doesn't hold calibration.


          BTW.... I love the THEY SMELL FEAR icon. I often tell customers to establish an imaginary circle around the machine. As they cross this line, I instruct them to say three times fast "These copies aren't important, it not essential they be done" I tell them this disables the CRITICAL DETECTOR. If you cross the line looking over your shoulder, saying I'll have these copies to you in a second, all bets are off.

          Comment

          • bigdaddyooo
            Trusted Tech

            Site Contributor
            100+ Posts
            • Dec 2014
            • 202

            #6
            Re: MX touchscreen issue

            [QUOTE=mansart;2189943]He has already done the DIP switch calibration; I'm guessing it just doesn't hold calibration.

            EXACTLY
            Are you the police? "No ma'am, were musicians"

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            • D_L_P
              Self Employed

              1,000+ Posts
              • Oct 2009
              • 1196

              #7
              Re: MX touchscreen issue

              If you haven't already remove the touchscreen and clean all the way to the edges. I used to use a scrap of paper to clean under the edges but I think those panels come apart fairly easy. If any dirt or moisture gets under the plastic bezel it can throw off calibrations.
              In a few rare cases the plastic was actually touching the touch panel and throwing it off.

              Comment

              • bilyahn
                Service Manager

                1,000+ Posts
                • Dec 2006
                • 1462

                #8
                Re: MX touchscreen issue

                Originally posted by D_L_P
                If you haven't already remove the touchscreen and clean all the way to the edges. I used to use a scrap of paper to clean under the edges but I think those panels come apart fairly easy. If any dirt or moisture gets under the plastic bezel it can throw off calibrations.
                In a few rare cases the plastic was actually touching the touch panel and throwing it off.
                I have had a small dimple in the screen cause this also. Wound up replacing the touch screen to fix it.

                Good luck

                Bil

                Comment

                • bigdaddyooo
                  Trusted Tech

                  Site Contributor
                  100+ Posts
                  • Dec 2014
                  • 202

                  #9
                  Re: MX touchscreen issue

                  [QUOTE=mansart;2189938]As for boards I would start with LVDS board, then SCN MFP board..... see below

                  LVDS PWB Converts the display data signal to the LCD display signal from SCN MFP PWB and controls the touch panel[/QU



                  I just reconnected both ends of the FFC so now its a waiting game. I'm pretty confident it will take care of it.
                  Are you the police? "No ma'am, were musicians"

                  Comment

                  • Blind Avocado
                    Technician
                    • Jan 2021
                    • 38

                    #10
                    Re: MX touchscreen issue

                    Originally posted by D_L_P
                    If you haven't already remove the touchscreen and clean all the way to the edges. I used to use a scrap of paper to clean under the edges but I think those panels come apart fairly easy. If any dirt or moisture gets under the plastic bezel it can throw off calibrations.
                    In a few rare cases the plastic was actually touching the touch panel and throwing it off.
                    This is exactly right. I have seen this many times. If is still acts up after cleaning then you need to replace the digitizer, which is the glass part on top of the LCD screen.

                    Comment

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