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need help on HMI allen bradley versaview 1700M

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    need help on HMI allen bradley versaview 1700M

    Hi my friends,
    please I need help to repair the HMI allen bradley versaview 1700M .the problem is the HMI runs normally whemn switching on.and after few seconds the screen becomes black.please can you help even please documents,schemes of this HMI.

    thanks

    #2
    Re: need help on HMI allen bradley versaview 1700M

    any help please?

    Comment


      #3
      Re: need help on HMI allen bradley versaview 1700M

      Can you still see whats on the screen if you shine a light at it? does the backlight stay on? could be ccfl or inverter failure
      I doubt you will find a service manual or schematic for AB
      Last edited by R_J; 09-06-2018, 02:49 PM.

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        #4
        Re: need help on HMI allen bradley versaview 1700M

        Originally posted by R_J View Post
        Can you still see whats on the screen if you shine a light at it? does the backlight stay on? could be ccfl or inverter failure
        I doubt you will find a service manual or schematic for AB
        thanks R_J,when I power on the backlight are On but after few seconds they become off

        Comment


          #5
          Re: need help on HMI allen bradley versaview 1700M

          But Can you still see the video on the screen if you shine a light on it. If you can the fault might be a faulty inverter or ccfl, Open it up and provide some pictures of what is inside.

          Comment


            #6
            Re: need help on HMI allen bradley versaview 1700M

            the inverter is EMAX PLCD0915411

            Comment


              #7
              Re: need help on HMI allen bradley versaview 1700M

              Originally posted by R_J View Post
              But Can you still see the video on the screen if you shine a light on it. If you can the fault might be a faulty inverter or ccfl, Open it up and provide some pictures of what is inside.
              thank you R_J tomorrow,I attached the pictures of the HMI
              Attached Files

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                #8
                Re: need help on HMI allen bradley versaview 1700M

                these are other pictures
                Attached Files

                Comment


                  #9
                  Re: need help on HMI allen bradley versaview 1700M

                  Check the voltages on the inverter plug when unit is first turend on. There are 6 wires, I suspect the two yellow are supply, the two black are ground, the single red could be inverter ON, and the white could be DIM
                  If the voltages stay the same when the display goes dark, the fault could be on the inverter or a bad ccfl lamp
                  I would guess the supply voltage will be 12 volts, inverter on is likely 5 volts, dim would be variable between 0-5 volts and might be a negative voltage

                  In that first picture of the logic board, and near the label [13AZ53-02-012] seems to be a legend for one of the plugs, I see:
                  pin 1-3 ??
                  pin 4 Bright
                  Pin 5 Back-Light ON\OFF
                  pin 6-7 GND
                  Last edited by R_J; 09-07-2018, 05:41 PM.

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                    #10
                    Re: need help on HMI allen bradley versaview 1700M

                    yesterday I did the test when the screen was dark .the voltage in the yellow wire of the inverter is 5V,and on the red wire is 12V.i tested with new backlight i got the same result

                    Comment


                      #11
                      Re: need help on HMI allen bradley versaview 1700M

                      So what changed from when the screen works and when it goes dark?
                      What do you mean by tested with NEW backlight?
                      New CCFL lamps?
                      NEW inverter board?

                      Comment


                        #12
                        Re: need help on HMI allen bradley versaview 1700M

                        thanks R_J when I tested I did not measure voltage before it went dark,I tested with New CCFL lamps.

                        Comment


                          #13
                          Re: need help on HMI allen bradley versaview 1700M

                          Hi Did you get it sorted as i am in the same boat? Where can i get a new inverter.Thanks

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