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    LVDS controller cable

    Troubleshooting
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    • D
      Daiki last edited by

      Hello, thank you to accept me in this forum,
      I start to work with LDSV controller but i have an issue.
      I bought a controller PCB800099 V0.9 who are normally compatible with screen HSD100IFW1 - A0 but my screen are little different HSD100IFW1 - F01
      The only difference i found it’s about two pins on connector. (28 and 30).
      Do you knwo if it’s possible to modify the cable for work ?

      A-0
      A0.png

      F01
      F01.jpg

      Cable shema
      schema cable.jpg

      Thank you for your help.

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      • M
        MadScientist last edited by MadScientist

        I am not really sure how correct I am but it looks to me that those pins are for the LED backlight of the LCD panel. As far as I can see the LCD controller board doesn’t have an in-build LED driver. VDD and V(LED_EN) are both 3.3V. Maybe combine those pins with pin 2 and 3 and see what happens.

        Of course there is always a risk of frying your panel so I am not taking any responsibility! It’s just a suggestion of what you could try to do. Please report once you got it to work.

        D 1 Reply Last reply Reply Quote 0
        • D
          Daiki @MadScientist last edited by

          @MadScientist I tried but screen just flickering (screen flash blank)
          I have a good power 4A, not easy , but it’s better before there was nothing 🙂

          M 1 Reply Last reply Reply Quote 0
          • M
            MadScientist @Daiki last edited by

            @Daiki Do you have an extra LED driver for LCDs? You could take the connections from there. Kinda like in this picture:

            lcd.jpg

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            • D
              Daiki last edited by Daiki

              Yes i have on the controller it’s use with 5V 😕
              on the picture below the power supply for led are connected on item 9
              Annotation 2020-05-10 005056.jpg

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              • M
                MadScientist last edited by

                Maybe try a MOSFET to get 3.3V. However, I am not very confident that would work. I don’t understand why it didn’t work when you combined the pins 28 and 30 with 2 and 3.
                What happens when you only put 3.3V on pin 30, leaving 28 (VDD) disconnected? And what happens if you reverse it (28 = 3.3V, 30 = 0V)?

                Maybe somebody else with more experiences with LCDs could join the conversation?

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                • D
                  Daiki last edited by

                  hello sorry for my late answer, i think i will leave it , put alll in a bag and put in trash , too much problem for a small thing.
                  Thank you to help me 😉

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