cfl screen inverter 6pin to 7pin

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  • Romulo
    Badcaps Veteran
    • Nov 2016
    • 484
    • Philippines
    #1

    cfl screen inverter 6pin to 7pin

    hi everyone i need help on this the ccfl screen inverter in broken on toshiba l505 laptop the inverter has 6pin and i cannot find the same replacement for this i have here available only the same size and coil but the problem is the available has 7pin it is possisble to use this to convert the 7pin to 6pin?please i need help on this please i have attached the image
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    • mielta
      Badcaps Veteran
      • Apr 2015
      • 368
      • Germany
      #2
      Re: cfl screen inverter 6pin to 7pin

      Hi
      You can try it
      By the Inverter there is one pin power (Vcc) i think 5v or 19v
      another one is enable (Backlight on/off) i think 3.3v
      an another one is ajustable voltage for brightness
      and the last one is ground
      2 Pins are not connected (nc)
      Last edited by mielta; 10-13-2017, 03:29 AM.

        Comment

        • Romulo
          Badcaps Veteran
          • Nov 2016
          • 484
          • Philippines
          #3
          Re: cfl screen inverter 6pin to 7pin

          thanks for the response mielta can you show me please how to convert with this the broken is 6pin and the available replacement is 7pin

            Comment

            • mielta
              Badcaps Veteran
              • Apr 2015
              • 368
              • Germany
              #4
              Re: cfl screen inverter 6pin to 7pin

              were the fuse is is VCC and ground you can also messure
              you must check the chip on the inverter with 7pin for an datasheet
              to find where is enable and Dim

                Comment

                • Romulo
                  Badcaps Veteran
                  • Nov 2016
                  • 484
                  • Philippines
                  #5
                  Re: cfl screen inverter 6pin to 7pin

                  i already checked the 7 pin inverter pin 1 and 2 vcc has 19v standby voltage 6 and 7 are ground when i turn on the laptop pin 3 and pin 4 have 3.3v and pin 5 have 1.2v

                    Comment

                    • mcplslg123
                      Badcaps Legend
                      • Jun 2015
                      • 7262
                      • india
                      #6
                      Re: cfl screen inverter 6pin to 7pin

                      Try by shorting pin 4 & 5 of inverter and see if voltage remains 3v. Very likely you will get backlit on.

                        Comment

                        • Romulo
                          Badcaps Veteran
                          • Nov 2016
                          • 484
                          • Philippines
                          #7
                          Re: cfl screen inverter 6pin to 7pin

                          thanks mcplslg123 but the problem is 6pin inverter the ground is pin 5 and the 7pin inverter the ground is in pin6 and pin7 i need to replace the 6pin inverter to 7pin how can possibly do this please

                            Comment

                            • mcplslg123
                              Badcaps Legend
                              • Jun 2015
                              • 7262
                              • india
                              #8
                              Re: cfl screen inverter 6pin to 7pin

                              19v to vcc pin
                              gnd to gnd
                              3v in pin 3 or 4
                              3v/1.7v on pin 4 or 5.

                              Technically thats the requirement for backlit to be on. You will need to apply 3v on those pins by permutation and combination to find out.

                              eg, vcc and gnd connected, then apply 3v on say pin3 and try putting 3/1.7v on pin 4 or 5. see which works

                                Comment

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