Dell inspiron 3593 Charging Fault

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  • Indunil555
    Member
    • Jul 2021
    • 17
    • Sri Lanka
    #1

    Dell inspiron 3593 Charging Fault

    Dell inspiron 3593
    FDI55 LA - J081P Motherboard
    Rev 1.0

    Laptop Battery not charging.
    Laptop work only battery power.
    Adaptor connected ( 19v DC Jack) Motherboard main voltages ok but no display and not charging.
    One time white led and 3 time orange led blinking continue.
    Charged battery install after laptop power on and display ok.

    What is the problem ?
    How to fix it ?
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14042
      • Canada
      #2
      Re: Dell inspiron 3593 Charging Fault

      Are you using the original and recommended power adapter for this laptop?

      This is important as the logic board checks for a special ID that is extracted from the power adapter over a single wire communication for a valid match. If the adapter is not suitable or the ID check fails, this may be the result.

      If ok, the 19v should power the logic board.

      You may have defective DCin mosfets. This is a common fault. Link or post the schematic for this logic board. Have not checked my database for the same.

      Remove all power. Check the resistance across the mosfet pins.

      Source & drain
      Source& gate
      Gate & drain

      Post the measurements. Then repeat for the next DCin mosfet. Also share the charger IC markings near this mosfet area. Likely to be the "BQ" series from TI (not the rapper).

        Comment

        • mon2
          Badcaps Legend
          • Dec 2019
          • 14042
          • Canada
          #3
          Re: Dell inspiron 3593 Charging Fault

          Found the schematics.

          See attached.

          Remove all power -> meter in resistance mode.

          Check the resistance across the 2 x DCin mosfets as follows:

          source (1-2-3) & drain (5-6-7-8) ; pick any pin from the group
          source (1-2-3) & gate (4)
          gate (4) & drain (5-6-7-8)

          Post the measurements and the scale used on your meter.

          Repeat for PQB11 and also PQB12.
          Attached Files

            Comment

            • Indunil555
              Member
              • Jul 2021
              • 17
              • Sri Lanka
              #4
              Re: Dell inspiron 3593 Charging Fault

              Originally posted by mon2
              Found the schematics.

              See attached.

              Remove all power -> meter in resistance mode.

              Check the resistance across the 2 x DCin mosfets as follows:

              source (1-2-3) & drain (5-6-7-8) ; pick any pin from the group
              source (1-2-3) & gate (4)
              gate (4) & drain (5-6-7-8)

              Post the measurements and the scale used on your meter.

              Repeat for PQB11 and also PQB12.

              Thanks
              Mosfet are ok
              checked.

                Comment

                • mon2
                  Badcaps Legend
                  • Dec 2019
                  • 14042
                  • Canada
                  #5
                  Re: Dell inspiron 3593 Charging Fault

                  Post the resistance readings.

                    Comment

                    • Indunil555
                      Member
                      • Jul 2021
                      • 17
                      • Sri Lanka
                      #6
                      Re: Dell inspiron 3593 Charging Fault

                      Originally posted by mon2
                      post the resistance readings.
                      pqb11
                      s-d 4.1mΩ
                      s-g 3.6mΩ
                      d-g 8.7mΩ

                      pqb12
                      s-d 2.5mΩ
                      s-g 3.6mΩ
                      d-g 8.4mΩ
                      Attached Files
                      Last edited by Indunil555; 08-27-2022, 10:54 PM.

                        Comment

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                          Dell inspiron 3593
                          FDI55 LA - J081P Motherboard
                          Rev 1.0

                          Laptop Battery not charging.
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                          Adaptor connected ( 19v DC Jack) Motherboard main voltages ok but no display and not charging.
                          One time white led and 3 time orange led blinking continue.
                          Charged battery install after laptop power on and display ok.

                          What is the problem ?
                          How to fix it ?
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