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DELL INSPIRON 5593 FDI45 la-j091p no power on

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    DELL INSPIRON 5593 FDI45 la-j091p no power on

    Hi all, kindly asking for advise.

    owner tried to install a stick of ram and the does laptop does not powers on.

    the only schematic i found is here

    the charger IC is ISL 95522H and it is getting very hot.

    without battery

    DCIN is 17.4V
    ACIN is 2.4V
    VDD is 0.4
    CMSRC 0

    main power rail is missing power.

    Do you think charger IC is dead ?
    Last edited by koby058; 05-30-2023, 01:39 AM.

    #2
    Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

    Sir you check the main Func = 3.3VALWP / 5VALWP if shorted

    Comment


      #3
      Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

      resistance on all coils is pretty high except for the near GPU coils which is about 3 ohms

      Comment


        #4
        Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

        Measure the voltage to ground on each pin of the dual diode at PDB01.

        Also at each pin of the DCin mosfet at PQB11.

        Source (1-2-3)
        Gate (4)
        Drain (5-6-7-8)

        Comment


          #5
          Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

          Hi mon2 , thanks for your reply and help

          Buy chance can you point me the the area of those components, the brdv i have is not correct
          Last edited by koby058; 05-30-2023, 08:27 AM.

          Comment


            #6
            Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

            See attached. Found this (if it is correct) by searching for '5593'.
            Attached Files

            Comment


              #7
              Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

              Found this diode butbit is a single diode

              Do you think this is it?
              I think that The suggested schematics is not exactly for this board
              Attached Files

              Comment


                #8
                Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                PQB11 = mosfet and should be 8 pins.

                Post a pic of your logic board. Perhaps have a suitable BV file but it is locked to my sub but it may help.

                Comment


                  #9
                  Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                  I was talking about the double diode

                  Here is the board pics with the best light i have
                  Attached Files

                  Comment


                    #10
                    Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                    Which double diode? Can you point to it on the motherboard?
                    Attached Files

                    Comment


                      #11
                      Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                      Originally posted by mon2 View Post
                      Measure the voltage to ground on each pin of the dual diode at PDB01.

                      Also at each pin of the DCin mosfet at PQB11.

                      Source (1-2-3)
                      Gate (4)
                      Drain (5-6-7-8)
                      I think we have a confusion.

                      Here you ask me to measure voltage on the dual diode, and i called it double diode. but i cannot find such dual diode
                      instead i have found a single diode on PDB01. as visible in picture on post #7.

                      Comment


                        #12
                        Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                        As per post#1, VDD on charger ic is 0.4V .What is the exact resistance here? What about ACOK on charger IC?

                        Comment


                          #13
                          Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                          Hi

                          Resistance on VDD is 2 ohms

                          voltage on ACOK is 0.09v

                          resistance on ACOK 12 ohms

                          Comment


                            #14
                            Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                            Did you measure without power present? If yes, you indeed seem to deal with a shorted charging controller. It does not fit to the shared history though.
                            FairRepair on YouTube

                            Comment


                              #15
                              Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                              Hi, I am always measure resistance without power

                              I have subscribed to your channel looks good

                              Comment


                                #16
                                Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                                Originally posted by koby058 View Post
                                Hi

                                Resistance on VDD is 2 ohms

                                voltage on ACOK is 0.09v

                                resistance on ACOK 12 ohms
                                Remove the charger IC and measure these same resistance to GND again.

                                Comment


                                  #17
                                  Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                                  Hi

                                  I have replaced this charger IC and now the laptop turns on but the charger IC is still getting very hot,

                                  How can i continue inspection of the issue ?

                                  Comment


                                    #18
                                    Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                                    Just move around the charging controller in Ohms mode and see whether there is still a short to GND present. And next time you need to do that after you have removed the old one but before soldering the replacement. Sanity checks.
                                    FairRepair on YouTube

                                    Comment


                                      #19
                                      Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                                      Hi

                                      I have measured resistance on all pins of this charger IC, the lowest was 40 ohms some pins was OL.

                                      i can see that the laptop is back to the same state the owner explained to me.

                                      where the laptops starts and working very slow and no charging

                                      Any other advise ?

                                      Comment


                                        #20
                                        Re: DELL INSPIRON 5593 FDI45 la-j091p no power on

                                        No, 40 Ohms are bad. You didn't realize? Share where you measured the low values and how much exactly.
                                        FairRepair on YouTube

                                        Comment

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