da0r75mb6cd0 REV: C problem.

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  • highpulse
    i hate HP
    • May 2013
    • 1488
    • portugal

    #1

    da0r75mb6cd0 REV: C problem.

    Hi guys , got here a problem with a recent machine that enter the lab ,

    its a hp 15-e050sp the problem as charger port damaged , so we've ordered a new dc jack for it and we received we asked the client to bring us is powersupply since it is this new HP dc jack with bluetip with center pin but the smaller one, i didnt have this tip for my charger and client also was with center pin damaged , so we've bought a new charger for it , but not turning on and no dc jack led light turning on as well , usually this is bios or system charger . but would like to make some measures first before buying whatsoever i will need , but not finding this schematic to download at all , also was trying to chek pinnout for the BQ728 or also can be BQ24728 for i can know if all is ok with system charger before ordering one .
    Also notice that i really dont have 3.3 or 5 volts on coils , but that i supose its a security measure to save energy and this will be only present when S5 is enabled . i got 3.3 on on off button and drop to 0 when pressed , and also got 3.3 volts on the bios as well , possible feeded by LDO of step controler . also got 5v LDO on the step controler (meanwhile dont know wich STEP controler is this and they are 2 right near each outher .
    Now before ordering any part i would like to be more sure of what part buying , so if anyone have this board or schematic that can give me some pin values for the Charger ic i would be very greatful

    meanwhile i leave here the values i got on the charger IC :

    1- 19.8v
    2- 19.8v
    3- 19.8v
    4- 24,9v
    5- 2.8v
    6- 2.5v
    7- 0
    8- 3.2v (between 3.1 and 3.2)
    9- 3.2v (between 3.1 and 3.2)
    10- 3.1v
    11- 2.5v
    12- 2.5v
    13- 2.5v
    14- 0v
    15- 0v
    16- 5.8v
    17- 5.8v
    18- 2.4v
    19- 2.4v
    20- 19.8volts


    PS - also donwloaded bios from the hp site , inside of the exe file , there were 2 .bin files with same size just different dates , i saved the dump and tryed with both , still the same so i can see bios is not the problem .

    Wait for some good news from you guys.

    thk in advance

    jonathan
    Last edited by highpulse; 08-27-2014, 11:47 AM.
  • atsio
    Badcaps Veteran
    • Oct 2013
    • 819
    • Greece

    #2
    Re: da0r75mb6cd0 REV: C problem.

    Check voltage on pins 1, 6 and 12 of PU12 and PU13

    Comment

    • highpulse
      i hate HP
      • May 2013
      • 1488
      • portugal

      #3
      Re: da0r75mb6cd0 REV: C problem.

      ok wi.ll do it now

      Comment

      • highpulse
        i hate HP
        • May 2013
        • 1488
        • portugal

        #4
        Re: da0r75mb6cd0 REV: C problem.

        pin 1 .19.8v on both pu12 and 13
        pin 6 pu12 3.2 v
        pin6 pu13 4.9 V

        seems ok

        Comment

        • highpulse
          i hate HP
          • May 2013
          • 1488
          • portugal

          #5
          Re: da0r75mb6cd0 REV: C problem.

          im divided between charger ic and KB ...but would like to be more sure about whats is causing this issue

          Comment

          • highpulse
            i hate HP
            • May 2013
            • 1488
            • portugal

            #6
            Re: da0r75mb6cd0 REV: C problem.

            ATsio do you have this schematic or a board with youΒ»?

            Comment

            • atsio
              Badcaps Veteran
              • Oct 2013
              • 819
              • Greece

              #7
              Re: da0r75mb6cd0 REV: C problem.

              Do you have an osilloscope? If yes check for data signals at pin 1 of U13 and U14.
              Check voltages on pins 11,18,21,69,71,74,125,127 of ec controller and pin 5 of DC jack

              Comment

              • khaahk
                Badcaps Veteran
                • Dec 2013
                • 754
                • Estonia

                #8
                Re: da0r75mb6cd0 REV: C problem.

                Schematic rev 1A
                Attached Files

                Comment

                • atsio
                  Badcaps Veteran
                  • Oct 2013
                  • 819
                  • Greece

                  #9
                  Re: da0r75mb6cd0 REV: C problem.

                  Originally posted by highpulse
                  ATsio do you have this schematic or a board with youΒ»?
                  A working board returning to customer tomorrow.

                  Comment

                  • atsio
                    Badcaps Veteran
                    • Oct 2013
                    • 819
                    • Greece

                    #10
                    Re: da0r75mb6cd0 REV: C problem.

                    Originally posted by khaahk
                    Schematic rev 1A
                    Thanks for the schematic

                    Comment

                    • highpulse
                      i hate HP
                      • May 2013
                      • 1488
                      • portugal

                      #11
                      Re: da0r75mb6cd0 REV: C problem.

                      EC

                      11- 0v
                      18- 3.35v
                      21- 2.97v
                      69- 2.76
                      71- 0.78
                      74- 3.34
                      125 and 127 - 3.34v

                      pin 5 dc jack 0.04v ( the pinout is not very seenable but since it show me pin 2 and 8 i assume that pin 5 is the one i measure

                      onfortunetly , i work for a shop that its very hard to make them buy me gear to work even some of the stuff i've got its frmo my place .....
                      but very soon will leave this and open busyness with a colegue. so for DATA signal i cant help you atsio , sorry.

                      khaahk thk for schematic
                      Last edited by highpulse; 08-28-2014, 04:04 AM.

                      Comment

                      • highpulse
                        i hate HP
                        • May 2013
                        • 1488
                        • portugal

                        #12
                        Re: da0r75mb6cd0 REV: C problem.

                        seems not having +3v for ec controler .

                        well it will bve normal since this voltage i will only have after s5 enable (due to step controler not beeing sending 3.3vs5 and +5vs5
                        Last edited by highpulse; 08-28-2014, 03:23 AM.

                        Comment

                        • atsio
                          Badcaps Veteran
                          • Oct 2013
                          • 819
                          • Greece

                          #13
                          Re: da0r75mb6cd0 REV: C problem.

                          Do you have the discrete or uma version of the board?

                          Comment

                          • highpulse
                            i hate HP
                            • May 2013
                            • 1488
                            • portugal

                            #14
                            Re: da0r75mb6cd0 REV: C problem.

                            Atsio since there is no GPU dedicated to this so its a UMA

                            Comment

                            • atsio
                              Badcaps Veteran
                              • Oct 2013
                              • 819
                              • Greece

                              #15
                              Re: da0r75mb6cd0 REV: C problem.

                              As you imagined, probably problem with IT8528 but first check and the second bios ic (U13) with the programmer if it is allright.

                              Comment

                              • highpulse
                                i hate HP
                                • May 2013
                                • 1488
                                • portugal

                                #16
                                Re: da0r75mb6cd0 REV: C problem.

                                there is only one bios here , u13 u14 same place only one ROM , 25q32fv winbond donwloaded from HP site the EXE file have 2 Bin files , tryed both (they have 4.3 mb , but still the same , flashs ok , no errors .

                                could this be a damaged rom IC ? will replace with the exact size in mb rom chip with another and reflash to see , if no news , well guess then ITE is doomed

                                Comment

                                • highpulse
                                  i hate HP
                                  • May 2013
                                  • 1488
                                  • portugal

                                  #17
                                  Re: da0r75mb6cd0 REV: C problem.

                                  or if you have a good dump for this ROM and you can share just to make sure i apreciate in advance

                                  Comment

                                  • dycc
                                    Vision
                                    • Nov 2011
                                    • 624
                                    • CΓ΄te d'Ivoire

                                    #18
                                    Re: da0r75mb6cd0 REV: C problem.

                                    I recommend flashing u13 first

                                    got one with same issue one day and flashing ec bios solved it

                                    Comment

                                    • dycc
                                      Vision
                                      • Nov 2011
                                      • 624
                                      • CΓ΄te d'Ivoire

                                      #19
                                      Re: da0r75mb6cd0 REV: C problem.

                                      Ok bios
                                      Attached Files

                                      Comment

                                      • highpulse
                                        i hate HP
                                        • May 2013
                                        • 1488
                                        • portugal

                                        #20
                                        Re: da0r75mb6cd0 REV: C problem.

                                        Dycc thk you for the rom , alltough this one had issues with DC jacket all pins were messed out and damaged charger as well , let see if your dump save me time for my client will flash it now

                                        Comment

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