Help identifying SMD component 5-6 on battery controller

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • domas
    News Hater
    • May 2013
    • 323
    • Denmark

    #1

    Help identifying SMD component 5-6 on battery controller

    Hi, i have burned the shit out of my battery controller by keeping it open and touching one of mosfet control transistors (small 3 pin p-channel sucker) with positive battery terminal. Led indicators just dim constantly on 30% of light power, battery not detected, and so on.

    Apart from the fact that controller is blocked i need to repair the circuit. I have tested most passives in-circuit. I assume that the resistors between source and gate of soic-8 mosfets were toasted as they were open. I assumed them to be 10kOhms. They were extremely small so i have made a ghetto fix. The problem persisted.

    I am not sure WTF are those white-blueish-gray "5-6" components, you can see some of them in the back of the connector terminal.

    And yes, i did actually scan the board With the goal of identifying those tiny resistors. didn't help

    And i did actually upload 2 insane high resolution files of 40mb each.
    http://domas.hard.lt/gd761-controller/scan0004.jpg
    http://domas.hard.lt/gd761-controller/scan0005.jpg

    computer dell inspiron 6400 / e1505, battery GD761
    Attached Files
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Help identifying SMD component 5-6 on battery controller

    Are they measured out as shorts, or like Diode?
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809

    Comment

    • domas
      News Hater
      • May 2013
      • 323
      • Denmark

      #3
      Re: Help identifying SMD component 5-6 on battery controller

      well, as i have tested them in circuit, they are neither.

      they have some different resistance in different directions, but that might was well be because of other components on-board.

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Help identifying SMD component 5-6 on battery controller

        I would remove one off the board and do some measurement in Diode mode, capacitor mode, etc.
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • kc8adu
          Super Moderator
          • Nov 2003
          • 8832
          • U.S.A!

          #5
          Re: Help identifying SMD component 5-6 on battery controller

          the line on one end says diodes.

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: Help identifying SMD component 5-6 on battery controller

            That is what I thought too but it can also be Tantalum cap, not 100% sure.
            Never stop learning
            Basic LCD TV and Monitor troubleshooting guides.
            http://www.badcaps.net/forum/showthr...956#post305956

            Voltage Regulator (LDO) testing:
            http://www.badcaps.net/forum/showthr...999#post300999

            Inverter testing using old CFL:
            http://www.badcaps.net/forum/showthr...er+testing+cfl

            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
            http://s807.photobucket.com/user/budm/library/

            TV Factory reset codes listing:
            http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • domas
              News Hater
              • May 2013
              • 323
              • Denmark

              #7
              Re: Help identifying SMD component 5-6 on battery controller

              i will take some time and measure it and post some results here.

              <sarcasm>i just love desoldering smd stuff< / sarcasm>, so i will just measure them in circuit. I will aso try to check if they are going from connector i/o lines to the circuitry (as a component in series if it can be called so) or they go from lines to to GND.

              I have 4 of those and iirc they are connected to sba scl and tho other outputs, system_present and one dell related output to MB.

              there is also one of them next to the push button, it seems like it is in between button's terminals.

              Comment

              • Kiriakos GR
                Banned
                • May 2012
                • 940
                • Greece

                #8
                Re: Help identifying SMD component 5-6 on battery controller

                This controller by 99,99999999% it is locked down to never charge a battery again.
                The psychical replacement of a spare part even if found damaged, it will not be of any value.

                Comment

                • eccerr0r
                  Solder Sloth
                  • Nov 2012
                  • 8695
                  • USA

                  #9
                  Re: Help identifying SMD component 5-6 on battery controller

                  If it's connected to SDA and SCL then likely they are protection diodes, possibly zeners?

                  Comment

                  • domas
                    News Hater
                    • May 2013
                    • 323
                    • Denmark

                    #10
                    Re: Help identifying SMD component 5-6 on battery controller

                    Originally posted by Kiriakos GR
                    This controller by 99,99999999% it is locked down to never charge a battery again.
                    The psychical replacement of a spare part even if found damaged, it will not be of any value.
                    no shit it is. i have stated that in my first post as well.

                    you sure about no value? there is somebody that can unlock it for me ;-)

                    Comment

                    Related Topics

                    Collapse

                    • Bowline
                      Dell E6400 PT434 type Battery Charging Stuck at 1%. Battery Pinouts?
                      by Bowline
                      My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?

                      Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?

                      My reason for asking is I have a battery which I cannot get to charge beyond 1% in a Dell E6410 or E6400.
                      The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
                      I have tried multiple different Dell power adapters. My Dell...
                      06-11-2025, 10:13 AM
                    • mkdj
                      ASUS X571 no power : battery issue?
                      by mkdj
                      Hello everyone,

                      Mark and model: ASUS X571
                      Symptoms: not turning on. There is only the LED battery indicator working. The owner of the laptop told me this problem arrived one week after having changed the battery. He then managed to power on the laptop only once, and then it never powered on again.

                      Tests already made:
                      - Battery is charging when laptop is plugged in. The LED battery indicator turns white after a couple of hours of charge, indicating that battery is fully charged. However, laptop won't turn on anyway, with or without AC plug.
                      - I have removed...
                      Yesterday, 09:16 AM
                    • techfreak9356
                      Vostro 3400 (LA-K033P) won't charge battery, everything else ok
                      by techfreak9356
                      I bought a Vostro 3400 motherboard (LA-K033P) to upgrade over my damaged Inspiron 5593 (LA-J091P) board. Everything else is ok except for the battery. This battery I am using now is already a replacement one since I disposed of the bloated original one. Back in the Inspiron 5593 motherboard, the battery charges fine and is identified just fine. However, with the upgraded motherboard, suddenly the replacement battery is labeled as "Not a dell battery". When I borrow a similar battery from my colleague (which did not have replacements yet), it is identified and charges just fine.
                      ...
                      09-14-2023, 11:10 PM
                    • Document Archive
                      ISL88739AHRZ ISL88739 Laptop Battery Charger Datasheet
                      by Document Archive
                      The ISL88739 & ISL88739AHRZ are a highly versatile combo battery charger
                      configurable for operating as either a Hybrid Power Boost (HPB)
                      charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
                      4-cell batteries. Both configurations allow the battery to work with
                      the adapter together to supply the system load when it exceeds
                      the adapter capability, referred to as system Turbo mode. HPB
                      charger configuration reverse-boosts battery energy to the system
                      bus to help the adapter provide the system power in Turbo mode.
                      NVDC charger configuration...
                      11-05-2024, 03:28 PM
                    • trepachka
                      iPad Air A1475 Boot loops after replacing battery
                      by trepachka
                      This iPad was working fine except the battery was not holding charge for more than 40 minutes. I replaced it with a new battery. I haven't glued the battery yet, just inserted it into the slot and held it with battery screw.

                      The iPad was powered on with the new battery and I am getting white screen with Apple logo for about 10 seconds, then the screen turns dark. It then cycles like this forever.

                      I know the battery is working because the iPad continues to boot loop without the charger until it depletes to 0% and the message displays I need to plug in the charger.
                      ...
                      11-08-2024, 03:17 PM
                    • Loading...
                    • No more items.
                    Working...