Strange problem charging battery Toshiba Z50-E

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  • huzo
    Senior Member
    • Sep 2014
    • 178
    • CROATIA
    #1

    Strange problem charging battery Toshiba Z50-E

    First of all i haven't found the board number other then FLESSY2 G4227A A4227A etched under the DC in connector...

    The problem is laptop does not charge the battery...Laptop works on battery and work on charger, but doesn't charge the battery... when off, it pulls 0.13A ,when turned on it pulls around 0.500A and has spikes 0.6-0.8 A when booting, i found that ISL9238H is the charging regulator and i replaced it with ISL 9538H and it's all the same...i checked all the passive components and all seem to be ok...

    Anyone have an idea what to look for next? The battery is brand new and i have another same laptop and battery charges in that laptop fine...

    Could there be a blacklist for replacement batteries in bios so that they don't charge?
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 13894
      • Canada
      #2
      Remove all power. Meter in diode mode. Red meter probe to ground. Black meter probe to point to test.

      Test each pin of the battery connector on the logic board in this diode mode. Post each measurement.

        Comment

        • huzo
          Senior Member
          • Sep 2014
          • 178
          • CROATIA
          #3
          I did that yesterday, but unfortunately i didn't write any values, but there were no shorts...that's why i changed the 9538H...but i can do it from the outside, the battery is removable...picture attached
          Attached Files

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 13894
              • Canada
              #4
              No shorts here. Connect the battery and check the voltage to ground of these same pins. We are checking to confirm the battery detect pin; the SMBUS SCL / SDA lines are ok.

              When the battery is connected, are you able to view the details of the connected battery? This information is extracted over the same SMBUS SCL / SDA lines.

                Comment

                • huzo
                  Senior Member
                  • Sep 2014
                  • 178
                  • CROATIA
                  #5
                  Yes the battery is detected and working,it's discharging,it's showing percentage,everything is working, on battery alone, on charger alone , but it doesn't charge the battery, when i pull the battery out it remains on the AC power working, i plug the charger back it goes on AC power and it's not charging but it says it is charging,there is an icon ,it's saying plugged in and charging, the battery icon goes up and up but it never gets charged, the voltage of the battery is not going up at all. i had the board out yesterday and measured the voltage on the mosfet from battery and there is 15.8V from the battery, on the other side of the mosfet there is 19V when charger attached, when battery is out i get 15.8V from both sides and laptop runs ......i am not a proffesional, but i have enough experience in board repair and i have exhausted all my knowledge...so i got an idea is battery maybe blacklisted since it's aftermarket and it does discharge it , but won't charge it?

                    Comment

                    • mon2
                      Badcaps Legend
                      • Dec 2019
                      • 13894
                      • Canada
                      #6
                      Interesting but it charges on another identical laptop? Then it cannot be the blacklist issue.

                      Remove all power. Meter in resistance mode (not diode). Measure the resistance across the battery mosfet that you mentioned in the last post.

                      Check:

                      source (1-2-3) & drain (5-6-7-8)
                      source (1-2-3) & gate (4)
                      gate (4) & drain (5-6-7-8)

                      Post each measurement. Compare these values to the other identical system. Also, is the charger IC truly a replacement for the original?

                        Comment

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