Acer e5-553 battery not detected error

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  • ahmarzo
    Senior Member
    • Mar 2015
    • 168
    • india
    #1

    Acer e5-553 battery not detected error

    Have laptop motherboard da0zabmb6e0 rev e showing battery not detected problem.while checking have
    Pin 3 - 3v
    Pin 4 - 3 v
    Pin 5 without battery 3 v with battery connected 0v
    Pin 6- 0.56v
    Pin 7&8 - 8.44v

    Have tried new battery and changed bq737
    When BATT Detect SW is pressed pin5 voltage goes to 0v
    Have traced pin 3 and pin 4 to the it8987e.




    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 13994
      • Canada
      #2
      Confirm that the series resistors @ PR56 and PR57 are ok = ~ 100 ohms each.

      Is the battery compatible with this unit? Have you tested with another known good battery?

        Comment

        • mcplslg123
          Badcaps Legend
          • Jun 2015
          • 7262
          • india
          #3
          BQ737
          01.Measure resistance between ACN/ACP & SRP/SRN pins (no power connected)
          02.ACOK/ACDET/REGN voltage
          03.Voltage on Source/Gate/Drain of dc-in fets.

            Comment

            • ahmarzo
              Senior Member
              • Mar 2015
              • 168
              • india
              #4
              pr56 and 56 are 100 ohms confirmed

              resistance between acn and acp 0 ohms and srp an srn is 1.8 mega ohms
              acok -0v,acdet is 2.8v, regn is 6v
              voltage on dc in source 19.4v,gate 8.3v and drain 19v

                Comment

                • mcplslg123
                  Badcaps Legend
                  • Jun 2015
                  • 7262
                  • india
                  #5
                  Resistance between SRP/SRN should be few ohms and not mega ohms. This indicates problem. Check the resistor connected to SRN/SRP pins and match with schematic. The battery CLR is Ok or burnt? Meter in diode mode-check continuity between SRN/SRP pins of charger IC to Battery CLR.

                    Comment

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