Acer ES1-571 works from battery but not charging

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  • sellit
    Senior Member
    • Jun 2017
    • 104
    • Latvia
    #1

    Acer ES1-571 works from battery but not charging

    Got Acer Aspire ES1-571 DOMINO_BH MB 15300-1
    Replaced from donor MB PU4403, PU4402, PU4404, PU4405, PQ4406, PQ4401 no changes. Laptop works fine from charger and from battery, but not charging. Blinking orange light. Original battery not working - locked, tested with two new (known good) batteries, Not charging. Please any advice.

    My measurements:
    Charger BQ24737 PU4403
    Charger+Battery| Battery | Charger only
    1 ACN 19.5 | 14.94 | 19.50
    2 ACP 19.5 | 14.94 | 19.50
    3 CMPOUT 0.01 | 0.22 | 0.00
    4 CMPIN 0.06 | 0.00 | 0.06
    5 ACOK# 0.00 | 3.33 | 0.00
    6 ACDET 2.65 | 0.03 | 2.65
    7 IOUT 0.10 | 0.00 | 0.10
    8 SDA 3.35 | 3.35 | 3.36
    9 SCL 3.35 | 3.35 | 3.36
    10 ILIM 3.33 | 3.33 | 3.33
    11 BM# 3.36 | 3.36 | 3.35
    12 SRN 15.13 | 14.90 | 3.44
    13 SRP 15.13 | 14.90 | 3.45
    14 GND 0.00 | 0.00 | 0.00
    15 LODRV 0.00 | 0.00 | 0.00
    16 REG 6.07 | 0.23 | 6.07
    17 BTST 14.84 | 14.60 | 5.96
    18 HIDRV 15.12 | 14.89 | 3.44
    19 PHASE 15.12 | 14.89 | 3.46
    20 VCC 19.49 | 0.26 | 19.49

    Battery conector BTY1
    Charger+Battery |Battery | Charger only
    1 BT+ 15.12 | 14.90 | 3.44
    2 BT+ 15.12 | 14.90 | 3.44
    3 BAT_G 0.00 Goes to GND(battery present pin)
    4 BAT_IN#_1 0.3 | 0.30 | 3.33
    5 BATA_SCL_1 3.35|3.35 | 3.36
    6 BATA_SDA_1 3.35|3.35 | 3.36
    7 GND 0.00
    8 GND 0.00
    Attached Files
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14012
      • Canada
      #2
      Re: Acer ES1-571 works from battery but not charging

      Use flux and hot air to confirm there are no soldering issues with the replaced charger IC. Especially pins 18 and 19 on this device. Power down, remove battery, meter in resistance mode and check for shorts between 18 & 19.

        Comment

        • sellit
          Senior Member
          • Jun 2017
          • 104
          • Latvia
          #3
          Re: Acer ES1-571 works from battery but not charging

          Originally posted by mon2
          Use flux and hot air to confirm there are no soldering issues with the replaced charger IC. Especially pins 18 and 19 on this device. Power down, remove battery, meter in resistance mode and check for shorts between 18 & 19.

          Resoldered charger IC, when powered down between pins 18 and 19 have resistance 26kOhm and 100kOhm then meter probes switched. I have the same voltage on both pins then connected to PSU or Battery. Without High side mosfet the same.

            Comment

            • sellit
              Senior Member
              • Jun 2017
              • 104
              • Latvia
              #4
              Re: Acer ES1-571 works from battery but not charging

              Update
              Fixed laptop. Tested with wrong batteries. Original battery was AC14B18J 11.31V. Tested with AC14B8K 15.2V. Got another battery - charging correctly now.

                Comment

                • mon2
                  Badcaps Legend
                  • Dec 2019
                  • 14012
                  • Canada
                  #5
                  Re: Acer ES1-571 works from battery but not charging

                  Excellent !

                    Comment

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