ISL 6264 problem. Laptop shutdown 1s less

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  • MDY
    Senior Member
    • Jan 2014
    • 75
    • Spain
    #1

    ISL 6264 problem. Laptop shutdown 1s less

    Have a laptop with MB: Pomona 06244. It is Acer Aspire 5620. It shutdown at less then 1 seg. If I remove CPU it shutdown after 15 seg and I have time to check voltage and miss vcore. If I put CPU I checked again and I really miss Vcore. I tried another CPU and it is not CPU problem. ISL6264 is the core controller and I do have:
    VIN-19V
    VDD-5V
    PVCC-5V
    VR_ON goes to 3.3V when I press power button but it jump down to 0V immediately. I removed r30 (resistor that separate VR_ON from ISL) VR_ON is maintained in 3.3V. So I discard it is VR_ON problem and should be some problem with controller or mosfets, or some caps, but I allready checked caps and mosfets and they are OK. I dont know what do check and what is next. Any idea please?
    Tags: None
    • fddizon
      Badcaps Veteran
      • Sep 2011
      • 555
      • Philippines
      #2
      Re: ISL 6264 problem. Laptop shutdown 1s less

      send schematic here. i only found acer extensa 5620. dunno if they are the same.

        Comment

        • MDY
          Senior Member
          • Jan 2014
          • 75
          • Spain
          #3
          Re: ISL 6264 problem. Laptop shutdown 1s less

          Sorry, it is travelmate 5520. I attached schematic.
          I have checked for short on caps and near to the ISL and no shorts.
          Also I see there are shorts on U5 and U6 Gate-Source. But this is not really a shorts. After 2,3 minutes no short there. I also replaced these 2 mosfets but the same. When I power up the laptop I check shorts there but after 2,3 minutes no short anymore. Mosfets are OK. Any idea?
          Attached Files

            Comment

            • MDY
              Senior Member
              • Jan 2014
              • 75
              • Spain
              #4
              Re: ISL 6264 problem. Laptop shutdown 1s less

              No idea? Should I replace the ISL? Can I check something more?

                Comment

                • Francisco.s
                  Badcaps Veteran
                  • Jan 2013
                  • 685
                  • Spain
                  #5
                  Re: ISL 6264 problem. Laptop shutdown 1s less

                  Originally posted by MDY
                  No idea? Should I replace the ISL? Can I check something more?
                  I removed r30 (resistor that separate VR_ON from ISL) VR_ON is maintained in 3.3V. So I discard it is VR_ON problem......
                  Have you checked current consumption from dc jack?

                    Comment

                    • MDY
                      Senior Member
                      • Jan 2014
                      • 75
                      • Spain
                      #6
                      Re: ISL 6264 problem. Laptop shutdown 1s less

                      Yes, power supply: 0A - 0.60A - 0A. It shutdown in less then 1s.

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