Dell 3542 getting 4.5v on LDO

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  • qayyum786
    Badcaps Legend
    • Aug 2018
    • 1933
    • INDIA
    #1

    Dell 3542 getting 4.5v on LDO

    i got a case Dell 3542 which is i am getting 4.5v instead of 3.3v on On/off switch/ psl logic/on rtc as well
    on all LDO 3.3v i am getting 4.5v

    when i remove R2402 IO VCC 2.2 ohm resistor ALL LDO 3.3V become ok every where

    work done
    change PU4503 3 & 5 volt ic
    change near by ic resistors
    change psl fet
    change rtc diod
    change usb ic

    any one else face this same issue
    and what else i have to check ?????
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    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      Re: Dell 3542 getting 4.5v on LDO

      Try changing the cap of PL4501/4502 but i still beleive its something wrong in either PSL/RTC section.

        Comment

        • qayyum786
          Badcaps Legend
          • Aug 2018
          • 1933
          • INDIA
          #3
          Re: Dell 3542 getting 4.5v on LDO

          shell i change the io now ?

            Comment

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