DAOR75MB6CO REV:C Model: R75

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  • goodguy91
    Senior Member
    • Aug 2015
    • 80
    • Finland

    #1

    DAOR75MB6CO REV:C Model: R75

    Anyone have schematics and boardview for this?

    DAOR75MB6CO REV:C Model: R75 EC: ITE8528E

    water dmg, No power, dc jack light flashes very quick 0.1second orange when plugged , only 1.5v to bios chip, 1.5v to power button, 1v-1.5v to battery pins. Tried already:

    -check for shorts
    -removed from board and check mosfets pq28 pq29 pq40 pq42 pq41 pq39 pq9 pq8 pq18 all ok
  • goodguy91
    Senior Member
    • Aug 2015
    • 80
    • Finland

    #2
    Re: DAOR75MB6CO REV:C Model: R75

    found schematic , still problems.. ec it8528 getting 0v on pin 26 (vcc) what should i measure?
    Attached Files

    Comment

    • goodguy91
      Senior Member
      • Aug 2015
      • 80
      • Finland

      #3
      Re: DAOR75MB6CO REV:C Model: R75

      found chargr ic bq24728 (marking on chip bq728) defective, do i need new replacement ic or are there other compatible for this one?

      Comment

      • TossDon
        AKA Masood
        • Jun 2013
        • 26
        • USA

        #4
        Re: DAOR75MB6CO REV:C Model: R75

        Post some pictures of water damaged location and before you proceed replacing components, clean up the board thoroughly(with warm water and dish soap), let it dry well and identify or isolate all the shorts as much as you can; if you don't, any replaced parts will fry. Post your progress.
        Good luck

        Comment

        • goodguy91
          Senior Member
          • Aug 2015
          • 80
          • Finland

          #5
          Re: DAOR75MB6CO REV:C Model: R75

          sadly previous owner already clean it with alcohol so there was no visible signs of liquid damage on the board when i got it, i also ultrasonic it afterwards.

          Didnt find any shorts from charger IC pads after i lift it but it gave no voltage to anywhere, only had vcc 19.5v

          Comment

          • menshawy
            Badcaps Veteran
            • Aug 2013
            • 400
            • egypt

            #6
            Re: DAOR75MB6CO REV:C Model: R75

            thanks

            Comment

            • mirandowebs
              Member
              • Oct 2010
              • 13

              #7
              Re: DAOR75MB6CO REV:C Model: R75

              Thanks!

              Comment

              • islammostafa.me19
                Member
                • Jul 2017
                • 39
                • egypt

                #8
                Re: DAOR75MB6CO REV:C Model: R75

                good man thank you

                Comment

                • luisfm2
                  Senior Member
                  • Jan 2015
                  • 51
                  • Portugal

                  #9
                  Re: DAOR75MB6CO REV:C Model: R75

                  Thanks for schamatic.

                  Comment

                  • Aziz aj
                    Member
                    • Dec 2021
                    • 25
                    • Bangladesh

                    #10
                    my board problem is black screen kb output ok display volt 19v present other volt missing i am cannot find lvds ic give me location thic ic

                    Comment

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