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acer aspire 4752 JE40 HR MB 10267-4 no power

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    acer aspire 4752 JE40 HR MB 10267-4 no power

    hi guys

    just want to know what you thinkk about this and if a replacement is needed
    thanks in advance

    its an acer 4752 no power liquid spilled

    3.3v/5v power ic
    rt8223mgqw-gp-u1
    pin
    1=1.17v
    2=0.02
    3=1.98
    4=1.98
    5=1.26
    6=1.26
    7=0.28
    8=3.37
    9=4..6
    10=0.28
    11=0.28
    12=0.0
    13=2.71
    14=3.38
    15=0.0
    16=19.31
    17=5.01
    18=3.35
    19=0.0
    20=0.06
    21=0.06
    22=4.59
    23=3.32
    24=0.06

    attached is the picture of the ic
    and schematics

    thanks
    Attached Files

    #2
    Re: acer aspire 4752 JE40 HR MB 10267-4 no power

    check voltage on power switch and battery tarmenal

    Comment


      #3
      Re: acer aspire 4752 JE40 HR MB 10267-4 no power

      looks like the chip has 3.3v_aux on pin 8 and 5v_aux on pin 17
      and you have on pin 18: 3.35v for enable
      but no 3.3v_pwr and 5v_pwr output

      so you need to replace the chip if you don't have any external shorts

      Comment


        #4
        Re: acer aspire 4752 JE40 HR MB 10267-4 no power

        Originally posted by sorinac View Post
        looks like the chip has 3.3v_aux on pin 8 and 5v_aux on pin 17
        and you have on pin 18: 3.35v for enable
        but no 3.3v_pwr and 5v_pwr output

        so you need to replace the chip if you don't have any external shorts
        on what pins?
        the right side!


        Pins 7 and 24?
        Just cook it! It's already broken.

        Comment


          #5
          Re: acer aspire 4752 JE40 HR MB 10267-4 no power

          3.3v_pwr should be on pin 7 and 11
          5v_pwr should be on pin 20 and 24
          also both images sides are identic except that enc pin 18
          here is the schematic without password .
          Attached Files
          Last edited by sorinac; 02-20-2014, 03:24 AM.

          Comment


            #6
            Re: acer aspire 4752 JE40 HR MB 10267-4 no power

            check all pins on 3 or 4 you get 3v and also check voltages on bios chip

            Comment


              #7
              Re: acer aspire 4752 JE40 HR MB 10267-4 no power

              Originally posted by alihomee View Post
              check all pins on 3 or 4 you get 3v and also check voltages on bios chip
              both 3 and 4 pins are connected to vref which is generated internal in rt8223b
              and is 2v (check the datasheet) also he can't have voltage on bios because 3d3v_pwr on pin 7 must be ok.


              crazypepe try new chip rt8223b
              Attached Files

              Comment


                #8
                Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                You need to replace this chip.

                Comment


                  #9
                  Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                  have problem to with 4752 ..
                  power on normal with battery ..without battery is no response power on
                  charging can only do in windows (laptop already on with batt)
                  charging in non power on laptop, charge led on then off,power button press nothing happen, remove charger, remove batt, install batt ..power on normaly
                  could be thic power ic broke?

                  Comment


                    #10
                    Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                    for me to be fast in trouble shooting replace the power ic then check again....
                    the voltage....

                    Comment


                      #11
                      Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                      nyimax

                      Comment


                        #12
                        Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                        is it same 10267-1 and 10267-4 ?

                        Comment


                          #13
                          Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                          nyimak aku

                          Comment


                            #14
                            Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                            Originally posted by gamel Expert77 View Post
                            nyimak aku
                            apanya sing di simak.. hehe

                            Comment


                              #15
                              Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                              RT8223A is compatible with TPS 51125A which is more common, try replacing it

                              Comment


                                #16
                                Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                                i have the same model of unit but my problem is that the mobo cant detect hdd and odd.,i check the power supply for the hdd and i read it only 3v..,can someone help me on this problem..

                                Comment


                                  #17
                                  Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                                  Pin 8 and pin 17 are 3.3v& 5v VEGR check

                                  Comment


                                    #18
                                    Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                                    thank u

                                    Comment


                                      #19
                                      Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                                      change ptc4102,ptc4101 it willbe work

                                      Comment


                                        #20
                                        Re: acer aspire 4752 JE40 HR MB 10267-4 no power

                                        Originally posted by Zazaku View Post
                                        apanya sing di simak.. hehe

                                        Comment

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