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acer aspire V3 771G VA70

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    acer aspire V3 771G VA70

    hello everyone, this acer with battery turns on normally, so also with battery and power supply you turn on and charge the battery, but with only the power supply does not turn on, turn on a second all the LEDs, it is normal to turn on only with battery insert? usually they light up even without

    #2
    Re: acer aspire V3 771G VA70

    its not usual. Should turn on with only adapter. Check DC-in mosfet.

    Comment


      #3
      Re: acer aspire V3 771G VA70

      Using a known good AC adapter with correct power rating?
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

      Comment


        #4
        Re: acer aspire V3 771G VA70

        Originally posted by piernov View Post
        Using a known good AC adapter with correct power rating?
        the power supply is of the correct power

        Comment


          #5
          Re: acer aspire V3 771G VA70

          Originally posted by piernov View Post
          Using a known good AC adapter with correct power rating?
          unfortunately on the card I cannot identify mosfets because the name is not printed

          Comment


            #6
            Re: acer aspire V3 771G VA70

            Originally posted by poweron View Post
            unfortunately on the card I cannot identify mosfets because the name is not printed
            Bottom side of DC connector 2 Fets Caps & CLR test the Gate Voltage of 2 fets
            Gate Voltage must be high than DRAIN
            Attached Files
            Last edited by Techtiger; 07-02-2019, 03:04 AM.

            Comment


              #7
              Re: acer aspire V3 771G VA70

              Originally posted by techtiger View Post

              Bottom side of DC connector 2 Fets Caps & CLR test the Gate Voltage of 2 fets
              Gate Voltage must be high than DRAIN
              these are the voltages present by connecting the ac connector, without having yet pressed the button power
              Attached Files

              Comment


                #8
                Re: acer aspire V3 771G VA70

                thats good now test all pins of BQ24725 for voltage and AC_IN_OC pin 120 of U3001
                voltage L8100 L8101
                voltage U8100A pin 3 13 7
                Last edited by Techtiger; 07-02-2019, 09:59 AM.

                Comment


                  #9
                  Re: acer aspire V3 771G VA70

                  Originally posted by techtiger View Post
                  thats good now test all pins of BQ24725 for voltage and AC_IN_OC pin 120 of U3001
                  voltage L8100 L8101
                  voltage U8100A pin 3 13 7
                  you have a boardview of this project otherwise I can't find all the components on the card, thank you very much

                  Comment


                    #10
                    Re: acer aspire V3 771G VA70

                    Here is the boardview
                    Attached Files

                    Comment


                      #11
                      Re: acer aspire V3 771G VA70

                      Originally posted by mcplslg123 View Post
                      Here is the boardview
                      I opened the file but it does not match my sheet: VA70 / VG70 Rev: 2.1

                      this is the right one
                      Attached Files
                      Last edited by poweron; 07-03-2019, 02:29 AM.

                      Comment


                        #12
                        Re: acer aspire V3 771G VA70

                        Originally posted by poweron View Post
                        I opened the file but it does not match my sheet: VA70 / VG70 Rev: 2.1

                        this is the right one
                        bottom side of the Boardview you have U3001 SIO chip it is matching, mcplslg123 have send

                        Comment


                          #13
                          Re: acer aspire V3 771G VA70

                          Originally posted by techtiger View Post
                          bottom side of the Boardview you have U3001 SIO chip it is matching, mcplslg123 have send
                          the board posted by mcplslg123 is this bottom side
                          Attached Files
                          Last edited by poweron; 07-03-2019, 03:08 PM.

                          Comment


                            #14
                            Re: acer aspire V3 771G VA70

                            and this is the top side
                            Attached Files

                            Comment


                              #15
                              Re: acer aspire V3 771G VA70

                              the one on my card is this top side, as you can see it's different, I found it on the net but I can't download it
                              Attached Files

                              Comment


                                #16
                                Re: acer aspire V3 771G VA70

                                as long as kbc is same in both versions of boardview, where is the issue. You can simply findout the pins to be tested and proceed further.

                                Comment


                                  #17
                                  Re: acer aspire V3 771G VA70

                                  these are the voltages on U8800 BQ24725:
                                  pin 1 = 19v
                                  pin 2 = 19v
                                  pin 3 = 19v
                                  pin 4 = 25v
                                  pin 5 = 3.2v
                                  pin 6 = 2.6v
                                  pin 7 = 0v
                                  pin 8 = 3.2v
                                  pin 9 = 3.2v
                                  pin 10 = 3.0v
                                  pin 11 = 3.2v
                                  pin 12 = 3.2v
                                  pin 13 = 3.2v
                                  pin 14 = gnd
                                  pin 15 = 0v
                                  pin 16 = 5.9v
                                  pin 17 = 5.9v
                                  pin 18 = 3.2v
                                  pin 19 = 3.2v
                                  pin 20 = 19v
                                  on pin 20 of the kbc U3001 I measure 3.2v AC_IN_OC

                                  Comment


                                    #18
                                    Re: acer aspire V3 771G VA70

                                    Originally posted by poweron View Post
                                    these are the voltages on U8800 BQ24725:
                                    pin 1 = 19v
                                    pin 2 = 19v
                                    pin 3 = 19v
                                    pin 4 = 25v
                                    pin 5 = 3.2v
                                    pin 6 = 2.6v
                                    pin 7 = 0v
                                    pin 8 = 3.2v
                                    pin 9 = 3.2v
                                    pin 10 = 3.0v
                                    pin 11 = 3.2v
                                    pin 12 = 3.2v
                                    pin 13 = 3.2v
                                    pin 14 = gnd
                                    pin 15 = 0v
                                    pin 16 = 5.9v
                                    pin 17 = 5.9v
                                    pin 18 = 3.2v
                                    pin 19 = 3.2v
                                    pin 20 = 19v
                                    on pin 20 of the kbc U3001 I measure 3.2v AC_IN_OC
                                    Well as for the voltage's seems to be correct, these measurements taken with out battery inserted ?

                                    Comment


                                      #19
                                      Re: acer aspire V3 771G VA70

                                      Originally posted by techtiger View Post
                                      Well as for the voltage's seems to be correct, these measurements taken with out battery inserted ?
                                      exact, only adapter

                                      Comment


                                        #20
                                        Re: acer aspire V3 771G VA70

                                        here you are for the boardview
                                        Attached Files

                                        Comment

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