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lenovo b470 turns on only on battery

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    #21
    Re: lenovo b470 turns on only on battery

    ok i try to removed pq4002

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      #22
      Re: lenovo b470 turns on only on battery

      removed pq4002 plugged both charger and battery pin 7 have voltage of 3.3v

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        #23
        Re: lenovo b470 turns on only on battery

        Any news ?

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          #24
          Re: lenovo b470 turns on only on battery

          Ok good put it back PQ4002
          And TELL ME WHAT VOLTAGES YOU ARE GETTING ON

          PU4001
          DRAIN = ?
          GATE = ?
          SOURCE = ?
          AFTER PLUG IN CHARGER

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            #25
            Re: lenovo b470 turns on only on battery

            If you will reply like this than it will take 2 days to fix it

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              #26
              Re: lenovo b470 turns on only on battery

              sorry for the late response on the pu4001 SOURCE have 19v and GATE=19 but DRAIN=0V no voltages on the drain with charger only plugged in
              Last edited by String2016; 05-21-2020, 03:52 AM.

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                #27
                Re: lenovo b470 turns on only on battery

                Do you have WhatsApp

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                  #28
                  Re: lenovo b470 turns on only on battery

                  Check pq4001 pin no:- 5 = ?

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                    #29
                    Re: lenovo b470 turns on only on battery

                    .
                    Last edited by qayyum786; 05-21-2020, 04:26 AM.

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                      #30
                      Re: lenovo b470 turns on only on battery

                      pq4001 pin 5 have 3.3v sorry i dont have whatsapp number

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                        #31
                        Re: lenovo b470 turns on only on battery

                        Ok
                        Check RASISTOR VALUE
                        PR4002
                        PR4003

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                          #32
                          Re: lenovo b470 turns on only on battery

                          Stay in touch continue till we fix this issue

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                            #33
                            Re: lenovo b470 turns on only on battery

                            pr4002 = 100kohms pr4003= 49.58kohms

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                              #34
                              Re: lenovo b470 turns on only on battery

                              Remove PQ4001and make jumper from pin 3 to pin 4

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                                #35
                                Re: lenovo b470 turns on only on battery

                                Any good news

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                                  #36
                                  Re: lenovo b470 turns on only on battery

                                  ok thanks ill update later

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                                    #37
                                    Re: lenovo b470 turns on only on battery

                                    Ok
                                    Last edited by qayyum786; 05-21-2020, 05:24 AM.

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                                      #38
                                      Re: lenovo b470 turns on only on battery

                                      update: @gayyum786 my mistakes of measurements here is the correct measurements on pq4001 6pin chip pin 1=19v pin2=3.3v pin 3 to pin6 both 0v

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                                        #39
                                        Re: lenovo b470 turns on only on battery

                                        Give ne value of pr4001 rasistor

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                                          #40
                                          Re: lenovo b470 turns on only on battery

                                          How come pin 1 is connected to the GROUND
                                          i think you are masure from pin 6

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