Dv6700 dead, only adopter light in on

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  • hispeck
    Badcaps Veteran
    • Aug 2015
    • 258
    • nigeria

    #1

    Dv6700 dead, only adopter light in on

    Hello, DV6700 , dead but when i plug the adopter the light come on only, i checked mosfet pq30 pin 5.6.7.8 19v pin 1.2.3. 0v pin 4 0v, but mosfet is ok
  • Techtiger
    Badcaps Legend
    • Oct 2014
    • 1601
    • france

    #2
    Re: Dv6700 dead, only adopter light in on

    Check PU1 pin 1.10 for Voltage ? PQ31 pin3 ?
    May be the Fet number is not correct upload the Schematic
    Last edited by Techtiger; 02-12-2019, 12:19 AM.

    Comment

    • hispeck
      Badcaps Veteran
      • Aug 2015
      • 258
      • nigeria

      #3
      Re: Dv6700 dead, only adopter light in on

      Ok, i will, thanks

      Comment

      • hispeck
        Badcaps Veteran
        • Aug 2015
        • 258
        • nigeria

        #4
        Re: Dv6700 dead, only adopter light in on

        Here is schematic, thanks for your help
        Attached Files

        Comment

        • ktmmotocross
          Boardkiller
          • Feb 2014
          • 3580
          • slovakia

          #5
          Re: Dv6700 dead, only adopter light in on

          u r senior member. u must know that u must start with measure charger ic pins

          but is it worth it? that nvidia NB was same shit like nvidia GPUs
          Last edited by ktmmotocross; 02-12-2019, 01:43 PM.

          Comment

          • Techtiger
            Badcaps Legend
            • Oct 2014
            • 1601
            • france

            #6
            Re: Dv6700 dead, only adopter light in on

            Originally posted by hispeck
            Here is schematic, thanks for your help
            test all this voltages
            Attached Files
            Last edited by Techtiger; 02-12-2019, 02:34 PM.

            Comment

            • hispeck
              Badcaps Veteran
              • Aug 2015
              • 258
              • nigeria

              #7
              Re: Dv6700 dead, only adopter light in on

              Originally posted by ktmmotocross
              u r senior member. u must know that u must start with measure charger ic pins

              but is it worth it? that nvidia NB was same shit like nvidia GPUs
              Hello, sorry i thought i said i tested the pq30 which i got only 19v on pin 5.6.7.8. pin 1.2.3. no output even pin 4

              Comment

              • ktmmotocross
                Boardkiller
                • Feb 2014
                • 3580
                • slovakia

                #8
                Re: Dv6700 dead, only adopter light in on

                Originally posted by hispeck
                Hello, sorry i thought i said i tested the pq30 which i got only 19v on pin 5.6.7.8. pin 1.2.3. no output even pin 4
                do u know what is charger ic?

                Comment

                • hispeck
                  Badcaps Veteran
                  • Aug 2015
                  • 258
                  • nigeria

                  #9
                  Re: Dv6700 dead, only adopter light in on

                  Originally posted by ktmmotocross
                  do u know what is charger ic?
                  yes, max8724 is the chargilng ic for this laptop, meanwhile on this board i found this components short ..[ pu8 TL331 ] and pq27 IMZ2, i dont have exact numbers , which one can i use as replacement ? IMZ2 is shoted all the legs

                  Comment

                  • hispeck
                    Badcaps Veteran
                    • Aug 2015
                    • 258
                    • nigeria

                    #10
                    Re: Dv6700 dead, only adopter light in on

                    Originally posted by techtiger
                    test all this voltages
                    i test pr133 one end is 17v and 0.05v same with PD22 17v and 0.05v

                    Comment

                    • Techtiger
                      Badcaps Legend
                      • Oct 2014
                      • 1601
                      • france

                      #11
                      Re: Dv6700 dead, only adopter light in on

                      PU8 is the Operational Amplifier remove PQ27 with out power test shot to GND all legs if still short you’re have 5 resistance & 3 caps to test in this circuit may be one of the caps bad

                      Comment

                      • Techtiger
                        Badcaps Legend
                        • Oct 2014
                        • 1601
                        • france

                        #12
                        Re: Dv6700 dead, only adopter light in on

                        Originally posted by hispeck
                        i test pr133 one end is 17v and 0.05v same with PD22 17v and 0.05v
                        Test PR133 May be its bad but the 17V is not enough to the Gate of PQ30

                        Comment

                        • hispeck
                          Badcaps Veteran
                          • Aug 2015
                          • 258
                          • nigeria

                          #13
                          Re: Dv6700 dead, only adopter light in on

                          Originally posted by techtiger
                          Test PR133 May be its bad but the 17V is not enough to the Gate of PQ30
                          So what should i do?

                          Comment

                          • hispeck
                            Badcaps Veteran
                            • Aug 2015
                            • 258
                            • nigeria

                            #14
                            Re: Dv6700 dead, only adopter light in on

                            Originally posted by techtiger
                            PU8 is the Operational Amplifier remove PQ27 with out power test shot to GND all legs if still short you're have 5 resistance & 3 caps to test in this circuit may be one of the caps bad
                            I already removed pq27 there was no short on board, when i tested outside circuits still shorting

                            Comment

                            • hispeck
                              Badcaps Veteran
                              • Aug 2015
                              • 258
                              • nigeria

                              #15
                              Re: Dv6700 dead, only adopter light in on

                              Originally posted by techtiger
                              Test PR133 May be its bad but the 17V is not enough to the Gate of PQ30
                              pr133 value is 100k, with my DM i get 99.89k

                              Comment

                              • Techtiger
                                Badcaps Legend
                                • Oct 2014
                                • 1601
                                • france

                                #16
                                Re: Dv6700 dead, only adopter light in on

                                Originally posted by hispeck
                                pr133 value is 100k, with my DM i get 99.89k
                                ok then the out put side is short that's why no out put for PQ30 pin 4 , test pc176 pr132 & PQ56 PR233(BATDIS G)
                                VH28 = 28V only 17V at this point
                                Last edited by Techtiger; 02-13-2019, 02:23 PM.

                                Comment

                                • Techtiger
                                  Badcaps Legend
                                  • Oct 2014
                                  • 1601
                                  • france

                                  #17
                                  Re: Dv6700 dead, only adopter light in on

                                  Originally posted by hispeck
                                  So what should i do?
                                  may be some one else can help i cannot find out in Schematic from where that 28V come in

                                  Comment

                                  • piernov
                                    Super Moderator
                                    • Jan 2016
                                    • 4435
                                    • France

                                    #18
                                    Re: Dv6700 dead, only adopter light in on

                                    I think it's this section that's acting as a charge pump.
                                    Not exactly sure how it works but I think the opamp circuitry around PU8 is an astable multivibrator and PQ27 is some sort of "buffer" to charge/discharge the capacitor PC88 and not affect the characteristics of the astable multivibrator.
                                    This just creates an oscillator for the charge pump (centered around PD12, the dual diode on top right, I cut the markings in the screenshot…) to work
                                    Attached Files
                                    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                                    Comment

                                    • Techtiger
                                      Badcaps Legend
                                      • Oct 2014
                                      • 1601
                                      • france

                                      #19
                                      Re: Dv6700 dead, only adopter light in on

                                      Originally posted by piernov
                                      I think it's this section that's acting as a charge pump.
                                      Not exactly sure how it works but I think the opamp circuitry around PU8 is an astable multivibrator and PQ27 is some sort of "buffer" to charge/discharge the capacitor PC88 and not affect the characteristics of the astable multivibrator.
                                      This just creates an oscillator for the charge pump (centered around PD12, the dual diode on top right, I cut the markings in the screenshot…) to work
                                      Thanks piernov for the explanation i thought PU8 was a Operational Amplifier.
                                      HISPECK the curcit you must get rid of the short
                                      Last edited by Techtiger; 02-14-2019, 11:20 PM.

                                      Comment

                                      • smali
                                        Badcaps Veteran
                                        • Sep 2014
                                        • 287
                                        • Pakistan

                                        #20
                                        Re: Dv6700 dead, only adopter light in on

                                        Remove PQ22 and then check pq30 gate (pin#4) voltage?
                                        And also check voltage on PD8 on both side..
                                        Last edited by smali; 02-15-2019, 02:01 AM.

                                        Comment

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