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dell n5110 no charger detect

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    #21
    Re: dell n5110 no charger detect

    shall i update the bios ?????

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      #22
      Re: dell n5110 no charger detect

      Originally posted by abbas_govani View Post
      hi sir
      there is no Confusing
      laptop is not charging the battery that is the problem
      What confused me was that 2.8V from DC jack...
      I thought it's shorted, either the board,jack or something in charger circuit...
      Also thought that you tested laptop with battery & charger connected at the same time...
      Anyway...

      Could you check resistance @ PL4001 & post all voltages of PU4001?

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        #23
        Re: dell n5110 no charger detect

        what should be the current on pq4001 pin 4 and 5 no current

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          #24
          Re: dell n5110 no charger detect

          Originally posted by abbas_govani View Post
          what should be the current on pq4001 pin 4 and 5 no current
          I'm not 100% sure, but in this design the pq4001 is a kind of charging switch...
          It will push voltage to PU4002 gate if there's something wrong(or if it's not getting PWR_CHG_ACOK)...
          PU4002 is P channel, so it will switch off when gate voltage is similar to S & G voltage...Maybe I'm talking shit, but it does make sense, therefore these 2 should be OK...
          Last edited by loser18; 05-26-2014, 11:18 AM.

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            #25
            Re: dell n5110 no charger detect

            I would move the attention to PU4001...
            There are many of pwrchrg voltages in this regulator...

            Ok...

            Digged a little bit in datasheet...
            This regulator is also Enabling & Disabling charging...

            First you need to check:

            -PIN7
            -PIN2
            -COMPARE PIN 22 & PIN 15
            -PIN21
            -PIN3
            Last edited by loser18; 05-26-2014, 11:33 AM.

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              #26
              Re: dell n5110 no charger detect

              610 ohm @ pl4001 and pu4001

              1 19v
              2 2.6
              3 2.6
              4 5.8
              5 6
              6 0
              7 0
              8 2.5
              9 2.5
              10 0
              11 1.1
              12 3.3
              13 3.3
              14 0
              15 2.5
              16 0
              17 0
              18 0
              19 19
              20 19

              Comment


                #27
                Re: dell n5110 no charger detect

                Originally posted by loser18 View Post
                I would move the attention to PU4001...
                There are many of pwrchrg voltages in this regulator...

                Ok...

                Digged a little bit in datasheet...
                This regulator is also Enabling & Disabling charging...

                First you need to check:

                -PIN7
                -PIN2
                -COMPARE PIN 22 & PIN 15
                -PIN21
                -PIN3

                sir pu4001 is 20 pin ic

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                  #28
                  Re: dell n5110 no charger detect

                  pu4001
                  Attached Files

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                    #29
                    Re: dell n5110 no charger detect

                    Are you sure you've checked the right IC???
                    According to schematics it should be BQ24745...

                    Comment


                      #30
                      Re: dell n5110 no charger detect

                      Think the schematic is not right...
                      What's the mobo part number?

                      Comment


                        #31
                        Re: dell n5110 no charger detect

                        10245-2
                        48.4ie01.021
                        dq15 intel mb

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                          #32
                          Re: dell n5110 no charger detect

                          And what's the PU4001 number?

                          Comment


                            #33
                            Re: dell n5110 no charger detect

                            Attached Files

                            Comment


                              #34
                              Re: dell n5110 no charger detect

                              cant read properly its like bq....

                              Comment


                                #35
                                Re: dell n5110 no charger detect

                                I've found 48.4ie01.021 schematics, but's an AMD...

                                Comment


                                  #36
                                  Re: dell n5110 no charger detect

                                  cant read properly its like bq074ti..

                                  Comment


                                    #37
                                    Re: dell n5110 no charger detect

                                    sorry it is bq07a

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                                      #38
                                      Re: dell n5110 no charger detect

                                      bq07a pin current

                                      1 19v
                                      2 19
                                      3 0
                                      4 0
                                      5 0
                                      6 2.5
                                      7 0
                                      8 3.3
                                      9 3.3
                                      10 1.1
                                      11 0
                                      12 2.5
                                      13 2.5
                                      14 0
                                      15 0
                                      16 6
                                      17 5.8
                                      18 2.6
                                      19 2.6
                                      20 19

                                      Comment


                                        #39
                                        Re: dell n5110 no charger detect

                                        Why are the voltages different now???
                                        It's BQ24707A...
                                        Leave it on charger for 2 minutes & I think you'll get the same voltages as in your 1st post...
                                        I think it's in Over Current Protection and therefore charging is disabled...
                                        Last edited by loser18; 05-26-2014, 01:12 PM.

                                        Comment


                                          #40
                                          Re: dell n5110 no charger detect

                                          The IC cannot maintain the input current level if the charge current has been already reduced to zero. After the
                                          system current continues increasing to the 1.66X of input current DAC set point (with 2.5ms blank out time),
                                          IFAULT is pulled to low and the charge is disabled for 1.3s and will soft start again for charge if ACOC condition
                                          goes away. If such failure is detected seven times in 90 seconds, charge will be latched off and an adapter
                                          removal and system shut down (make ACDET < 0.6V to reset IC) is required to start charge again. After 90
                                          seconds, the failure counter will be reset to zero to prevent latch off.

                                          Think the IC is dead / shorted...Or some cap around shorted...
                                          It's a hardcore case without schematics...
                                          Last edited by loser18; 05-26-2014, 12:51 PM.

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