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    Acer Aspire D270 dead

    Any one here have a schematic diagram for this Model? i found a open picofuse but still no power or anything. any suggestion where to check.. i'm newbie in laptop repair. thanks in advance..

    #2
    Re: Acer Aspire D270 dead

    kabayan,

    check this out...
    Attached Files

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      #3
      Re: Acer Aspire D270 dead

      Originally posted by fddizon View Post
      kabayan,

      check this out...
      thnks sir fddizon.. pagpalain ka kabayan

      Comment


        #4
        Re: Acer Aspire D270 dead

        usually if no 19v what item is failed? mosfet or caps? and if no 3.3v what component failed then how about no 5v on motherboard?

        Comment


          #5
          Re: Acer Aspire D270 dead

          Originally posted by sasser View Post
          usually if no 19v what item is failed? mosfet or caps? and if no 3.3v what component failed then how about no 5v on motherboard?
          if there is no 5v but have 3.3v, check output upper and lower fets and gate signals of these fets. if no signal on gate replace regulator

          Comment


            #6
            Re: Acer Aspire D270 dead

            Sir dizon, if UGATE is 0.2V of ISL88731C, so no gate input to AON7410.. It is considered as defective? There's a 19V in CSSN of ISL88731C..

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              #7
              Re: Acer Aspire D270 dead

              Check if it turn on with battery . I got two of this model and it only power on with charged baterry . Solved issue by reflowing special area on the board(not the chipset).

              Comment


                #8
                Re: Acer Aspire D270 dead

                what do you mean with "speacial area" ?

                Comment


                  #9
                  Re: Acer Aspire D270 dead

                  Originally posted by spidey View Post
                  what do you mean with "speacial area" ?
                  My opinion, "special area" is a secret area that only she knew it, and did not want to share with us

                  Comment


                    #10
                    Re: Acer Aspire D270 dead

                    I replaced the ISL88731C and there's a output now.. but another problem occurred.. there's no 5V and 3V output in voltage controller IC RT8223M.. there's no supply to the gate of MOSFETs.. VIN of RT8223M is 3.3V.. any idea? thnks in advance..

                    Comment


                      #11
                      Re: Acer Aspire D270 dead

                      hi spidey . the special area is just around rt8223.

                      Comment


                        #12
                        Re: Acer Aspire D270 dead

                        corell check pr190 resistor

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                          #13
                          Re: Acer Aspire D270 dead

                          Originally posted by dycc View Post
                          corell check pr190 resistor
                          thnks for the reply..I already checked that sir.. 19V input of PR190.. output is 3.3V to VIN of RT8233M.. i checked the PR190 its 114 ohms.. labeled at 100 ohms.. it is ok? 19V became 3.3V after the PR190?

                          Comment


                            #14
                            Re: Acer Aspire D270 dead

                            pr190=10ohms not 100ohms

                            ij you find 114ohms so it's dead

                            Comment


                              #15
                              Re: Acer Aspire D270 dead

                              100= 10 * 10^0 = 10 *1 =10 ohms

                              Comment


                                #16
                                Re: Acer Aspire D270 dead

                                Originally posted by dycc View Post
                                pr190=10ohms not 100ohms

                                ij you find 114ohms so it's dead
                                thanks for the clarification sir..

                                Comment


                                  #17
                                  Re: Acer Aspire D270 dead

                                  after replacing the PR190, still no 3V and 5V output from RT8223M.. any idea? is RT8223M is defective? thnks in advance.

                                  Comment


                                    #18
                                    Re: Acer Aspire D270 dead

                                    Please post the voltage reading of all pins of PU3 - RT8223m

                                    Comment


                                      #19
                                      Re: Acer Aspire D270 dead

                                      Originally posted by whaldsz View Post
                                      Please post the voltage reading of all pins of PU3 - RT8223m
                                      i'll pose later.. thnks sir..

                                      Comment


                                        #20
                                        Re: Acer Aspire D270 dead

                                        Originally posted by whaldsz View Post
                                        Please post the voltage reading of all pins of PU3 - RT8223m

                                        pin 13 - 6.21V
                                        pin 16 - 19.14V
                                        all remaining pin - 0V

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