Dell E207WFPc

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  • PlainBill
    Badcaps Legend
    • Feb 2009
    • 7034
    • USA

    #61
    Re: Dell E207WFPc

    Originally posted by killian6pk
    I understand. Hope these pics will help.
    I've marked three devices. The first two (upper left and mid-left) are probably voltage regulators. Using one of the mounting holes as a ground point, what are the voltages on each pin? And what is the part number of the one without a thermal pad?

    The one on the right may be the key to the problem. What is the identifier on that IC?

    PlainBill
    Attached Files
    For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

    Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

    Comment

    • killian6pk
      Badcaps Veteran
      • Apr 2010
      • 502
      • USA

      #62
      Re: Dell E207WFPc

      Readings. On Ac V

      Regulator with Thermo Pad (Upper Left)
      Pin 1 = 46.6v
      Pin 2 = 46.7v
      Pin 3 = 46.7v

      Middle Left Regulator
      Lettering on part: AZ1117D
      1.8E1
      70IN19
      Pin 1 = 46.7v
      Pin 2 = 46.7v
      Pin 3 = 46.6v

      Small Part on right
      Lettering on part: 6910P First number could also be an 8

      Pin 1 = 47.7v
      Pin 2 = 46.6v

      Data Sheet for AZ1117D: http://www.datasheetarchive.com/AZ11...datasheet.html
      Last edited by killian6pk; 12-04-2011, 11:42 AM. Reason: correction
      Have you ever stopped to think and then forget to start thinking again?

      As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

      Comment

      • alexanna
        Member
        • Mar 2010
        • 1346

        #63
        Re: Dell E207WFPc

        Originally posted by killian6pk
        Readings. On Ac V


        Measure DC voltage
        Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!

        Comment

        • killian6pk
          Badcaps Veteran
          • Apr 2010
          • 502
          • USA

          #64
          Re: Dell E207WFPc

          I tried DC to start with and the readings had a minus sign and bounced all over the place so that I could not get a fix on the number. I will try it again.
          Have you ever stopped to think and then forget to start thinking again?

          As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

          Comment

          • killian6pk
            Badcaps Veteran
            • Apr 2010
            • 502
            • USA

            #65
            Re: Dell E207WFPc

            I was able to get readings this time by moving my black probe to a ground screw hole on the power board instead of on the video board. The numbers still jumped around a good bit but finally settled down so that I could get a reading.

            Regulator with Thermo Pad
            Pin 1 = 339.6mv
            Pin 2 = 335.1mv
            Pin 3 = 336.6mv

            Middle Left Regulator
            Pin 1 = 334.8mv
            Pin 2 = 336.2mv
            Pin 3 = 335.8mv

            Small IC on Right
            Pin 1 = 336.4mv
            Pin 2 = 336.4mv
            Have you ever stopped to think and then forget to start thinking again?

            As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

            Comment

            • killian6pk
              Badcaps Veteran
              • Apr 2010
              • 502
              • USA

              #66
              Re: Dell E207WFPc

              Just to clarify the numbers above were on the DC scale.
              Have you ever stopped to think and then forget to start thinking again?

              As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

              Comment

              • alexanna
                Member
                • Mar 2010
                • 1346

                #67
                Re: Dell E207WFPc

                Originally posted by killian6pk
                Just to clarify the numbers above were on the DC scale.
                Verify you are still getting 5 volts on pins 7 and 8 on the power supply, and then use the same ground to measure the regulators.
                Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!

                Comment

                • killian6pk
                  Badcaps Veteran
                  • Apr 2010
                  • 502
                  • USA

                  #68
                  Re: Dell E207WFPc

                  When I measured again just now I got 333.8mv on both pin 7 & 8. I checked the fuse and it is still 0.1ohm. What should I do now?
                  Have you ever stopped to think and then forget to start thinking again?

                  As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                  Comment

                  • retiredcaps
                    Badcaps Legend
                    • Apr 2010
                    • 9271

                    #69
                    Re: Dell E207WFPc

                    Originally posted by killian6pk
                    When I measured again just now I got 333.8mv on both pin 7 & 8.
                    Something has changed. 5V was present and the voltage regulators were all fine back on page 1 of this thread.
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                    Comment

                    • killian6pk
                      Badcaps Veteran
                      • Apr 2010
                      • 502
                      • USA

                      #70
                      Re: Dell E207WFPc

                      Yes, but the only thing I have done is check readings with the power on and the power board and main board connected. I don't know what could have changed unless connecting to power burned something else out. That's why I checked the fuse. I don't know where to go from here.
                      Have you ever stopped to think and then forget to start thinking again?

                      As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                      Comment

                      • alexanna
                        Member
                        • Mar 2010
                        • 1346

                        #71
                        Re: Dell E207WFPc

                        Are the boards screwed down to the metal chasis,or they Laying loose
                        Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!

                        Comment

                        • killian6pk
                          Badcaps Veteran
                          • Apr 2010
                          • 502
                          • USA

                          #72
                          Re: Dell E207WFPc

                          They are loose on my workbench. If I screw them down into the metal housing they are upside down and I can't get at the front side of the boards.
                          Have you ever stopped to think and then forget to start thinking again?

                          As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                          Comment

                          • alexanna
                            Member
                            • Mar 2010
                            • 1346

                            #73
                            Re: Dell E207WFPc

                            I suspect you do not have a proper ground for your DVM.
                            There should be a wire in the conector from the P/S to the siginal crad that is ground.
                            See if you can locate it and use that for the negitive lead on the DVM.
                            Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!

                            Comment

                            • killian6pk
                              Badcaps Veteran
                              • Apr 2010
                              • 502
                              • USA

                              #74
                              Re: Dell E207WFPc

                              I will try that.
                              Have you ever stopped to think and then forget to start thinking again?

                              As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                              Comment

                              • killian6pk
                                Badcaps Veteran
                                • Apr 2010
                                • 502
                                • USA

                                #75
                                Re: Dell E207WFPc

                                Using the ground wire like you said. The two 5v pins show 5.07v. The 3 places that Bill wanted me to check are as follows:

                                The regulator with the foam on top:
                                Pin 1 = 0.9mv
                                Pin 2 = 3.295v
                                Pin 3 = 5.07v

                                Regulator on Middle Left of board:
                                Pin 1 = 0.9mv
                                Pin 2 = 1.799v
                                Pin 3 = 3.294v

                                Small IC on Right Side:
                                Pin 1 = 0.9mv
                                Pin 2 = 3.033v
                                Last edited by killian6pk; 12-05-2011, 04:39 PM.
                                Have you ever stopped to think and then forget to start thinking again?

                                As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                                Comment

                                • alexanna
                                  Member
                                  • Mar 2010
                                  • 1346

                                  #76
                                  Re: Dell E207WFPc

                                  Originally posted by killian6pk
                                  Using the ground wire like you said. The two 5v pins show 5.07v. The 3 places that Bill wanted me to check are as follows:

                                  The regulator with the foam on top:
                                  Pin 1 = 0.9mv
                                  Pin 2 = 3.295v
                                  Pin 3 = 5.07v

                                  Regulator on Middle Left of board:
                                  Pin 1 = 0.9mv
                                  Pin 2 = 1.799v
                                  Pin 3 = 3.294v

                                  Small IC on Right Side:
                                  Pin 1 = 0.9mv
                                  Pin 2 = 3.033v
                                  Good, the voltage regulators look OK
                                  Hopefully PlainBill will continue with his thoughts.
                                  Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!

                                  Comment

                                  • killian6pk
                                    Badcaps Veteran
                                    • Apr 2010
                                    • 502
                                    • USA

                                    #77
                                    Re: Dell E207WFPc

                                    Thanks for the suggestion on the grounding.
                                    Have you ever stopped to think and then forget to start thinking again?

                                    As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                                    Comment

                                    • PlainBill
                                      Badcaps Legend
                                      • Feb 2009
                                      • 7034
                                      • USA

                                      #78
                                      Re: Dell E207WFPc

                                      I was hoping that the small IC was a reset controller, but the part number seems to indicate otherwise, and the polarity of the signal is wrong. Whoops!!! The IC I was indicating has THREE leads. Recheck, please.

                                      PlainBill
                                      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                                      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                                      Comment

                                      • killian6pk
                                        Badcaps Veteran
                                        • Apr 2010
                                        • 502
                                        • USA

                                        #79
                                        Re: Dell E207WFPc

                                        That was my fault I checked the proper chip, but forgot to check the top soldered tab. I go check that now.
                                        Have you ever stopped to think and then forget to start thinking again?

                                        As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                                        Comment

                                        • killian6pk
                                          Badcaps Veteran
                                          • Apr 2010
                                          • 502
                                          • USA

                                          #80
                                          Re: Dell E207WFPc

                                          Here are the readings on the small chip on the right.
                                          Pin 1 = 0.8mv
                                          Pin 2 = 3.033v
                                          Pin 3 = 5.07v

                                          Hope this helps.
                                          Have you ever stopped to think and then forget to start thinking again?

                                          As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                                          Comment

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