Dell E198FPB with bad caps

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #1

    Dell E198FPB with bad caps

    Since I did not see any thread on this model, I just fixed one today so I decided to post it for FYI.
    Attached Files
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809
  • jetadm123
    Badcaps Legend
    • Feb 2010
    • 2169

    #2
    Re: Dell E198FPB with bad caps

    I take it that bad caps were the only problem? And what are the PWM controller and inverter transformer switching transistor part numbers?

    Comment

    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA

      #3
      Re: Dell E198FPB with bad caps

      Just bad caps, the Inverter IC p/n did not come out in the pictures.
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: Dell E198FPB with bad caps

        Another monitor saved from landfill. Good work.

        More failed Elite capacitors... Second only to CapXon in terms of failures.
        Last edited by tom66; 05-20-2012, 06:06 PM.
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • ek2oo2
          Member
          • Oct 2013
          • 24
          • Philippines

          #5
          Re: Dell E198FPB with bad caps

          i got the same model and board with No Power, no standby LED.

          No irregularities during ocular inspection (no bad caps), upon voltage check I found only voltages around the BIG cap around 250v up to the Drain side of the BIG Mosfet.

          Could it be the 1203 8-pin PWM IC that won't start?

          I believe it has an internal start-up circuit.

          Help would be much appreciated...

          Eugene

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: Dell E198FPB with bad caps

            Check the bog resistor connected to the Source pin of the power MOSFET, and also check the small start-up cap (22~47uf 50V) close to the power MOSFET, try heating the caps with hair dryer.
            Check the secondary rectifier diodes, transistors/MOSFET in the inverter circuits section for shorts. It could be that the power supply is in the shutdown mode due to shorted circuits.
            Never stop learning
            Basic LCD TV and Monitor troubleshooting guides.
            http://www.badcaps.net/forum/showthr...956#post305956

            Voltage Regulator (LDO) testing:
            http://www.badcaps.net/forum/showthr...999#post300999

            Inverter testing using old CFL:
            http://www.badcaps.net/forum/showthr...er+testing+cfl

            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
            http://s807.photobucket.com/user/budm/library/

            TV Factory reset codes listing:
            http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • ek2oo2
              Member
              • Oct 2013
              • 24
              • Philippines

              #7
              Re: Dell E198FPB with bad caps

              budm you are amazing...

              The culprit is the shorted (O ohms) 47uf/50v that is located nearest the pwm IC. It prevented the IC from powering up... Replaced with a spare cap with the same value. Dell 19" is up and running...

              Thanks Badcap.net.. what a great site.

              eugene

              Comment

              • Davi.p
                Hobbist Tech
                • Sep 2009
                • 4286
                • Italy - Milan

                #8
                Re: Dell E198FPB with bad caps

                that cap must be lowesr..

                Comment

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