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Hp elitedisplay e231 monitor

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    Hp elitedisplay e231 monitor

    Hi ..I need the diagram of the power supply of this monitor .. liquid leaked in it, and some parts exploded ... I did not find the exact scheme, but just something similar .. does not want to start .. thank you ..
    Attached Files
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    #2
    Re: Hp elitedisplay e231 monitor

    What was the PWM U901?

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      #3
      Re: Hp elitedisplay e231 monitor

      Originally posted by lotas View Post
      What was the PWM U901?
      I don't know exactly ... it had a hole in it ... but, I'm sure of the LD757 ... the rest couldn't be seen ... I solder the LD7575, but maybe it was the LD7576 ...
      Q901 = P0765ATF
      D908 = 1N4148
      R923 = 220 OHM
      R924 = 0.47 OHM
      I don't know the value of R915, R917, U901..the rest of the parts are OK..I didn't find an exact scheme, I tried the approximate schemes I found, but it doesn't start ..
      Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

      >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

      Every donation made will go towards server fees and maintenance costs.

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        #4
        Re: Hp elitedisplay e231 monitor

        This is somewhat similar to your circuit.
        Attached Files

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          #5
          Re: Hp elitedisplay e231 monitor

          Originally posted by lotas View Post
          This is somewhat similar to your circuit.
          yes .. thanks for the diagram ... the problem is that I still have resistance R915 in series with R917 and I don't know the value ... although LD7575 is compatible pin to pin with LD7576, less pin 1 (CT, RT) .. .This pin is for programming the switching frequency. By connecting a resistor to ground (LD7575), .... By connecting a
          capacitor to ground (LD7576) .. here I think is the problem .. I will put a resistor with value (0) instead of R915 ..
          Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

          >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

          Every donation made will go towards server fees and maintenance costs.

          Comment


            #6
            Re: Hp elitedisplay e231 monitor

            everything works perfectly..for LD7576 it is used in pin "1" C927 = 0.047mf, without R921, for LD7575, C927 is removed, and R921(100Kohm) is solder..R915 strap ..
            Last edited by peste; 11-22-2021, 11:26 AM.
            Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

            >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

            Every donation made will go towards server fees and maintenance costs.

            Comment


              #7
              Re: Hp elitedisplay e231 monitor

              So his native PWM was LD7576.

              Comment


                #8
                Re: Hp elitedisplay e231 monitor

                Originally posted by lotas View Post
                So his native PWM was LD7576.
                Yes..
                Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

                >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

                Every donation made will go towards server fees and maintenance costs.

                Comment

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