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Hans G HH251 - 3 seconds to Black

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    Hans G HH251 - 3 seconds to Black

    Hi,

    i found a blown Fuse on my powersupply can someone tell me which fuse to use to exchange F102 in the Attached Picture?

    The Label on the Board says its an Delta DAC-12M070 AF Rev 00A
    Attached Files

    #2
    Re: Hans G HH251 - 3 seconds to Black

    I'm not sure of the answer to your question but you shouldn't assume that this will fix the problem. Something caused the fuse to blow and it is highly unlikely to be a power surge from the mains that did it. There will most probably some failed component(s) on the board that caused it to blow.

    Comment


      #3
      Re: Hans G HH251 - 3 seconds to Black

      Hey,

      i bet it was me causing the fuse to blow while i was trying to fix the 3 seconds to black problem.

      Comment


        #4
        Re: Hans G HH251 - 3 seconds to Black

        Originally posted by cholzberger View Post
        Hey,

        i bet it was me causing the fuse to blow while i was trying to fix the 3 seconds to black problem.
        Might not have been. The 3 seconds to black is almost always an issue with the backlight inverter. It could have burnt out the fuse.

        Check to see if the secondaries of the backlight transformers have any resistance, if one doesn't, then it is bad.

        Hope this helps ye,

        -Ben
        Muh-soggy-knee

        Comment


          #5
          Re: Hans G HH251 - 3 seconds to Black

          The 'Y' on my list is 5amp..BUT suspect there a lot more wrong with it than that,suggest you add photos of top and bottom of the Board !!

          Comment


            #6
            Re: Hans G HH251 - 3 seconds to Black

            nevertheless i have to replace that fuse at some point in time
            and i have no idea which one to order
            Last edited by cholzberger; 10-03-2012, 07:08 AM. Reason: spelling

            Comment


              #7
              Re: Hans G HH251 - 3 seconds to Black

              Top and Bottom of the Board attached

              i dont know which are the secondarys on this transformators?
              Attached Files

              Comment


                #8
                Re: Hans G HH251 - 3 seconds to Black

                These points.
                Attached Files
                Muh-soggy-knee

                Comment


                  #9
                  Re: Hans G HH251 - 3 seconds to Black

                  Ok,
                  both measure 530 Ohms

                  Comment


                    #10
                    Re: Hans G HH251 - 3 seconds to Black

                    The fuse goes onto a connector ??? does it say on the Board what voltage is supposed to be on there ???

                    Comment


                      #11
                      Re: Hans G HH251 - 3 seconds to Black

                      Yes the Fuse does go to the connector cable between logic board and power supply. i guess its 5.2 V.

                      Comment


                        #12
                        Re: Hans G HH251 - 3 seconds to Black

                        Take the resistance reading on the output side of the fuse and the circuit ground that feeds the main board to see if it has really low resistance.
                        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


                          #13
                          Re: Hans G HH251 - 3 seconds to Black

                          Ok i replaced the Fuse, now i have another problem, the monitor stays on for a while, then goes of after a few seconds, the higher i set the brightness the shorter the time to poweroff will be.

                          any suggestions on this one?

                          Comment


                            #14
                            Re: Hans G HH251 - 3 seconds to Black

                            Looks like you are now in the '2 secs to Black' mode, so folllow the instruction for that,and see how you go ?/

                            Comment


                              #15
                              Re: Hans G HH251 - 3 seconds to Black

                              ok, i located an bad ccfl,... wonder where to buy 25" ccfls?!

                              Comment


                                #16
                                Re: Hans G HH251 - 3 seconds to Black

                                http://www.ccflwarehouse.com/

                                Comment


                                  #17
                                  Re: Hans G HH251 - 3 seconds to Black

                                  Originally posted by cholzberger View Post
                                  ok, i located an bad ccfl,... wonder where to buy 25" ccfls?!
                                  Which one was it? I think I have the same problem in my monitor. I hear the clicking sound, but I cannot point out which ccfl is bad

                                  Comment


                                    #18
                                    Re: Hans G HH251 - 3 seconds to Black

                                    As heat rises ,I normally check the top set first.

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