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Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

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    #41
    Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

    I can get both P2804BDG and P5504EDG

    Comment


      #42
      Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

      http://forum.allaboutcircuits.com/sh...ad.php?t=21285 tells that

      the FETs or transistors are OK to use.

      Comment


        #43
        Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

        Originally posted by bonney View Post
        I can get both P2804BDG and P5504EDG
        Please tell me where?

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          #44
          Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

          Originally posted by dt2rz View Post
          Replaced the following parts on the inverter board:

          -10 caps with 100uf 25v 85*c 2000 hour Chemicon SMG

          -Q3 & Q4 with FDD6690, i can't find original P2804BDG

          -Q5 & Q6 with FDD6685, i can't find original P5504EDG

          Result is still the same. I tried checking the CCFLs one by one and all are

          lighting up fine. Can somebody guide me in testing the power supply. Here

          are some more pics of the power supply...
          i am not sure, but i looked at the specs for the fdd6690 and does not match the specs i think this is the problem. wrong fets.

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            #45
            Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

            dt2rz on the two fues's on the inverter whats the in voltage and the out voltage

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              #46
              Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

              Originally posted by bonney View Post
              dt2rz on the two fues's on the inverter whats the in voltage and the out voltage

              I don't really know how to check properly, can you tell me how? Here's a picture of the DMM i'm using.
              Attached Files

              Comment


                #47
                Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                Set it up how you did to check the power from you power board

                read this http://www.doctronics.co.uk/meter.htm#digital

                Comment


                  #48
                  Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                  With monitor powered off, put DMM to 20M ohm setting i get 0 ohm on both fuse.

                  Comment


                    #49
                    Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                    Originally posted by dt2rz View Post
                    With monitor powered off, put DMM to 20M ohm setting i get 0 ohm on both fuse.
                    Set the DMM to 200 ohms, not 20 Megohms.

                    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.

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                      #50
                      Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                      Originally posted by PlainBill View Post
                      Set the DMM to 200 ohms, not 20 Megohms.

                      PlainBill

                      DMM set to 200 ohms, both fuse read 00.4

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                        #51
                        Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                        now test the fuse with power on
                        Attached Files

                        Comment


                          #52
                          Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                          Originally posted by bonney View Post
                          now test the fuse with power on
                          f2 = 30.7
                          f3 = 1.2

                          Comment


                            #53
                            Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                            can you check does the power go through the blue coils then to the fuse?

                            Comment


                              #54
                              Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                              Originally posted by bonney View Post
                              can you check does the power go through the blue coils then to the fuse?
                              How to check these? What DMM setting to use and where to probe black & red wires? Sorry I'm a rookie.

                              Comment


                                #55
                                Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                                ok before we do that can you do the fuse's again but both ends

                                Comment


                                  #56
                                  Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                                  Flip the inverter upside down and hook the lamps up in reverse order. Does the dim part switch sides? Does the part that was formerly dim appear to light up properly?

                                  N Channel FDD6690A seems a satisfactory replacement for the P2804BDG. The hard part is finding a good replacement for the P-Channel P5504EDG. Too far out of spec and the inverter will shut down. Parts that do run can run hotter than the originals.

                                  Niko-Sem parts are easy to get in China.
                                  sig files are for morons

                                  Comment


                                    #57
                                    Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                                    Originally posted by severach View Post
                                    Flip the inverter upside down and hook the lamps up in reverse order. Does the dim part switch sides? Does the part that was formerly dim appear to light up properly?

                                    N Channel FDD6690A seems a satisfactory replacement for the P2804BDG. The hard part is finding a good replacement for the P-Channel P5504EDG. Too far out of spec and the inverter will shut down. Parts that do run can run hotter than the originals.

                                    Niko-Sem parts are easy to get in China.

                                    There is no dim part, all the lamps lights up together. Test it one by one, also lights up. Anyway i tried your suggestion and all lamps lights up like before. I'm wondering why the monitor goes to standby after 'no signal' shows up in screen. Other folks have the green light all the time, just the backlights shutting off By the way, sorry for hijacking your thread.
                                    Last edited by dt2rz; 11-01-2010, 05:49 PM.

                                    Comment


                                      #58
                                      Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                                      Originally posted by dt2rz View Post
                                      I'm wondering why the monitor goes to standby after 'no signal' shows up in screen.
                                      Every monitor I have does that. It is a power saving feature. At least it is if there is really no signal - if it does that when there is video going into it then there is a problem.

                                      Comment


                                        #59
                                        Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                                        Originally posted by dt2rz View Post
                                        I'm wondering why the monitor goes to standby after 'no signal' shows up in screen.
                                        Can you get into the menu before it shuts off? Some monitors will stay lit if you press the menu button right after it is powered on, even with no video signal. Others (for instance some Viewsonics) will not go into the menu if there is no video signal and will blank anyway.

                                        Comment


                                          #60
                                          Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

                                          I can not access the menu...

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