Asus VE205

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  • eckertb83
    Senior Member
    • Jan 2011
    • 71
    • United States

    #21
    Re: Asus VE205

    Bump

    Comment

    • Rtech
      Badcaps Legend
      • Jul 2010
      • 1095

      #22
      Re: Asus VE205

      Put it on the Ω Range 2000

      Comment

      • eckertb83
        Senior Member
        • Jan 2011
        • 71
        • United States

        #23
        Re: Asus VE205

        Thanks for that Rtech

        I re-checked my readings on both the Primary and MOSFET. With the DMM set @ 2000 I got all 1's on every pin. Im taking this as they are bad and need to be replaced.

        I did a little more searching and found the primary on mouser here

        http://www.mouser.com/ProductDetail/...pyxwDW4IRW4%3d

        But still unable to find the MOSFET by its part numbers and I dont know how to find the specs of it to know what to replace it with. I'm posting a pic of each if it helps.
        Attached Files

        Comment

        • Rtech
          Badcaps Legend
          • Jul 2010
          • 1095

          #24
          Re: Asus VE205

          Part code 2SK3530

          Comment

          • eckertb83
            Senior Member
            • Jan 2011
            • 71
            • United States

            #25
            Re: Asus VE205

            Thanks I found it,

            http://www.mouser.com/ProductDetail/...%2fShmbA%3d%3d

            But if I can ask how did you come up with that part number? I tried searching K3530 and could find anything.

            Comment

            • Rtech
              Badcaps Legend
              • Jul 2010
              • 1095

              #26
              Re: Asus VE205

              2SK is very common,and lots of manufacturers now omit the 2S..so if you see a transistor etc starting with K always try 2SK..

              Comment

              • eckertb83
                Senior Member
                • Jan 2011
                • 71
                • United States

                #27
                Re: Asus VE205

                Thank you for that, I'm gonna place an order with mouser soon, but before I do is there anything else that I should check for that may have failed?

                Comment

                • Rtech
                  Badcaps Legend
                  • Jul 2010
                  • 1095

                  #28
                  Re: Asus VE205

                  I assume that a fuse also needs replacing ?//alsoif you look at the 2SK mosfet the right hand pin is the Source,and normally there would be a very small value resistor connected to that pin,the other ens of the resistor going to Ground..the value will probably be somewhere in the region of less than 1Ω.When Mosfets fail by going short circuit, this normally burns out as well.

                  Comment

                  • eckertb83
                    Senior Member
                    • Jan 2011
                    • 71
                    • United States

                    #29
                    Re: Asus VE205

                    I've already got the fuse on my list to order. I've looked over the board both sides and and I dont see any resistor attached to the source and ground pins. There is a disk cap connected to the source and drain pins as posted in the pictures attached. The cap had burned out and I have that on my order list as well. I labeled the source ground and drain along with the links in between them.

                    If you look post #7 or #9 pictures there is a resistor (Next to the DC Filter Cap) its on the source line but doesnt connect with the ground.

                    I hope I explained this well enough if not I will try again to explain it better.

                    *** I added another pic that links both source and ground with 2 resistors and cap in the middle,maybe this is that you mean.
                    Attached Files
                    Last edited by eckertb83; 09-23-2013, 07:22 PM. Reason: added another picture

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #30
                      Re: Asus VE205

                      By any chance, that snubber cap (connected to Source and Drain) tested shorted? That is the Source resistor, one end should be connected to the negative leg of the main DC filter, the is the Ground point of the Primary (hot side) of the circuit.
                      Last edited by budm; 09-23-2013, 07:15 PM.
                      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

                      • eckertb83
                        Senior Member
                        • Jan 2011
                        • 71
                        • United States

                        #31
                        Re: Asus VE205

                        Yes that cap between the source and drain shorted/burned out and the resistor (grey next to the main DC filter cap) is connected to the neg lead and the other to the Primary pos
                        pin 1 SO I will check that resistor and make sure it is with in spec. According to an app i found a while ago you can input the color of the bands on a resistor and it will tell you the resistance this one says .27 ohms +/- 5%

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #32
                          Re: Asus VE205

                          That is about the right value for Source resistor.
                          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

                          • eckertb83
                            Senior Member
                            • Jan 2011
                            • 71
                            • United States

                            #33
                            Re: Asus VE205

                            Im having a little trouble trying to figure out the watt size of this resistor, Trying to use ohm's law to figure it out, but I only have the resistance ( .27 Ohms or 270 milliohms). Trying to figure out voltage or amps, I'm not sure if the voltage would be 12v 24v or something else.
                            Last edited by eckertb83; 09-25-2013, 06:50 PM.

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #34
                              Re: Asus VE205

                              Does it show on the Ohm meter as bad resistor?
                              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

                              • eckertb83
                                Senior Member
                                • Jan 2011
                                • 71
                                • United States

                                #35
                                Re: Asus VE205

                                Honestly I don't know if it's good or bad. I've googled "how to test a resistor less than 1 ohm" and reading through I don't quite understand so I figured just replace it, it cant cost that much.....

                                Comment

                                • budm
                                  Badcaps Legend
                                  • Feb 2010
                                  • 40746
                                  • USA

                                  #36
                                  Re: Asus VE205

                                  Just touch you two probes together and read the result, then just check the resistance of that resistor, it will be about the same reading.
                                  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

                                  • eckertb83
                                    Senior Member
                                    • Jan 2011
                                    • 71
                                    • United States

                                    #37
                                    Re: Asus VE205

                                    Ok I checked the resistor in and out of circuit.
                                    To take it out of circuit I cut one lead near the board so if its good I can just re solder it.
                                    The ohm meter alone measured 1.7
                                    Resistor in circuit 1.9
                                    Out 1.6

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #38
                                      Re: Asus VE205

                                      It is OK, this Source resistor will usually goes open circuit due to shorted out MOSFET.
                                      BTW, The ohm meter alone measured 1.7, means your probe has high resistance due to small wire gauge being used instead of bigger gauge wire. Good probes will be less than 1 Ohm.
                                      Last edited by budm; 09-27-2013, 08:37 PM.
                                      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

                                      • eckertb83
                                        Senior Member
                                        • Jan 2011
                                        • 71
                                        • United States

                                        #39
                                        Re: Asus VE205

                                        I made a mistake on that reading, I had my DMM set to 200 instead of 2000. All 3 readings were 001 on the 2000 range the readings above are from the 200 range. Im assuming its good since if it was shorted i would get an out of range (OL/ 1) reading.

                                        Comment

                                        • eckertb83
                                          Senior Member
                                          • Jan 2011
                                          • 71
                                          • United States

                                          #40
                                          Re: Asus VE205

                                          Thank you, so I'll be ordering my parts now and once they get here and I get them installed I'll post my results

                                          Comment

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