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    #21
    Re: Resistor question

    Originally posted by budm View Post
    Check the voltage on CN902 with nothing else connected to the power supply board and see if you do get any reading. Are you hearing any ticking sound from the power supply board?
    No power no sounds

    Comment


      #22
      Re: Resistor question

      There are 3-pin devices mounted on small heat sinks in the inverter circuit section, please take the RESISTANCE reading on 3 legs combination.
      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


        #23
        Re: Resistor question

        Just wonder what you are using for ground when testing the socket?
        If you look on the back of the board you can see the bottom two pins on the socket are ground. So working as budm suggests with only the power supply connected, test on the back of the board with black probe on bottom pin
        then with meter on vDC20 test each pin on the socket with the red probe.

        While you are there put the red probe also onto each side of F902 and see if any voltage there.
        Please upload pictures using attachment function when ask for help on the repair
        http://www.badcaps.net/forum/showthread.php?t=39740

        Comment


          #24
          Re: Resistor question

          Power fluctuates on socket the same on each side of fuse F902
          Last edited by 1supertech; 02-01-2014, 06:55 AM.

          Comment


            #25
            Re: Resistor question

            Originally posted by budm View Post
            there are 3-pin devices mounted on small heat sinks in the inverter circuit section, please take the resistance reading on 3 legs combination.
            q207
            b&c 0.02
            c&e 0.00
            b&e 0.02

            q206
            b&c 0.01
            c&e 0.00
            b&e 0.02

            q203
            g&s 0.00
            g&d 0.02
            d&s 0.02

            Comment


              #26
              Re: Resistor question

              it fluctuates? you mean each pin reads a different voltage or just 1 pin?

              Comment


                #27
                Re: Resistor question

                Originally posted by 1supertech View Post
                Power fluctuates on socket the same on each side of fuse F902
                ok but you need to tell us what the voltage is on each pin eg

                pin1 5-7 fluctuating
                pin2 o
                pin3 9.1 -12.4 fluctuating and so on

                Fuse both sides 15v -17.3v fluctuating
                Please upload pictures using attachment function when ask for help on the repair
                http://www.badcaps.net/forum/showthread.php?t=39740

                Comment


                  #28
                  Re: Resistor question

                  Originally posted by 1supertech View Post
                  q207
                  b&c 0.02
                  c&e 0.00
                  b&e 0.02

                  q206
                  b&c 0.01
                  c&e 0.00
                  b&e 0.02

                  q203
                  g&s 0.00
                  g&d 0.02
                  d&s 0.02
                  looks like they are all shorted - may have to take off and re test
                  one at a time.
                  can you post the part numbers
                  Please upload pictures using attachment function when ask for help on the repair
                  http://www.badcaps.net/forum/showthread.php?t=39740

                  Comment


                    #29
                    Re: Resistor question

                    Originally posted by selldoor View Post
                    ok but you need to tell us what the voltage is on each pin eg

                    pin1 5-7 fluctuating
                    pin2 o
                    pin3 9.1 -12.4 fluctuating and so on

                    fuse both sides 15v -17.3v fluctuating
                    pin1 0
                    pin2 0
                    pin3 036-169

                    Comment


                      #30
                      Re: Resistor question

                      there are 8 pins on cn902 how do you only have 3 pins?

                      Comment


                        #31
                        Re: Resistor question

                        put multimeter on dc voltage and check each pin with red probe on pin and black on chassis

                        Comment


                          #32
                          Re: Resistor question

                          Originally posted by philliesfan30m View Post
                          there are 8 pins on cn902 how do you only have 3 pins?
                          oops test power socket
                          will retest

                          Comment


                            #33
                            Re: Resistor question

                            are the pins listed on the board? if so list that next to the readings

                            Comment


                              #34
                              Re: Resistor question

                              Originally posted by selldoor View Post
                              ok but you need to tell us what the voltage is on each pin eg

                              pin1 5-7 fluctuating
                              pin2 o
                              pin3 9.1 -12.4 fluctuating and so on

                              Fuse both sides 15v -17.3v fluctuating
                              Retest
                              PIN
                              1 3-67v
                              2 3-67v
                              3 3-67v
                              4 3-67v
                              5 3-67v
                              6 3-67v
                              7 3-67v
                              8 3-67v

                              Comment


                                #35
                                Re: Resistor question

                                Originally posted by selldoor View Post
                                looks like they are all shorted - may have to take off and re test
                                one at a time.
                                can you post the part numbers
                                All tested good no shorts on DCA55

                                Comment


                                  #36
                                  Re: Resistor question

                                  1 of them has to be a ground. how can you get the same voltage on every pin?

                                  Comment


                                    #37
                                    Re: Resistor question

                                    Originally posted by philliesfan30m View Post
                                    1 of them has to be a ground. how can you get the same voltage on every pin?
                                    I tested from ground on power socket to all pins CN902 fluctuates 3-67 v normally I don't get
                                    power to CN902 with mainboard connected
                                    Last edited by 1supertech; 02-01-2014, 09:04 AM.

                                    Comment


                                      #38
                                      Re: Resistor question

                                      q207
                                      b&c 0.02
                                      c&e 0.00
                                      b&e 0.02

                                      q206
                                      b&c 0.01
                                      c&e 0.00
                                      b&e 0.02

                                      q203
                                      g&s 0.00
                                      g&d 0.02
                                      d&s 0.02

                                      Are they in Ohms, K Ohms, M Ohms? They do not look good.
                                      The voltage readings of 67V can only be from using the wrong ground ref. point. You should use one of the negative leg of the filter caps on the secondary side as the ground ref.
                                      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


                                        #39
                                        Re: Resistor question

                                        1- 0 k
                                        2- 0 k
                                        3- .99k-18.94k
                                        4- 0-.98k
                                        5- 23.5.98k
                                        6-4.91-5.30k
                                        7-0k
                                        8-0k
                                        all reading fluctuating except 0
                                        millimeter was set to 20k

                                        Comment


                                          #40
                                          Re: Resistor question

                                          It looks to me that this is getting very muddled.
                                          1supertech - you must say if you are not sure what we are saying.

                                          I can only assume English is not your first language and you dont understand
                                          Or you dont understand the electronic terms or both?

                                          If you can confirm that we can make allowances and try and explain better
                                          what you have to do.
                                          Last edited by selldoor; 02-01-2014, 04:38 PM.
                                          Please upload pictures using attachment function when ask for help on the repair
                                          http://www.badcaps.net/forum/showthread.php?t=39740

                                          Comment

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