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Sylvania LC320SS9 Flashing Green LED

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    #61
    Re: Sylvania LC320SS9 Flashing Green LED

    well that o2 micro chip does the switching controls of back light and what not it looks like?.....would make sense it to be a possible suspect.... just need to figure out how to test it...doing some reading myself.....thanks for sticking with me on this one, quite determined to figure this one out....thou i have much too learn...

    Comment


      #62
      Re: Sylvania LC320SS9 Flashing Green LED

      From the look of the board on the bottom side, it looks impossible for me to trace out the connections, still amaze how many Diodes it has in the inverter section, looks like at least 25 small diodes.
      So far no spec sheet except the one in the link I gave earlier.
      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


        #63
        Re: Sylvania LC320SS9 Flashing Green LED

        OK, I would like to find out if all the high voltage Inverter transformers are putting out the high voltage, you will need a Fluorescent lamp, solder a small solid wire to the bottom of the base to use it as a high voltage probe.
        Remove one lamp connector at a time, with the TV off, hold the Fluorescent lamp in your hand then stick the probe to the socket just enough to touch the pin on the socket, then turn on the TV, you should see the Fluorescent should flash on to indicate that it is putting out high voltage. Turn the TV off and then do the next lamp sockets to see if all of them will flash on the Fluorescent.
        Attached Files
        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


          #64
          Re: Sylvania LC320SS9 Flashing Green LED

          OK, after hours of searching, I found Philips TV that uses this IC OZ9926 for the inverter circuit. So check and see if pin20 has 24vdc voltage for the B+ for it to run.
          If it does, then short out pin 13 (Lamp current sensor) to ground to see if the lamps will stay on.
          Attached Files
          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


            #65
            Re: Sylvania LC320SS9 Flashing Green LED

            Originally posted by budm View Post
            OK, I would like to find out if all the high voltage Inverter transformers are putting out the high voltage, you will need a Fluorescent lamp, solder a small solid wire to the bottom of the base to use it as a high voltage probe.
            Remove one lamp connector at a time, with the TV off, hold the Fluorescent lamp in your hand then stick the probe to the socket just enough to touch the pin on the socket, then turn on the TV, you should see the Fluorescent should flash on to indicate that it is putting out high voltage. Turn the TV off and then do the next lamp sockets to see if all of them will flash on the Fluorescent.
            well i am certain that it does i already had this set apart and it will light all of its tubes for a good 1 1/2 seconds and very bright 1 1/2 second..... it has the u tube type come to find out....

            Comment


              #66
              Re: Sylvania LC320SS9 Flashing Green LED

              OK, Try shorting out pin 13 and see if it will stay on,or you may try new IC.
              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


                #67
                Re: Sylvania LC320SS9 Flashing Green LED

                Originally posted by budm View Post
                OK, Try shorting out pin 13 and see if it will stay on,or you may try new IC.
                ok tried shorting out pin 13 to ground and nothing ..soldered a wire to pin 13 and pig tailed it to other side so i could mount board and do the test...and same results...


                trying to figure out how how to test for 24 volts when board is mounted and powered on since the ic is on underside... probably have to solder a pig tail to that as well......

                Comment


                  #68
                  Re: Sylvania LC320SS9 Flashing Green LED

                  Not sure if this inverter use 24v dc or not. What DC voltage do you get on that secondary DC filter cap? I believe you had replaced the Rectifier Diode in that section.
                  Last edited by budm; 11-14-2012, 12:55 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


                    #69
                    Re: Sylvania LC320SS9 Flashing Green LED

                    This inverter uses about 60V, I think.
                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                    Comment


                      #70
                      Re: Sylvania LC320SS9 Flashing Green LED

                      Originally posted by budm View Post
                      Not sure if this inverter use 24v dc or not. What DC voltage do you get on that secondary DC filter cap? I believe you had replaced the Rectifier Diode in that section.
                      i will get readings for the dc filter cap ...i have not replaced any diodes at all in this set ...none of them are bad i tested them all ...i think your getting me confused with the guy that started this thread who did in fact change those 3 diodes because he had a short or open reading but the diodes on mine are fine and dandy....and same with another fella on here, his tested all good as well....

                      Comment


                        #71
                        Re: Sylvania LC320SS9 Flashing Green LED

                        yes mine are good also guys!

                        Comment


                          #72
                          Re: Sylvania LC320SS9 Flashing Green LED

                          This is an interesting test, thanks to johnboy1313:
                          http://www.bestelectronicarticles.co...ht-system.html
                          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


                            #73
                            Re: Sylvania LC320SS9 Flashing Green LED

                            Originally posted by budm View Post
                            This is an interesting test, thanks to johnboy1313:
                            http://www.bestelectronicarticles.co...ht-system.html
                            okay well the chip is officially dead the test killed it ...now i get no flash anymore ...the dc filter cap tries to climb to 30 volts but something is driving it back down.....it will slowly climb to 30 volts for a split sec then dwindle down to 10 volts ...now i have 2 problems here....

                            Comment


                              #74
                              Re: Sylvania LC320SS9 Flashing Green LED

                              The IC only drive the MOSFET, so if it does not time out, then the MOSFET may be damaged and can also be that there is bad transformerds or somethng that was already bad finally failed when it is being driven and force on. The link indicated that one of the transformer got hot.
                              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


                                #75
                                Re: Sylvania LC320SS9 Flashing Green LED

                                Originally posted by heavymachines View Post
                                okay well the chip is officially dead the test killed it ...now i get no flash anymore ...the dc filter cap tries to climb to 30 volts but something is driving it back down.....it will slowly climb to 30 volts for a split sec then dwindle down to 10 volts ...now i have 2 problems here....
                                OZ9926 and OZ9938 are different in its pinout pin 3 short killed the OZ9926 oh well thinking about replace the whole inverter board however thats a gamble... could replace the oz chip however have a feeling i will just be back where i was with that one problem i started off with....

                                Comment


                                  #76
                                  Re: Sylvania LC320SS9 Flashing Green LED

                                  It is what ever the TIMER PIN control is, so you used the same pin number but not the TIMER pin? The whole purpose is to kill the timer pin.
                                  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


                                    #77
                                    Re: Sylvania LC320SS9 Flashing Green LED

                                    Originally posted by budm View Post
                                    The IC only drive the MOSFET, so if it does not time out, then the MOSFET may be damaged and can also be that there is bad transformerds or somethng that was already bad finally failed when it is being driven and force on. The link indicated that one of the transformer got hot.
                                    never can get it to stay on to see if it has a bad transformer ...wish i had a ring tester.....the oz chip did not fry into smokes but now i lost that brief flash i had......right after that test so i guess i assumed it killed the oz chip...then again it could have finally finished off what was failing the whole time ....

                                    Comment


                                      #78
                                      Re: Sylvania LC320SS9 Flashing Green LED

                                      Originally posted by budm View Post
                                      It is what ever the TIMER PIN control is, so you used the same pin number but not the TIMER pin? The whole purpose is to kill the timer pin.
                                      did that got nothing but backwards now i have no flash at all.....

                                      Comment


                                        #79
                                        Re: Sylvania LC320SS9 Flashing Green LED

                                        Originally posted by heavymachines View Post
                                        did that got nothing but backwards now i have no flash at all.....
                                        also pin number 3 is not timer lol on this p.o.s, oh well found an entire inverter board for 35 buxs gonna try to talk him down.... see if i can just replace both boards since its such a pathetic excuse of a tv..... found the other board from same seller for 12 buxs lol its cheap enough to just replace it....P.O.S salvania also funai and several other brands have exact same setup as this ungodly turd.... diode haven....

                                        Comment


                                          #80
                                          Re: Sylvania LC320SS9 Flashing Green LED

                                          Well, lets us know if the new inverter board fixed the problem.
                                          By the way TIMER pin for this OZ9926 is pin 15 as shown in post 64.
                                          I was hoping that when you shorted out the TImer pin, the lamps will stay on.
                                          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

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