Sylvania LC-320SL1 - Inverter question

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • kevinjo
    Member
    • Aug 2014
    • 49
    • USA

    #1

    Sylvania LC-320SL1 - Inverter question

    I have a BA01F4f0103 and the inverter transformers run about 4.75 mohm give or take but there is one that measures 4.55 mohm. Would that be a red flag? What is the percent over the others that would make it unacceptable? Thanks a lot. Blinking green light with voltage ( 65volts ) to the inverter.
    Last edited by kevinjo; 01-02-2015, 08:15 PM.
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Sylvania LC-320SL1 - Inverter question

    "4.75 mohm" 4.75 milli-Ohms? Please clarify.
    Primary or secondary winding?
    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

    • kevinjo
      Member
      • Aug 2014
      • 49
      • USA

      #3
      Re: Sylvania LC-320SL1 - Inverter question

      4.75 Megaohms, secondary. Sorry

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Sylvania LC-320SL1 - Inverter question

        That will be way too high, they are usually around 500~2500 Ohms range depends on the transformer, not in Mega range.
        Are you sure you are reading at the correct pins?
        "voltage ( 65volts ) to the inverter." Are you talking about the Voltage on that white power connector?
        That white connector is the DC input for receiving about 160VDC from the main power supply board feeding this board.
        Last edited by budm; 01-02-2015, 11:12 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

        • kevinjo
          Member
          • Aug 2014
          • 49
          • USA

          #5
          Re: Sylvania LC-320SL1 - Inverter question

          The Lines coming from the filter on the main board. Not directly but in that area. I get no power from the white flat ribbon connector. I suspect the voltage is being terminated for some reason. I am reading the 2 pins on the transformer close to the bulb connector.

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: Sylvania LC-320SL1 - Inverter question

            Pictures of the whole back side so I can see how all the boards are connected?
            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

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #7
              Re: Sylvania LC-320SL1 - Inverter question

              The inverter transformers have dual HV windings.
              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

              • kevinjo
                Member
                • Aug 2014
                • 49
                • USA

                #8
                Re: Sylvania LC-320SL1 - Inverter question

                Here is the back side.

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #9
                  Re: Sylvania LC-320SL1 - Inverter question

                  See post 7.
                  I found that pix on SJ site.
                  I am still trying to understand how you get 65V to the inverter, how do you measure it and what is the Ground ref you were using and at the exact test points?
                  Last edited by budm; 01-03-2015, 02:33 AM.
                  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

                  • kevinjo
                    Member
                    • Aug 2014
                    • 49
                    • USA

                    #10
                    Re: Sylvania LC-320SL1 - Inverter question

                    Next to the filter cap is a white connector. This is 65volts input from the power supply ( DC ).

                    Comment

                    • kevinjo
                      Member
                      • Aug 2014
                      • 49
                      • USA

                      #11
                      Re: Sylvania LC-320SL1 - Inverter question

                      The windings measurements ( secondary ) per your terminals are :
                      T1050
                      • .536k
                      • .534k

                      T1100
                      • .541k
                      • .538k

                      T1150
                      • .541k
                      • .529k

                      T1200
                      • .529k
                      • .530k

                      Looks like the inverters is not my answer. Looking like a bad main I believe.

                      Comment

                      • kevinjo
                        Member
                        • Aug 2014
                        • 49
                        • USA

                        #12
                        Re: Sylvania LC-320SL1 - Inverter question

                        Although T1150 seems a bit lobsided?

                        Comment

                        • kevinjo
                          Member
                          • Aug 2014
                          • 49
                          • USA

                          #13
                          Re: Sylvania LC-320SL1 - Inverter question

                          CORRECTION: Voltage is not 66Volts. It is actually 166volts. Sorry for leaving off the 1.

                          Comment

                          • Shinju
                            Badcaps Legend
                            • Mar 2014
                            • 1239
                            • USA

                            #14
                            Re: Sylvania LC-320SL1 - Inverter question

                            Seems to be a lot of these popping up, I just got one that will not power on. I havent cracked into yet but once I do I will make a new thread if my affliction is different.

                            Comment

                            • kevinjo
                              Member
                              • Aug 2014
                              • 49
                              • USA

                              #15
                              Re: Sylvania LC-320SL1 - Inverter question

                              I actually lucked out and had a set in storage that had an upside down screen. I replaced it with this one and that is now working fine. I still need to know what is wrong with this one so I know if I find another screen, can still use the boards. I do have the upside down screen so I can still test things. If you have any ideas..send them. I see these all the time and usually not hard to fix.

                              Comment

                              • Shinju
                                Badcaps Legend
                                • Mar 2014
                                • 1239
                                • USA

                                #16
                                Re: Sylvania LC-320SL1 - Inverter question

                                Upside down images are strange, I just had a Proscan LED with this issue on a new compatible mainboard.

                                Comment

                                • kevinjo
                                  Member
                                  • Aug 2014
                                  • 49
                                  • USA

                                  #17
                                  Re: Sylvania LC-320SL1 - Inverter question

                                  I finally got around to check the main ( small leads give me problems eyes etc ). The main has nothing except 3.3v. So I think I am right and it is the main. Keep the screen in storage and add the boards ( except main ) into the inventory. Thanks and if I can help you..just let me know. I have a lot of parts.

                                  Comment

                                  • Shinju
                                    Badcaps Legend
                                    • Mar 2014
                                    • 1239
                                    • USA

                                    #18
                                    Re: Sylvania LC-320SL1 - Inverter question

                                    Originally posted by kevinjo
                                    I finally got around to check the main ( small leads give me problems eyes etc ). The main has nothing except 3.3v. So I think I am right and it is the main. Keep the screen in storage and add the boards ( except main ) into the inventory. Thanks and if I can help you..just let me know. I have a lot of parts.

                                    Will do, thanks for the offer! I am going to try and tear into it tomorrow.

                                    Comment

                                    Related Topics

                                    Collapse

                                    • x_orange90_x
                                      Vizio E55-E1 bad backlights or bad inverter?
                                      by x_orange90_x
                                      I just got this tv today and it appeared to have no backlight on. After taking off the rear cover and checking again in the dark I can see that MAYBE one quadrant is lit.. But still it's quite dim. I was going to check the LEDs with my tester, and I found LED 1 and LED 2 + pins on the wire from the inverter, but I couldn't identify a ground. Nonetheless I tried using a mounting screw on the inverter board and also the chassis as ground but regardless my tester reads 300 which is what it reads when there is no voltage draw.

                                      I don't know how exactly to test the inverter itself. Is it...
                                      01-29-2025, 09:24 PM
                                    • Gentian
                                      APSINT3636VR 3600W APS INT Series 36V DC 230V AC Inverter/Charger schematic
                                      by Gentian
                                      I have a tripp-lite aspint 3636vr inverter charger which blow some of mosfet transistors. I replaced them repaired also the driver circuit and tested but the mosfets burn again.

                                      It work very well as inverter and also as charger if I let the rear switch in auto mode (inverter) and charger only(charging) but in auto when I connect the feed line 220V AC first time it pass ok to line and start charging the batteries but when I remove the feed line it pass to inverter mode and if I do it again the second time when passing from charging to inverter the Main transformer start making a...
                                      03-06-2023, 07:07 AM
                                    • valvashon
                                      Insignia NS-LCD19-09 (PS OK, Inverter problem?)
                                      by valvashon
                                      For some reason I'm just not going to let this 19" TV defeat me. I guess because I have a schematic to work from I feel like I'm oh so close.

                                      History- while adding a turn-on circuit I let a small screw roll under the power board. Worked through all of that circuitry, probably replacing a MOSFET and PWM controller that were not bad but I was following the service manual. Finally figured out that the power supply is in working order when the inverter section (for the backlights) is disconnected. When the +12 supply to the inverter is disconnected the +12 and +5 will come up...
                                      01-04-2024, 01:44 PM
                                    • eccerr0r
                                      A modified sine wave inverter + a grid tie inverter?
                                      by eccerr0r
                                      If I had a solar fed grid tie inverter (GTI), a modified sine wave inverter, and a power outage occurred, what would happen if you disconnected mains, backfed the modified sinewave inverter (MSI) into house power, and hooked up the GTI to the output of the MSI, would it work?

                                      Next thing is trying to charge the batteries using solar power, but that's another issue ...
                                      08-31-2023, 09:14 PM
                                    • caseyjay_48
                                      Sony KDL-46BX450 Inverter Troubleshoot Logic
                                      by caseyjay_48
                                      I am currently on a troubleshoot of 46” Sony KDL-46BX450 tv. I came back from Washington to Texas on medical emergency and had to leave all my tools up there. All I have is a couple of screwdrivers and a dvm. I wish to ask the community a troubleshooting question. Please forgive stupid questions as meds I am taking produce brain fog.
                                      I have well maintained Sony KDL-46BX450. It went black one day. After turn-on, I get solid green light and Sony logo in screen center for about 1-2 seconds, then black. No blinking LEDs, no hissing. Flashlight test shows screen characters dimly viewable,...
                                      09-23-2022, 08:08 PM
                                    • Loading...
                                    • No more items.
                                    Working...