Cap Identification

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  • breast69au
    Member
    • Aug 2012
    • 16
    • Australia

    #1

    Cap Identification

    Hi,

    My Tv the backlight has gone out. Can see the image in the back but there is no backlight. When the Tv is turned out the light stays on for a 1second then turns off. So I took the back off the Tv and the first thing that jumps out is there is three blue capacitors that have gone brown. I have unsoldered them to identify the caps.

    This is what is on them

    Cap 1.
    LY
    SL6KV
    27J

    Cap 2.
    39
    6KV
    SEC

    Cap 3.
    LY
    SL6KV
    10J

    I'm pretty sure that cap 1 is a 27pf 6000volt 5% tol high voltage ceramic cap, and cap 3 is a 10pf 6000volt 5% tol high voltage ceramic cap. I am unsure of cap 2.

    Here are pictures of the board and caps.

    Please help
    Attached Files
    Last edited by breast69au; 08-28-2012, 05:25 AM.
  • selldoor
    Slow Learner
    • Dec 2010
    • 7870

    #2
    Re: Cap Identification

    Please can you remove the inline pictures and post them using manage attachments
    which can be found by clicking on go advanced below quickreply
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

    Comment

    • breast69au
      Member
      • Aug 2012
      • 16
      • Australia

      #3
      Re: Cap Identification

      sorry fixed

      Comment

      • selldoor
        Slow Learner
        • Dec 2010
        • 7870

        #4
        Re: Cap Identification

        Great - thanks its probably 6000v 39pF however these tend to crack when they are bad.
        From your description is could be the inverter transformer can you check the secondary windings - if you can read the part number or put up a picture of the back of the board we can help locate them.
        There is a guide written by a retiredcaps and perhaps reading that starting at post 19 will give more ideas of problems - please mention the make/model of Tv.
        https://www.badcaps.net/forum/showthread.php?t=10419
        Please upload pictures using attachment function when ask for help on the repair
        http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • breast69au
          Member
          • Aug 2012
          • 16
          • Australia

          #5
          Re: Cap Identification

          The model of the tv is a Vivo LTV40FHD.

          On the board it has LKP-PI1005, but it did have a sticker over it with LK-PI400106E.

          The 39 is smaller then the rest of them. The 27J is the worst of all three, it is quite brown but it isnt cracked.
          Attached Files
          Last edited by breast69au; 08-28-2012, 06:06 AM.

          Comment

          • breast69au
            Member
            • Aug 2012
            • 16
            • Australia

            #6
            Re: Cap Identification

            is it normal that when i test the 27j cap that the multimeter says 19.16kohm???

            Comment

            • Duncanbest
              Senior Member
              • Jul 2012
              • 81
              • Taiwan

              #7
              Re: Cap Identification

              FYR

              CAP 2 ---> maker

              http://www.cc-sec.com/products/eindex.asp

              Comment

              • breast69au
                Member
                • Aug 2012
                • 16
                • Australia

                #8
                Re: Cap Identification

                Thanks for the info, but i dont understand what i am looking at

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #9
                  Re: Cap Identification

                  10pf 6KV: http://www.mouser.com/ProductDetail/...GLQiW4arsCM%3d

                  27PF 6KV: http://www.mouser.com/ProductDetail/...38jKatAcwgE%3d

                  39pf 6.3KV: http://www.mouser.com/ProductDetail/...vEm6UKrZGP0%3d

                  Cap is a open circuit device, it should not show DC resistance reading.
                  By the way 'J' = +/-5% capacitance tolerance.
                  Last edited by budm; 08-28-2012, 08:49 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

                  • jeff2631
                    New Member
                    • Oct 2010
                    • 4

                    #10
                    Re: Cap Identification

                    That looks like one I have at: https://www.badcaps.net/forum/showthread.php?t=22210
                    Are you sure the first cap is 27pF because mine are 39pF, 39pF, and 10pF.
                    Digikey did not have 39pF and I was going to solder a 12pF to a 27pF to make a 39pF.
                    The two 39pF were in parallel on the circuit board so I put a 12pF on a 33pF and put a 33pF for a total of 78pF (same as two 39pF).
                    TDK part number CC45SL3JD330JYNN for the 33pF and CC45SL3JD120JYNN for the 12pF.
                    Also CC45SL3JD100JYNN for the 10pF and CC45SL3JD270JYNN for the 27pF.
                    I bought ten of each and selected USPS first class mail ($2.60).

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #11
                      Re: Cap Identification

                      Are you sure that the 39pf is directly connected in parallel, that will have quite low Xc for the lamp ballast (lamp will draw more curent)? How big is this TV?
                      Last edited by budm; 08-28-2012, 09:03 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

                      • jeff2631
                        New Member
                        • Oct 2010
                        • 4

                        #12
                        Re: Cap Identification

                        Originally posted by budm
                        Are you sure that the 39pf is directly connected in parallel, that will have quite low Xc for the lamp ballast (lamp will draw more curent)? How big is this TV?
                        The circuit board traces went to both caps C43 and C44.
                        It is a 37 inch LCD.

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #13
                          Re: Cap Identification

                          OK, for TV that big, it makes sense to have big caps supplying all the lamps.
                          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

                          • breast69au
                            Member
                            • Aug 2012
                            • 16
                            • Australia

                            #14
                            Re: Cap Identification

                            yeah it was differently a 27pf in c44

                            Comment

                            • jeff2631
                              New Member
                              • Oct 2010
                              • 4

                              #15
                              Re: Cap Identification

                              Are C41 and C42 both 39pF? I was able to read them without unsoldering. Had to bend them a little. Wonder if the wrong one got put in there. All the ones on the backlight circuit card are 27pF on mine.
                              Both C34 and C36 are 10pF.
                              My C43 was the problem. Not sure how long the others will last but I bought extras if I have to replace them later.

                              Comment

                              • selldoor
                                Slow Learner
                                • Dec 2010
                                • 7870

                                #16
                                Re: Cap Identification

                                One problem might be that the OP doesnt have the original caps?
                                I have been looking at the area deciding which are the secondary windings on the transformer and think that are as marked . In doing so I see where the 3 caps have been removed but also that the other three do not look "factory"
                                so perhaps all 6 were replaced previously?

                                OP can you see what markings are on your other 3

                                Transformers - think these just provide power to the inverter board? but you can still check - power off meter on ohms check S1 >S2 and S3>S4 dont know what to expect but may show up a mismatch or open.
                                (just in case new caps dont fix it)
                                Attached Files
                                Please upload pictures using attachment function when ask for help on the repair
                                http://www.badcaps.net/forum/showthread.php?t=39740

                                Comment

                                • mark_kevin2009
                                  New Member
                                  • Oct 2012
                                  • 2
                                  • Australia

                                  #17
                                  Re: Cap Identification

                                  hi breast69au, i got the same problem with these capacitors on my 40" VIVO LCD, can you please help where can i purchase this 3 kind of capacitors here in Australia?

                                  cheers!

                                  Mark
                                  Attached Files
                                  Last edited by mark_kevin2009; 10-09-2012, 08:58 AM. Reason: attached file

                                  Comment

                                  • breast69au
                                    Member
                                    • Aug 2012
                                    • 16
                                    • Australia

                                    #18
                                    Re: Cap Identification

                                    www.x-on.com.au

                                    Comment

                                    • mark_kevin2009
                                      New Member
                                      • Oct 2012
                                      • 2
                                      • Australia

                                      #19
                                      Re: Cap Identification

                                      thanks for the info, but they don't have the 39 6KV ceramic capacitor? did u get yours from other suppliers?

                                      cheers!

                                      Comment

                                      • budm
                                        Badcaps Legend
                                        • Feb 2010
                                        • 40746
                                        • USA

                                        #20
                                        Re: Cap Identification

                                        If you have room, you can parallel 27 and 10 together instead.
                                        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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