Can you comment on these caps I bought?

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  • mockingbird
    Badcaps Legend
    • Dec 2008
    • 5484
    • -

    #1

    Can you comment on these caps I bought?

    Hello,

    I am trying to repair a 2005 27" Sanyo CRT TV with a Samsung tube. None of the caps on the mainboard show any signs of damage but the symptom (TV is very difficult to turn on - but when it does turn on it stays on) is indicative of cap failure and I also know that all the caps that are on this board are generic garbage (If it helps, the main caps are "JIF", and there are FDAI, JM, and "Peace" caps) and that many caps fail without bulging.

    I am going to purchase all but the smallest caps because someone here suggested that they need not be replaced (Albeit they are the majority of the caps on the board), and I've already found whatever I could not find at my (relatively) local store on Digikey.

    But I need help with two things:

    1) This store's cap section was a mix of many junk brands like G-Luxon and other garbage but they also have Nichicons, Rubycons, and UCC (United Chemicon). Is this indicative of fake caps? The store seems to be owned by questionable people so I wouldn't put it past them to try and sell fake caps.

    2) Most of the series of the UCCs and Nichicons that I bought seem to be older series that have now been replaced. I've confirmed on their website that these series did exist and they even have reference charts to show what they have been replaced with. So again, does the fact that they are selling older series prove that they're fakes and also if they are legitimate, will these series perform well?

    Here is what I bought:

    1) Nippon Chemicon 200v 680uF - (M) CF (Snap In)
    2) UCC 35v 470uF - "KME" 55(7) Brown/White
    3) UCC 50v 470uF - "SME" 2(k) 3B Black/White
    4) Nichicon 35v 100uF - KL(M) H0310 Orange/Black (Won't use these, they're too fat and from what I can gather, they're meant for audio. But they look the coolest of all by far)
    5) Nichicon 25v 47uF - PV(M) A9611 Brown/White
    6) Panasonic 250v 10uF - Color on these is Blue/White and the only unique marker I can see is: "81IIBA" and if it helps the temperature is 85c.

    I will try to get pics posted later today. All the bungs on these look like ones you'd find on legit ones but the indentations on the metal vents are shallow which I heard is indicative of fake caps. I want to be sure they're adequate before I place the order with Digikey.

    Also, there are two caps on the motherboard that I wonder if they need replacing. They're strange looking ones that are wrapped in black plastic and they're skinny in the middle and fat at the top and bottom. One is labeled at the top "044 NJ" and the other "601 NJ". What are these?

    Thanks.
  • Wizard
    Badcaps Legend
    • Mar 2008
    • 2296

    #2
    Re: Can you comment on these caps I bought?

    Those two are inductor coils in the deflection section. Leave them alone.

    Yes these capacitors do dry out and show no outward signs. Samsung usuually used Samwha/Samyoung in these. Looks like someone replaced them at one point.

    Cheers, Wizard

    Comment

    • momaka
      master hoarder
      • May 2008
      • 12170
      • Bulgaria

      #3
      Re: Can you comment on these caps I bought?

      The only caps I can comment on from that list are KME and SME.
      The colors you mentioned for the KME and SME caps sounds right. They are indeed old caps. The ones I have I took out from a very old computer monitor (built around early 90's). Pictures of them should be able to reveal if they are fake or not. If the bungs look real though, chances are that they are probably real. The bigger problem is that caps that old just may have dried out or deteriorated even if they are new.

      Originally posted by mockingbird
      the main caps are "JIF", and there are FDAI, JM, and "Peace" caps
      Some odd names there...
      JIF - good for peanut butter jelly sandwitches .
      And may the "Peace" caps rest in peace.

      Comment

      • mockingbird
        Badcaps Legend
        • Dec 2008
        • 5484
        • -

        #4
        Re: Can you comment on these caps I bought?

        Can someone help me with another problem?

        I kept using the TV when the fault protection was kicking in and it wouldn't turn on. I would cycle it alike 1000 times until it turned on and only decided to repair it when it wouldn't turn on at all and all the caps had finally failed.

        Now I've replaced all the caps with Nichicons, UCCs, and Rubycons.

        It fixed the proble, the TV turns on but there is a green tint. This green tint was intermittent when I first got the TV but now it seems permanent.

        The only thing resembling a solution was something I read over at fixya:
        "The reason the screen is green is due to the power failure detector function of the CPU IC801 on the main board detecting abnormal condition derived from the video board's horizontal output transformer. In this case causing a stoppage of the horizontal output oscillator from k23VDA (15) X-radiation protection Hold-Down circuit. What happens during the failure is the CPU remains uncorrected eventhough the power might of been shut down at times, the CPU still detects the abnormal condition and will not correct itself.
        The solution could be one of three possibility going on during this condition. What seems to work every time is separation of the main board and the video board. These boards are at 90 degrees with one another, and contaminates may be settling down in the Hold-Down circuit which is also part of the seating, and connection between both causing an error. A good cleaning seems to get the connection and circuitry functioning properly.
        One possibility why this works also is it refreshes the Hold-Down circuit causing a refresh of the CPU which then corrects itself. One could debate on rather the diodes holding a voltage across themselves even when the TV is turned Off for a minute then On doesn't allow the CPU to correct itself because the CPU really see's the same condition with no change because the diodes may be energizing to quickly. But when separation occurs trips the Hold-Down circuit and relays and the rest of the circuits have to energize too along with the diodes alerting the CPU of change which then corrects itself.
        I really lack the time to see what is really happening and Sanyo might have too. We both came up with the solution it works, so why fix it."
        I have the service manual for a very similar model to this TV, would it help if I posted the diagrams because I don't understand what this guy is talking about.

        Thanks.

        Comment

        • PCBONEZ
          Grumpy Old Fart
          • Aug 2005
          • 10661
          • USA

          #5
          Re: Can you comment on these caps I bought?

          Probably new caps unbalanced the tuning by shifting a frequency or too from where it was. [Not like tuning stations, like tune-up, tweek, adjust.]
          -
          Can probably get it back in order by carefully adjusting all the Red, Green, Blue pots until it looks good.
          I usually face the set to a mirror on the work table so I can see the colors without coming from behind the set for each tweek.
          .
          Mann-Made Global Warming.
          - We should be more concerned about the Intellectual Climate.

          -
          Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

          - Dr Seuss
          -
          You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
          -

          Comment

          • mockingbird
            Badcaps Legend
            • Dec 2008
            • 5484
            • -

            #6
            Re: Can you comment on these caps I bought?

            Originally posted by PCBONEZ
            Probably new caps unbalanced the tuning by shifting a frequency or too from where it was. [Not like tuning stations, like tune-up, tweek, adjust.]
            -
            Can probably get it back in order by carefully adjusting all the Red, Green, Blue pots until it looks good.
            I usually face the set to a mirror on the work table so I can see the colors without coming from behind the set for each tweek.
            .
            I just turned it on now and the color was good and then it kept flashing betwwen good and green and then went back to the green tint.

            Comment

            • PCBONEZ
              Grumpy Old Fart
              • Aug 2005
              • 10661
              • USA

              #7
              Re: Can you comment on these caps I bought?

              Look for bad solder joints.
              Might be something you did or disturbed or might just be an old bad solder joint.
              Mann-Made Global Warming.
              - We should be more concerned about the Intellectual Climate.

              -
              Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

              - Dr Seuss
              -
              You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
              -

              Comment

              • mockingbird
                Badcaps Legend
                • Dec 2008
                • 5484
                • -

                #8
                Re: Can you comment on these caps I bought?

                Originally posted by PCBONEZ
                Look for bad solder joints.
                Might be something you did or disturbed or might just be an old bad solder joint.
                Any tips on detecting cold solder joints? I'm not adept at IC repair yet.

                Comment

                • PCBONEZ
                  Grumpy Old Fart
                  • Aug 2005
                  • 10661
                  • USA

                  #9
                  Re: Can you comment on these caps I bought?

                  Look for:
                  Joints that look dull [solder was too cold to bond]
                  Places where it looks like the solder didn't 'stick'
                  and joints with cracks around the leads.

                  A magnifying glass helps. [Or sometimes 3x or 3.5x reading glasses.]
                  .
                  Mann-Made Global Warming.
                  - We should be more concerned about the Intellectual Climate.

                  -
                  Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.

                  - Dr Seuss
                  -
                  You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                  -

                  Comment

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