Help! need to solder the wire to the TAB!

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  • capwizard
    replied
    Re: Help! need to solder the wire to the TAB!

    Pelco 16045 : PELCO Isopropanol Based Graphite Paint

    Conductive graphite paint, primarily designed for SEM sample preparation. The graphite flakes, with an average size of 1µm, are bonded by a cellulose resin with isopropanol as diluent. Good bonding properties on most materials. Graphite content is 20%. Ideal to mount samples on sample stubs or to make a conductive path to the sample surface. Let fully dry before using in the SEM. Maximum service temperature: 200° C. Use Graphite Paint Extender to dilute when needed.

    " would think about using conductive epoxy not paint. Its not cheap though."

    Pic1 : Yes, Not cheap, 1 oz is $276.9.

    https://www.tedpella.com/adhesive_ht...Comparison.htm
    Attached Files
    Last edited by capwizard; 03-09-2017, 09:05 AM.

      Leave a comment:

    • diif
      replied
      Re: Help! need to solder the wire to the TAB!

      I would think about using conductive epoxy not paint. Its not cheap though.

        Leave a comment:

      • srhofmann
        replied
        Re: Help! need to solder the wire to the TAB!

        Originally posted by capwizard
        Thank you cpt.charlie That is a very good idea but which conductive silver paint I should make.

        Make Conductive Silver Ink (complex ion based)
        https://www.youtube.com/watch?v=EBlqPS8boLI

        Conductive Silver Ink from a Ballpoint Pen
        https://www.youtube.com/watch?v=dfNByi-rrO4

        Expanded Version: Brew Your Own Conductive Ink
        https://www.youtube.com/watch?v=mF_Z8RUZjJE

        $1 DIY Conductive Ink and Paint (Non Toxic, homemade, cheap!) - Makerboat.com
        https://www.youtube.com/watch?v=W_ouYLeIkoo

        Super Conductive Carbon Ink
        https://www.youtube.com/watch?v=aTQIr8SzIPk

        How To Make A Conductive Ink
        https://www.youtube.com/watch?v=WR7SHPGGQ34

        How to make a Conductive ink - Acrylic based
        https://www.youtube.com/watch?v=Gdqkgkee0Ok

        conductive polymer
        https://www.youtube.com/watch?v=uUlmncSK-xg

        How to make a Conductive ink easy and cheap
        https://www.youtube.com/watch?v=Ik9hXkjX15A
        Good luck making reliable conductive paint. It needs to be flaked silver so there is plenty of overlap for conductivity, don't forget there's a binder agent to hold the silver together and to the substrate.

        Pelco 16045 is what you want to use on something that's flexible like kapton tape or a flexible tab bond on a panel.

          Leave a comment:

        • capwizard
          replied
          Re: Help! need to solder the wire to the TAB!

          Thank you cpt.charlie That is a very good idea but which conductive silver paint I should make.

          Make Conductive Silver Ink (complex ion based)
          https://www.youtube.com/watch?v=EBlqPS8boLI

          Conductive Silver Ink from a Ballpoint Pen
          https://www.youtube.com/watch?v=dfNByi-rrO4

          Expanded Version: Brew Your Own Conductive Ink
          https://www.youtube.com/watch?v=mF_Z8RUZjJE

          $1 DIY Conductive Ink and Paint (Non Toxic, homemade, cheap!) - Makerboat.com
          https://www.youtube.com/watch?v=W_ouYLeIkoo

          Super Conductive Carbon Ink
          https://www.youtube.com/watch?v=aTQIr8SzIPk

          How To Make A Conductive Ink
          https://www.youtube.com/watch?v=WR7SHPGGQ34

          How to make a Conductive ink - Acrylic based
          https://www.youtube.com/watch?v=Gdqkgkee0Ok

          conductive polymer
          https://www.youtube.com/watch?v=uUlmncSK-xg

          How to make a Conductive ink easy and cheap
          https://www.youtube.com/watch?v=Ik9hXkjX15A
          Last edited by capwizard; 03-08-2017, 08:42 PM.

            Leave a comment:

          • cpt.charlie
            replied
            Re: Help! need to solder the wire to the TAB!

            Mmmmm, maybe you could use some conductive silver paint and some tape to avoid any shorts while applying the paint.

              Leave a comment:

            • capwizard
              replied
              Re: Help! need to solder the wire to the TAB!

              Thank you, I use 400'c iron still can't transform heat to the top of the coupon tape. I try to bond the junk pre solder TAB to the PCB instead of using wires to repair.

              PS: If this method works, we can fix most water damaged TV.
              Attached Files
              Last edited by capwizard; 03-08-2017, 09:08 AM.

                Leave a comment:

              • srhofmann
                replied
                Re: Help! need to solder the wire to the TAB!

                Pelco 16045

                  Leave a comment:

                • llonen
                  replied
                  Re: Help! need to solder the wire to the TAB!

                  I will have a play with this when I get to back to the workshop as I could do with the practise, I do wonder about the long term reliability of these types of repair though. If you are able I would recommend coming from the via's. The other problem is in exposing the copper track's from the reverse substrate side you are effectively removing most if not all the supporting material.

                  I will however put some pic's up of the results.
                  Last edited by llonen; 03-07-2017, 07:49 PM.

                    Leave a comment:

                  • capwizard
                    replied
                    Re: Help! need to solder the wire to the TAB!

                    I try to use a junk piece of the ribbon cable to do the job

                    First I put solder on the junk TAB then try to overlap them together and put heat try to bond them together, because their do have the same spaces.

                    The problem is the TAB piece is too small to heat it up. I cant use the gas torch, MIG or TIG................
                    Attached Files
                    Last edited by capwizard; 03-07-2017, 02:08 PM.

                      Leave a comment:

                    • petehall347
                      replied
                      Re: Help! need to solder the wire to the TAB!

                      can you not jumper wire around the ribbon cable ?

                        Leave a comment:

                      • capwizard
                        replied
                        Re: Help! need to solder the wire to the TAB!

                        My situation is same as this video but I did not see he finished the job?

                        Recuperando flete LCD microscópio 500x Eletro Máquinas Wolinger tec.
                        https://www.youtube.com/watch?v=E-vkCWtpl_8

                          Leave a comment:

                        • capwizard
                          started a topic Help! need to solder the wire to the TAB!

                          Help! need to solder the wire to the TAB!

                          55" TV has water damaged on the TAB, after I changed two shorted SMD capacitors, now TV has picture but the TAB has 8 etched copper wires. (Before TV was cut off and T-con board was hot.)
                          My question is : it is very hard to solder the wires back to the TAB which took me whole day even I was using stereoscope............

                          PS: I Apologize for the blurry pictures more better pics on the way.
                          Attached Files
                          Last edited by capwizard; 03-04-2017, 02:14 PM.
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