COF Cables to panel repairable ? Help needed

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  • bohaboha
    Badcaps Veteran
    • Nov 2012
    • 973
    • sweden

    #1

    COF Cables to panel repairable ? Help needed

    Accident happens have bumped off a Cof and want to restore it but can't find the right way to do it. have looked at several videos but can't find anyone who uses the T type of soldering that I think is the easiest and I have it but have never used it. Is there anyone who can tell me how to use it and how much heat should i have, preferably a small tuto would be very good
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  • Answer selected by bohaboha at 03-14-2024, 03:40 PM.
    Davi.p
    Hobbist Tech
    • Sep 2009
    • 4316
    • Italy - Milan

    On AliExpress

    Comment

    • EazyBone
      Badcaps Legend
      • Jun 2023
      • 1319
      • United states

      #2
      I thought this wasn't possible, curious if someone knows also

      Comment

      • Davi.p
        Hobbist Tech
        • Sep 2009
        • 4316
        • Italy - Milan

        #3
        Need new ACF tape but time ago it was sold in expensive reels, now i don't know, probably there is at shorter quantity

        Comment

        • rogfanther
          Badcaps Veteran
          • Jul 2006
          • 458
          • Brazil

          #4
          Flux, some low-temp solder, and practice in some other boards to get a hang of it. Not much to it, clean the stripes, position correctly ( the hardest part ) and slide/press with the T tip.

          Comment

          • bohaboha
            Badcaps Veteran
            • Nov 2012
            • 973
            • sweden

            #5
            Originally posted by rogfanther
            Flux, some low-temp solder, and practice in some other boards to get a hang of it. Not much to it, clean the stripes, position correctly ( the hardest part ) and slide/press with the T tip.
            Thank you all for your replies
            EazyBone:I thought this wasn't possible, curious if someone knows also here : https://www.youtube.com/watch?v=t36YT7-5GTY
            Davi.p where can i find ACF tape ?
            rogfanther :can you say how high or low temp have to be used.of course i will practice ​

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            • Davi.p
              Hobbist Tech
              • Sep 2009
              • 4316
              • Italy - Milan

              #6
              On AliExpress

              Comment

              • bohaboha
                Badcaps Veteran
                • Nov 2012
                • 973
                • sweden

                #7
                Tank you Davi.p. can you tell me how hi or low temperatur should i use whith the t type soldering

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                • EazyBone
                  Badcaps Legend
                  • Jun 2023
                  • 1319
                  • United states

                  #8
                  Originally posted by Davi.p
                  On AliExpress
                  So your saying a line on the screen could potentially be fixed if I take off the cof ribbon and resolder it back on using this tape?

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                  • EazyBone
                    Badcaps Legend
                    • Jun 2023
                    • 1319
                    • United states

                    #9
                    Interesting videos a few different methods I see. Looks like I'm gonna pick up one and have some fun experimenting. Good deal

                    Comment

                    • Davi.p
                      Hobbist Tech
                      • Sep 2009
                      • 4316
                      • Italy - Milan

                      #10
                      A single subpixel vertical line is due to bad soldering on the cof (the chip), bad cof output (shorted internal transistor etc..) or oxidation and bad insulation on the flat output joint to the glass panel , in each case the T type tip is unuseful! T type are intended for simple little monochrome lcd displays like for handheld calculators, termostat, alarm keypads..
                      Last edited by Davi.p; 03-15-2024, 12:35 AM.

                      Comment

                      • EazyBone
                        Badcaps Legend
                        • Jun 2023
                        • 1319
                        • United states

                        #11
                        Originally posted by Davi.p
                        A single subpixel vertical line is due to bad soldering on the cof (the chip), bad cof output (shorted internal transistor etc..) or oxidation and bad insulation on the flat output joint to the glass panel , in each case the T type tip is unuseful! T type are intended for simple little monochrome lcd displays like for handheld calculators, termostat, alarm keypads..
                        Okay, but let's say a whole section from the cof turned green, like I recently had, or just a whole section in general had interference this could potentially be repaired then?

                        I'm not sure what a t type tip is actually

                        Comment

                        • Davi.p
                          Hobbist Tech
                          • Sep 2009
                          • 4316
                          • Italy - Milan

                          #12
                          with a certain color tint, with luck can be repaired i think

                          Comment

                          • bohaboha
                            Badcaps Veteran
                            • Nov 2012
                            • 973
                            • sweden

                            #13
                            Originally posted by Davi.p
                            A single subpixel vertical line is due to bad soldering on the cof (the chip), bad cof output (shorted internal transistor etc..) or oxidation and bad insulation on the flat output joint to the glass panel , in each case the T type tip is unuseful! T type are intended for simple little monochrome lcd displays like for handheld calculators, termostat, alarm keypads..
                            Hi Davi.p so you mean in my situation the t type soldering is useless? can you please elaborate Your thoughts therefore as you may have seen in the video he uses such a t soldering type

                            Comment

                            • bohaboha
                              Badcaps Veteran
                              • Nov 2012
                              • 973
                              • sweden

                              #14
                              Originally posted by EazyBone

                              Okay, but let's say a whole section from the cof turned green, like I recently had, or just a whole section in general had interference this could potentially be repaired then?

                              I'm not sure what a t type tip is actually
                              you wanted to try here another video that maybe you would see : https://www.youtube.com/watch?v=lF0xOC3ymGU

                              Comment

                              • Davi.p
                                Hobbist Tech
                                • Sep 2009
                                • 4316
                                • Italy - Milan

                                #15
                                bohaboha i was replying to eazybone, in your case the T could be ok, but the rubber strip reduces the heat much so must use high power.. a 80w iron minimum

                                Comment

                                • bohaboha
                                  Badcaps Veteran
                                  • Nov 2012
                                  • 973
                                  • sweden

                                  #16
                                  Originally posted by Davi.p
                                  bohaboha i was replying to eazybone, in your case the T could be ok, but the rubber strip reduces the heat much so must use high power.. a 80w iron minimum
                                  is the ACF tape a must or can i use something else ? if so what can i use? because i do not have it just now

                                  Comment

                                  • Davi.p
                                    Hobbist Tech
                                    • Sep 2009
                                    • 4316
                                    • Italy - Milan

                                    #17
                                    What do you want to use, a strip of cheese? Obviously need acf, is a special material

                                    Comment

                                    • bohaboha
                                      Badcaps Veteran
                                      • Nov 2012
                                      • 973
                                      • sweden

                                      #18
                                      Originally posted by Davi.p
                                      What do you want to use, a strip of cheese? Obviously need acf, is a special material
                                      lol Then I have to wait until I get it home
                                      thank you

                                      Comment

                                      • bohaboha
                                        Badcaps Veteran
                                        • Nov 2012
                                        • 973
                                        • sweden

                                        #19
                                        Originally posted by EazyBone
                                        Interesting videos a few different methods I see. Looks like I'm gonna pick up one and have some fun experimenting. Good deal
                                        hey when you've tried can you tell the resolt

                                        Comment

                                        • bohaboha
                                          Badcaps Veteran
                                          • Nov 2012
                                          • 973
                                          • sweden

                                          #20
                                          Originally posted by Davi.p
                                          bohaboha i was replying to eazybone, in your case the T could be ok, but the rubber strip reduces the heat much so must use high power.. a 80w iron minimum
                                          you say i have to use high power 80w but in the market all i find is 30,40,60w and even my own is same 60w

                                          Comment

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