Dissolve heat conductive cement

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • CapLeaker
    Leaking Member
    • Dec 2014
    • 8022
    • Canada

    #1

    Dissolve heat conductive cement

    Well… I am working on a Catapillar ECU (70 pin). I managed to take the main board on the top off after repeated prying, but how in the effin world does the driver board on the bottom come out? There is too much of that heat conductive cement on there. It's hard almost like a rock. I guess it has a dual function, having thermal conductivity and keeping things planted due to vibration. Thought of putting Acetone in there, but then I don't know if any of the plastics are going to melt.

    So how do I get that board heat conductive cement or whatever it is dissolved? Heat?
  • petehall347
    Badcaps Legend
    • Jan 2015
    • 4424
    • United Kingdom

    #2
    Re: Dissolve heat conductive cement

    a long soak in petrol sometimes works . must admit i never tried that with the hard stuff .

    Comment

    • CapLeaker
      Leaking Member
      • Dec 2014
      • 8022
      • Canada

      #3
      Re: Dissolve heat conductive cement

      I think I may unsolder more stuff and see what that does.

      Comment

      • stj
        Great Sage 齊天大聖
        • Dec 2009
        • 30945
        • Albion

        #4
        Re: Dissolve heat conductive cement

        the hard stuff if it's a blue-gray colour is epoxy resin loaded with zinc oxide.
        good luck if it's that!!!

        Comment

        • CapLeaker
          Leaking Member
          • Dec 2014
          • 8022
          • Canada

          #5
          Re: Dissolve heat conductive cement

          Originally posted by stj
          the hard stuff if it's a blue-gray colour is epoxy resin loaded with zinc oxide.
          good luck if it's that!!!
          Yeah that stuff you are talking about is epoxy... This stuff here is very light grey and not that epoxy hard, but hard. I've unsoldered more, but still can't get that damn board off or out.

          Comment

          • eccerr0r
            Solder Sloth
            • Nov 2012
            • 8678
            • USA

            #6
            Re: Dissolve heat conductive cement

            thermoset plastics need to be banned so that we can repair our electronics...
            (then again, IC encapsulation are thermosets...)

            Comment

            • CapLeaker
              Leaking Member
              • Dec 2014
              • 8022
              • Canada

              #7
              Re: Dissolve heat conductive cement

              Well… I opened that ECU. See other thread.

              Comment

              Related Topics

              Collapse

              • Document Archive
                Mounting and Handling Guidelines for TO220 TO220F TO247 Cases / Packages
                by Document Archive
                Mounting and Handling Guidelines for TO220 TO220F TO247 Cases / Packages

                The TO220, TO220F and TO247 are the popular packages for power devices because of their versatility and ability to dissipate moderate amounts of heat. This application note describes the basic guidelines for handling power MOSFETs in TO220, TO220 and TO247 packages shown in Figure 1. Please note that only mechanical and soldering guidelines are covered here. Additional precautions are required for isolating high voltage rated devices to meet safety regulations.

                Securing a good thermal interface between...
                10-07-2024, 04:35 AM
              • harp
                detecting heat with IR LED receiver
                by harp
                detecting heat with IR LED receiver

                I have some dark IR led, and want to know if it is be situable to detect pure heat (not visable glow ir radiation) in well lighted desk?

                So, if I put hand over it in near distance like few centimeters, that detect rising heat, not covering it from light.
                Something like termal camera, but in one spot, any simple circuit?...
                09-06-2023, 06:03 PM
              • ludovik
                Moto G84 short after heat
                by ludovik
                Hello everyone,
                i was reballing the power manger of a moto g84, after applying heat i tried to power on and it wouldn’t.
                i injected 1.5v to some capacitor that seem in short because both side beep if tested.
                when i inject i feel the cpu burning;
                since the cpu is exactly on the other side of the board, is that possible that the heat from the reballing damaged the cpu? do you know where i can find schematics or what can i do?
                i know this is not enough to explain the situation so if you need any other info ask me please!
                Thank you very much in advance
                11-08-2024, 02:13 PM
              • jm1234
                Solder joints on heat sinks matter?
                by jm1234
                Hi,
                solder joints on heat sinks - how much do they matter? Could poor joints on heat sink cause issues if they are not properly joining to hot ground?
                I'm looking at power source module of Panasonic plasma TV and I see many of these having visually poor quality, but could they matter? In general I would guess no, but I saw a video where someone was stressing out the importance of tightening the screws when fastening the power source board specifically for the ground to be connected properly.
                Thanks
                04-28-2024, 04:38 AM
              • myth77
                direct heat stencil,where do you get it? and how to prevent warping?
                by myth77
                So, lately i found that for smaller chips like pch it is very difficult to reball with nondirect heat stencil. So i decided to try direct heat stencils...and while i am waithing some stencils to arrive i have a few questions:

                1. From who do you buy a quality direct heat stencils? i am reading that they can vary in quality and make a big difference...Any trusted sellers?

                2. I am reading also the problem of warping (curving) direct heat stencils...Is it because of quality of the stencils? or/and because some preheating is also required? and help and advice here?
                01-17-2022, 05:06 AM
              • Loading...
              • No more items.
              Working...