Results 1 to 5 of 5

Thread: Removing & resoldering a can / shield?

  1. #1
    Join Date
    May 19, 2019
    Location
    Australia
    Posts
    4
    Thanks
    0
    Thanked 8 Times in 2 Posts
    Country: Australia

    Default Removing & resoldering a can / shield?

    Interested to hear the techniques used to remove a sealed shield or can like the one below, and then how they're reflowed back on to the PCB again? Hoping to be able to do this without a hot air reworking station or my very crude 'cut the top off with a Dremel and reseal it with a copper shim hat' method...


  2. #2
    Astro Spectra's Avatar
    Astro Spectra is online now T S - Moderator
    CS Forums $upporter
    Join Date
    Nov 22, 2012
    Posts
    811
    Thanks
    257
    Thanked 466 Times in 241 Posts
    Country: Great Britain

    Default

    With care you can use a hardware store hot air gun (commonly used for paint stripping). Practice on something you don't care about first and use a tin foil mask to avoid heating parts you don't want to unsolder. I use disposable oven liners as they're thicker than regular cooking foil.
    It is a fine thing to be honest, but it is also very important to be right

  3. The Following 3 Users Say Thank You to Astro Spectra For This Useful Post:

    jry (Jun 04, 2019),Mars (Jun 03, 2019),motorola_otaku (Jun 04, 2019)

  4. #3
    Join Date
    Jan 18, 2013
    Location
    In Your Network
    Posts
    2,510
    Thanks
    2,081
    Thanked 1,590 Times in 806 Posts
    Country: United States

    Default

    A hot air tool is less than a hundred dollars and works well.
    Killing Public Safety Streaming, One County at a Time...

  5. #4
    Join Date
    May 19, 2019
    Location
    Australia
    Posts
    4
    Thanks
    0
    Thanked 8 Times in 2 Posts
    Country: Australia

    Default

    I ended up getting the can off by mechanical means - carefully running a scalpel blade along the solder join several times until it was thin enough to flex the shield off the board.
    After modding the VCO, I'll use the hot air rework tool that'll arrive next week to reflow the shield back on. Any tips or tricks on what you do to make a good job of that task would be gladly appreciated eg: Solder paste & reflow? Place the can and run a bead of Sn/Pb solder along like you would some silicone sealant on a window?

  6. #5
    Join Date
    Jan 18, 2013
    Location
    In Your Network
    Posts
    2,510
    Thanks
    2,081
    Thanked 1,590 Times in 806 Posts
    Country: United States

    Default

    There are SEVERAL good tutorials on YouTube if you search for them. Those should give you the basics on what other people are doing. IF you have a dead radio or other electronics around, wouldn't hurt to practice first.
    Killing Public Safety Streaming, One County at a Time...

  7. The Following User Says Thank You to com501 For This Useful Post:

    motorola_otaku (Yesterday)