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Solder reflow

Discussion in 'Troubleshooting and Repair' started by Mr.fix it_101, Feb 15, 2016.

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  1. Mr.fix it_101

    Mr.fix it_101

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    Apr 11, 2015
    Goodday to all. Will doing a solder reflow with a heatgun or toaster oven fix circuit board problems? also, what are the do's and don't of using this technique. Your responses will be very much appreciated. thank you
     
  2. davenn

    davenn Moderator

    13,715
    1,911
    Sep 5, 2009
    Hi there

    in general I wouldn't trust it .... you are trying to fix dry joints by reflowing existing solder that there is no flux left in it
    all you will get is another remelted dry joint
     
    Martaine2005 likes this.
  3. Mr.fix it_101

    Mr.fix it_101

    30
    5
    Apr 11, 2015
    ok. So if I was to do a reflow on a BGA chip on a TV i am working on, it would just temporarly fix the problem? I don't want to throw away a board because of just one chip that simply lost contact with the traces. What do I do then? :(
     
  4. Mr.fix it_101

    Mr.fix it_101

    30
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    Apr 11, 2015
    thank you @davenn for your response
     
  5. Martaine2005

    Martaine2005

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    847
    May 12, 2015
    Your best bet is a hot air/solder station. A dedicated machine for this purpose.
    The trick is to remove the component, apply solder paste and apply heat again.
    I say a dedicated machine because people do use hot air guns that also release all the surrounding components too. Not a desired scenario for the best of engineers.
    They can be bought for as little as $50. on Ebay. But cheap does mean just that!!

    Martin
     
    Mr.fix it_101 and davenn like this.
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