something is wrong today

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  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3627
    • slovakia
    #1

    something is wrong today

    something is wrong today
    i have asus F5z that fires up only after heatedup so do a reflow and about 205c i hear puf and ic goes to short.
    next i wanna reflow ati GPU SB820 that not vanna showing picture so i heatid it to 195c to be sure it dont crack but after reflow it have one shorted power rail.

    it is so low temp that i canot understand why this happend. any help?
    Tags: None
    • Th3_uN1Qu3
      Believe in
      • Jul 2010
      • 6031
      • Romania
      #2
      Re: something is wrong today

      Moisture trapped inside the chips. Try longer preheating times, 15-20 minutes at 120-150C.
      Originally posted by PeteS in CA
      Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
      A working TV? How boring!

        Comment

        • ktmmotocross
          Boardkiller
          • Feb 2014
          • 3627
          • slovakia
          #3
          Re: something is wrong today

          but will be board ok after that long heated time? aint be bending?

            Comment

            • Th3_uN1Qu3
              Believe in
              • Jul 2010
              • 6031
              • Romania
              #4
              Re: something is wrong today

              If it's set nice and straight on the station, it will not bend.
              Originally posted by PeteS in CA
              Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
              A working TV? How boring!

                Comment

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