soldering printed circuit boards (auto ECU)

Discussion in 'General Electronics Chat' started by s900t8v, Jul 5, 2012.

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  1. s900t8v

    Thread Starter Member

    Mar 12, 2011
    48
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    Hey all,

    Have plenty of experience soldering but I am thinking I will need to replace a couple of flash chips (located on a printed circuit board) of my ECU.

    I have seen numerous threads on the car forums regarding ways to do this, most reference DIY hot air guns and even more reference problems with lifting/damaging the pads of the PC boards and melting adjacent components :S... Being reasonably good at soldering I think that hot air seems criminal (although I know there are awesome quality reflow benches that slow heat/slow cool the work piece)


    I have seen on youtube people use chip quik which is a low melt temp solder (around 150c) and claims that it doesn't get hot enough to lift pads - it looks great on youtube lol, you just flux the chip flow the low temp solder on top of the regular solder, it stays molten enough & combines with regular solder to slide the whole chip off the board by lowering melting temp of normal solder (or so it says) has anyone got any experience with this, how good does it work anyone got any 1st hand experience?

    Obviously inverse to getting the board and too hot if you don't get it hot enough or use force to remove the board you damage the pads as well right as they just pull right off with the legs?

    Can you fix damaged copper trace pads?

    What's the best way for resoldering the chips, I've seen people on youtube just flux the chip, tin the iron and then jus touch it to a pin at each corner to tack it down (which seems logical to me), then they just use a drag solder technique (lying the solder over the pins and running the iron across them) does this work well ?
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    The owners of All About Circuits has elected not to host discussions of automotive electrical system modifications/enhancements due to safety concerns, the potential of legal ramifications and the possible circumvention of vehicle regulations at the state and federal level.

    This thread is against the AAC forum rules, Chapter 6, as seen here:

    This can be found in our Terms of Service (ToS)

    Automotive modifications of any kind are strictly forbidden. Therefore, this thread will be closed.

    Please try to understand the reasons behind this action, and feel free to browse and use the forums.

    You might find answers to your questions in one of these forums:

    http://forum.allaboutcircuits.com/showthread.php?t=54400

    Another good forum that shares many of the same membership is http://www.electro-tech-online.com/ . Good luck.
     
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