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Where can I find these components other than china?? FETS and DC-DC IC's etc.

Discussion in 'General Electronics Discussion' started by apples, May 30, 2018.

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  1. apples

    apples

    97
    2
    Jul 1, 2012
    So on another thread I am looking for help to find out what component are causing a misfire with my car.

    I managed to swap over two Mosfets, a 32 pin surface mounted chip, a 15 pin Fet looking thing from a donor ECU board.
    (None of those parts made any difference to the misfire of the engine).

    So tonight I come home and remove another 15 pin Fet looking thing, put it in the ECU and the engine does not start. Then I freak out and put the original part back in, and the engine will not start with that either...arghhhh!!!

    I guess I must have overheated the part when I was hot airing it off the board??? I find that strange because I was able to remove other parts using the same technique and they did not get cooked and have worked fine, then this happens.

    So I have managed to find a website that lists the components and they give a basis quick description of what they are used for int the circuit. The problem is that they are from China. How can I find a new component that will be quicker than 5-20 postage time???

    These are the only part numbers that I have managed to find so far.

    66285
    55199 - this is the one I cooked by the sounds of things.
    09380232
    16205799
    42827
    16212886


    This is the one I need.....

    https://www.vipprogrammer.com/index.php?main_page=product_info&products_id=2107
     

    Attached Files:

  2. apples

    apples

    97
    2
    Jul 1, 2012
    Or how can I find a similar part that does the same job.
     
  3. Harald Kapp

    Harald Kapp Moderator Moderator

    10,792
    2,435
    Nov 17, 2011
    Have you tried the usual suspects?
    - Mouser
    - Farnell
    - Digikey
    - RS components
    - ...
     
  4. apples

    apples

    97
    2
    Jul 1, 2012
    yeah, I can't seem to have any luck
     
    Last edited: May 30, 2018
  5. kellys_eye

    kellys_eye

    4,275
    1,146
    Jun 25, 2010
    Those are all manufacturers in-house numbers - they won't be recognised by any 'domestic' supplier listing and I don't know where to get a cross-reference for them (if such exists).

    I still find that your assumption that there is something wrong with the ECU to be suspect - they are usually very, very reliable. Regardless, replacing parts on an ad-hoc basis isn't resolving anything - far from it. You've introduced additional faults by making such changes when, most likely, none existed before!

    It should be possible to power the ECU and simulate the inputs necessary to get it to 'do it's thing' and take the required measurements to determine where a fault lies - if one exists. Most inputs are simple DC voltages (0-5V or 0-12V) that can be simulated using potentiometers.

    Have you tried this method?

    If all else fails, just fit another ECU (swapping out your EPROM(s))
     
    dave9 likes this.
  6. dave9

    dave9

    983
    259
    Mar 5, 2017
    What evidence did you have that the ECU is causing the misfires? Is this vehicle common in Australia so you could just pull an entire ECU out of one from similar if not same model year and engine at a junk yard? Get it close enough and you won't need to swap the PROM.
     
  7. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,809
    Jan 21, 2010
    Replacing one part with another random part that has the same number of connections is unlikely to work, and may cause damage.

    You don't actually say, but I'll presume you replaced parts with others having identical markings.

    You may have damaged the board and a closeup image of both sides (where you have soldered a through hole part) may help us find a problem.

    Also, did you mount the device to the heatsink before soldering it, or attempt to do so afterwards? The latter approach will cause problems.
     
  8. apples

    apples

    97
    2
    Jul 1, 2012
    They are exact same part numbers, just swapping them over. I soldered it first then bolted it to the heatsink.

    Are you saying that maybe if it was solid and rigid when I bolted it to the heatsink I could have damaged the part?
     
  9. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,809
    Jan 21, 2010
    It is more likely that you damaged the board if you did it this way. But yeah you can damage the component too.
     
  10. apples

    apples

    97
    2
    Jul 1, 2012
    Hole-e-shit.........gotta upload a photo.
     
  11. apples

    apples

    97
    2
    Jul 1, 2012
    ECU_side_by_side.jpg
     
  12. apples

    apples

    97
    2
    Jul 1, 2012
    I think I have lost a resistor off my good working board............
     
  13. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,809
    Jan 21, 2010
    It looks like you may have lost the pads as well
     
  14. apples

    apples

    97
    2
    Jul 1, 2012
    What males you think that? On the board I see two nice and shinny square areas. Do you mean somewhere else?

    https://imgur.com/W5iwilc
     
  15. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,809
    Jan 21, 2010
    The images aren't very good (at least not on my phone) and from then the pads look dull. I interpreted this as then bring possibly pulled off. Since you have the real thing you can check for sure.
     
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