what IC or component is this: KJGA7. diode bridge ?

Discussion in 'General Electronics Chat' started by didvidyn, Dec 6, 2017.

  1. didvidyn

    Thread Starter New Member

    Jul 18, 2017
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    Im beginner in electronics but am good as soldering.

    this is from automotive diagnostics test tool: GM MDI.
    no connection to computer. opened it up and notices this 6 pin IC burnt.
    seems like diode bridge ?
    asked one guy on mhh forums http://mhhauto.com/Thread-help-GM-MDI-not-showing-up-in-Tech2-anymore
    that has same device he he said it says "KJGA7" on it.
    cant find anything about this component.
    20171205_100539_2.jpg 20171205_100526_2.jpg
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    The fact it has D notation points to it, also appears to have 6 pins?
    Max.
     
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  3. didvidyn

    Thread Starter New Member

    Jul 18, 2017
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    Yea. But when I search for KJGA7 on Google can't find anything. With what kind can I replace with ?
     
  4. be80be

    AAC Fanatic!

    Jul 5, 2008
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  5. RichardO

    Late Member

    May 4, 2013
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    There is a connector near your blown part. It is labled J9. Is that a USB connector? If it is then D9 might be protection components for the USB data lines.


    Something like a NUF2030XV6 or NUF2042XV6, for example?
     
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  6. didvidyn

    Thread Starter New Member

    Jul 18, 2017
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    Yes, Between j9 and j10 that's mini USB connector. That one on the very left partially visibly is Ethernet connector. either can use etherent or USB to connect to pc, i tried both and neither are working so after this component burnt.
     
  7. didvidyn

    Thread Starter New Member

    Jul 18, 2017
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    No way to know what exact component is it ? I don’t want to install a wrong component and fry even more stuff
     
  8. didvidyn

    Thread Starter New Member

    Jul 18, 2017
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    got TEA1731. its slightly larger than original part was but i soldered it in.
    still device doesnt work. perhaps this is incorrect part.

    also when i plug the GM MDI into computer an error pops up "usb device not recognized"
    and the part gets very hot.
    most likely this is not the correct part.
    hopefully i didnt do more damage to this device
     
  9. be80be

    AAC Fanatic!

    Jul 5, 2008
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    You need the schematic for it But that maybe never find.
     
  10. didvidyn

    Thread Starter New Member

    Jul 18, 2017
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    searched, cant find anything
     
  11. kubeek

    Expert

    Sep 20, 2005
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