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Whats a K00AF ?

Discussion in 'General Electronics Discussion' started by Rxtech, Apr 28, 2013.

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  1. Rxtech

    Rxtech

    3
    0
    Apr 28, 2013
    Hi

    Having trouble identifying this part found in Asus laptop, and was just wondering if anyone could help.

    Its SMD 3 pin with the markings K00AF

    Any help would be appreciated.

    Thanks
     

    Attached Files:

  2. quantumtangles

    quantumtangles

    152
    3
    Dec 19, 2012
    These are not the droids you're looking for. I think this is what you are looking for.

    http://www.asusparts.eu/Asus-60-NXMLD1000-B01

    These other items popped up as well.

    http://www.ebay.co.uk/itm/Asus-E153...D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

    http://www.aliexpress.com/item/PCB0...6-E153302-SD-Audio-Jacks-Board/503931538.html

    http://www.replacedirect.be/product/p0070767/laptop-odd-board-voor-asus-k70/pn/E153302.html
     
    Last edited: Apr 28, 2013
  3. Rxtech

    Rxtech

    3
    0
    Apr 28, 2013
    Back of PCB

    Thanks Quantumtangles

    Yes the board is called a LID Board Assy using the part no. K52JR LID_BD./AS or 60-NXMLD1000-B01 unfortunately very hard to find.

    Measuring the competent (K00AF) as you would a transistor its a dead short, so i was hoping to just replace the K00AF (what ever that is).

    I have attached a pic of the back of PCB.

    Thanks again for your assistance.
     

    Attached Files:

  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,496
    2,837
    Jan 21, 2010
    My guess is that K00AF is a mosfet, but none of my lists of SMT markings include it.
     
  5. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,271
    Nov 28, 2011
    Just a crazy idea, but is it possible that this "lid board" detects when the "lid" (display) is closed? In that case it might be a hall effect sensor that's activated by a magnet in the lid.

    What is the fault on the laptop? What effect does disconnecting that board have on its behaviour?
     
  6. Rxtech

    Rxtech

    3
    0
    Apr 28, 2013
    Thanks Kris

    You may have a point re hall effect sensor…

    The fault with the laptop was a faulty power connector but the owner continued to use it, it eventually burnt a hole through the power PCB. I replaced the Power board with a new board but the laptop did not work (this small PCB connects to the power board). What I notice was that the 19V rail (Input from Powerpack) was not present when this small board was connected to power board, when disconnected the 19V rail would come back.

    Assuming the SMC was a transistor I checked it and it measured a short on all pins so I believe that was the fault.

    The laptop does not switch on when this board is removed.

    Thanks again.
     
  7. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,271
    Nov 28, 2011
    Are you sure both of those statements are true?
    You seem to be saying that (a) the 19V supply is not present (at some point in the power supply section, I guess) unless the "lid board" is disconnected, and (b) the laptop doesn't power up at all, regardless of whether the "lid board" is connected or not.
     
  8. quantumtangles

    quantumtangles

    152
    3
    Dec 19, 2012
    Boolean algebraic logic. Cool.
     
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