unidentified component macbook pro A1278 (2010)

Discussion in 'MacBook Pro' started by Idari00, Jul 14, 2014.

  1. Idari00 macrumors newbie

    Joined:
    Jul 14, 2014
    #1
    Hello to all!

    I am a beginner, this morning I was doing a repair (a little weld on the backlight fuse - that with the spot) I accidentally touched with the welder another component, I would like to identify and replace but there is no value written on it.
    How I can identify it?
    unfortunately my fault I not removed the battery while operate, could be severe demage?
    please help me, I was working and now I can not continue.

    I turn to you because in my hometown nobody knows how to do (???)

    Thank you all in advance.
     

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  2. Idari00 thread starter macrumors newbie

    Joined:
    Jul 14, 2014
    #2
    unidentified component

    I forgot, the photo is not of my mac, the unknown component is that in the yellow circle.
    Thanks!!!
     
  3. Barney63 macrumors 6502a

    Barney63

    Joined:
    Jan 9, 2014
    Location:
    Bolton, UK.
    #3
    It looks like a capacitor, touching it with your soldering iron (as opposed to a welder lol) shouldn't damage it, they are quite robust components.
    However if it was powered on you will likely have damaged another component further down the circuit.


    Barney
     
  4. Idari00 thread starter macrumors newbie

    Joined:
    Jul 14, 2014
    #4
    The mac will not turn on now! I would like to know the value of this component to replace it! Today I put a smaller condensator, the mac turns on but does not have enough energy and immediately off. Ehat value has exactly the original!?
     
  5. brand macrumors 601

    brand

    Joined:
    Oct 3, 2006
    Location:
    127.0.0.1
    #5
    Have you done surface mount repairs on multilayered many times before?
     
  6. Idari00 thread starter macrumors newbie

    Joined:
    Jul 14, 2014
    #6
    No, never! It was a mistake, I know. The solder touch the capacitor and it burned! :(
     
  7. Idari00 thread starter macrumors newbie

    Joined:
    Jul 14, 2014
    #7
    No one can measure capacitor and tell me its value? Please! It seems impossible to find this value!
     
  8. SarcasticJoe macrumors 6502a

    SarcasticJoe

    Joined:
    Nov 5, 2013
    Location:
    Finland
    #8
    With a picture like that it's going to be pretty difficult. Tried to look up a better picture to see what exacty it was yesterday, but was unable to.
     
  9. Idari00 thread starter macrumors newbie

    Joined:
    Jul 14, 2014
    #9
    This is a photo where it is showing better! Is the one in the yellow circle! A1278 - WQ023TY2ATM logic board!
    While I was putting weld on the backlight fuse, touch this part and it burn.
     
  10. Idari00 thread starter macrumors newbie

    Joined:
    Jul 14, 2014
    #10
    The component in the yellow circle. The picture is very clear! Please, I just need the value of this capacitor.
     
  11. triplelucky macrumors regular

    Joined:
    Sep 30, 2012
    Location:
    Tucson, Arizona, USA
    #11
    It looks like it might be C4902 on the 820-2879 board.

    That would be the K6 schematic and C4902 would be 22uf @ 6.3V 20%.
     
  12. Idari00 thread starter macrumors newbie

    Joined:
    Jul 14, 2014
    #12
    Thanks you very much!!! :) :) :)
     
  13. Idari00 thread starter macrumors newbie

    Joined:
    Jul 14, 2014
    #13
    http://it.rs-online.com/web/p/condensatori-al-tantalio/5483731/
    This is correct?
     

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