Identifying Caps - Any help appreciated :-)
Hello lovely iFixit Users and mods,
I was trying to fix my aunts Macbook as her little son spilled a little bit water over it. As I always wanted to fix a water damaged macbook once in my life I thought I give it a try. I bought an ultrasonic device and the right cleaning solution and cleaned it with it.
Now I inspected the board visually after all the white blueish things went away and saw that a few caps have no silver solder on their ends, instead you can see the ceramic part of the caps exposed. I want to change these but I am not sure how to find out which ones would suite it? Could anyone identify these?
I also need the same ones on the backside of the logic board (they look the same 100%).
Thank you all for your contribution :-)
Update (10/28/2017)
@reecee thanks again for your input on this. I will check the caps once my new multimeter will arrive. I will also try your tip with the detached keyboard etc. (I checked the keyboard, trackpad etc on another machine tho and all these parts seemed to work fine).
I also took picture of the logic board before I began to clean it. Here are they
Might help with understanding the current state more. This is the only area that was affected by the liquid spill as far as I could see as the water indicator on the other side was white but these two on the charging port side where marked red and that region had that blueish white stuff around the smd parts too.
I took pics of different angles too so if you need a specific area, name or mark it and I try to find out if I have pictures of it.
Thanks again for the help!
Cheers
Update (10/29/2017)
@oldturkey03 Sorry for the late reply, I somehow missed your comment. Yes here is a picture of these caps I am talking about (I only took a picture of one side but the other side looks the same with the same problem).
Upon further inspection I found this cap that is missing it's silver contact pad too (the cap in the red circle)
And these Inductors (i think these are inductors, sorry if i am wrong here) don't seem to be happy as well
un edited pic
Cheers
Update
The two chips mentioned by @reecee appear to have corrosion under them which can clearly be seen in this picture bellow:
The two chips up close
Different angle
According to iFixit these are 2x Texas Instruments CD3215B03 66AQ8YW G1 that are nowhere available?
So a reflow with some flux should maybe remove the corrosion under these chips I guess?
Cette question est-elle utile ?
13 commentaires
@md20 post some images of this "rows of caps and both of them have caps that are missing the silver contact pads for the solder to stick." Let's see what is going on with that.
par oldturkey03
@md20 I do not see any issues with the caps you've pointed out. I do see a lot of corrosion ;-)
par oldturkey03
The capacitors highlighted do not look bad enough to cause a problem (in most cases) and the inductors are fine; these are for the CPU voltages anyway I believe.
At the moment, it is very difficult to diagnose these boards since there are no schematics or board view files available for them; we only have the files for the touchbar model, which is different. I'm lucky enough to have a donor board for this model, so I can swap out parts without checking values, otherwise I could not definitely say what each component's values/purpose are for the most part.
From the pictures in your other answer, the main areas affected are the backlight driver area and the backlight sensing circuit. There are 2 big black chips in the 2nd picture and one of these has corrosion underneath. I believe these deal with the DC in and communication for the thunderbolt ports (one per port).
It's difficult to diagnose something online, especially when no schematics are available. May be better to wait until files are available :(
par Reece
@reecee man you already helped me out soo much, in fact I feel even more enlighted then before! I feel you on the online diagnosis thing as it is not really possible.. Could you maybe take the picture with the two chips and mark them? I uploaded a few pictures now and I am not sure which you mean exactly.. Also is there a way to measure these chips or do I have to replace them because of the corrosion? Maybe a re-work with some flux and heat can fix it underneath? Also is there a way for you to sell me the chip you where talking about with the corrosion of of your donor board? I think the best thing that could happen is when that chip/these chips are universal products that can be bought online through a wholesalers page like when you would buy smd capacitors etc. If there is a way link me or give me a hint please :-)
Cheers
par Musti
@oldturkey03 I am so glad to hear that these are fine as I can not even measure their value atm.. Can you maybe highlight me the things you see like corrosion so I know what to maybe rework? I am still pretty new to this and I do not plan on doing this as a bussiness thing because I just want to help out my aunt :) I normaly change iPhone, Laptop etc. Screens for my relatives and friends and do other basic things. I fixed a water damaged iPhone too but not like you professionals with heavy duty equipment :D Isopropyl alcohol and a gentle toothbrush helped me through this and a bit of luck :)
Cheers to you brilliant minds!
-Musti
par Musti
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