Function of MBP logic board copper pins
Hello
What function do the red circled copper pins do have, which are "all over" the logic board of e.g. my MBP A1286 or A1297?
One of them has been broken and it seems as there is a copper line below it on or within the PCB.
Picture has been attached.
Regards, Stone
Update (08/23/2013)
And the location of the sound chip itself, labeled with u6200 ... http://root.dietmarstein.com/tmp/a1297/p...
Ist dies eine gute Frage?
3 Kommentare
I've always wondered the same thing, hopefully someone will shed some light.
von LikeARabbit
What I can tell you is they are not described in the Apple Technicians Guide. So they don't offer a general service tech anything useful, that means they are used in manufacturing process or may offer a board level tech something useful at a test/power point. Thats not to say they don't have a function as a VIA (electrical pathway though the PCB board layers). So a damaged one could have an effect here. Are you having issues with your logic board?
von Dan
Hi Dan
Yes, it is all about the problem with my 2009 A1297 which sound card is not working properly. To sum up: sometimes it is working (it seems, if the MBP gets warm and some little pressure on the bottom).
I was thinking of them pins as being reference points for measurement or even grounding points. I am not sure if they do touch the bottom cover but it is possible.
If so and they need to touch the bottom then MBP would not run properly without bottom case installed.
To be honest I haven't had the time until now to have a closer look to my "broken" A1297, but I remember, that one of these pins broke off the PCB and it happened during normal use, so the pin felt off the case, as I opened the MBP for HDD change.
I also remember, it is one of the pins which can be found right hand side, if the MBP is placed on its top and the superdrive is on the left hand side.
I could not find them on the schems, too.
Will have a closer look tomorrow, if the sound chip is near the broken pin.
Regards, Stone
von Stone