Its BGA, and at least on the Hackberry Boards - a Multi-Layer PCB with about half the I/O in the inner layers... so features blind vias all over the shop<div>So its a tad more on a lot of boards than just removing the A10... its splitting the board layers too..<br>
</div><div><br></div><div>You can refer to my images here: <a href="http://dl.miniand.com/adr1an/images/Hackberry-Doubleboard.jpg">http://dl.miniand.com/adr1an/images/Hackberry-Doubleboard.jpg</a> which might help shed some light on.. the.. depth of the problem so to speak :)</div>
<div class="gmail_extra"><br><br><div class="gmail_quote">On 27 November 2012 01:33, jm <span dir="ltr"><<a href="mailto:joem@martindale-electric.co.uk" target="_blank">joem@martindale-electric.co.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
Does anyone have pictures of tracks under A10 chip<br>
(both sides) they could upload somewhere and point?<br>
<br>
I want to layout the A10 board. I've looked at photos<br>
of various boards and have a good idea where<br>
chips should go, but the tracking under the A10 is<br>
a mystery. If I get so see some working example,<br>
then I have best idea of what to be doing.<br>
<br>
I also note that at least one mboard for a tablet<br>
did not have many 0.1uF capacitors littered underneath the<br>
chip as is recommended. I suspect that either they made<br>
a mistake or the A10 only need one or two big tantalum<br>
to replace all the 0.1uF littered under the chip and still<br>
work very well.<br>
<br>
If you have duff broken board, you can put it into the<br>
gas oven, or place it on electric cooker, or better still,<br>
get an engineer to do it! and knock off<br>
the A10 to take some clear photos of the tracks under<br>
the A10 chip and upload it somewhere.<br>
<br>
Otherwise I have to sacrifice one of my working mk802 for the cause.<br>
I is sure you really really don't want me to do that do you? :-)<br>
<br>
<br>
<br>
<br>
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</blockquote></div><br></div>