Cognitive Dissonance and Linux

[James Knott]

Lennart Sorensen wrote:
> Everything is going to BGA which is really not something
> you go replace.
Even "J" leads, which curl under the chip can be "fun".  I've never had 
occasion to work with BGA.  The SMT leads that extend out from the chip 
are fairly easy to work with, even with over 100 of them.  You just have 
to be careful.  The easiest way to remove one of those is to simply use 
a utility knife to cut all the leads, then wipe them off the board with 
a soldering iron.  Then place the replacement in position, with a small 
amount of liquid flux under the leads, and solder an opposite pair of 
pins and then, after verifying the correct placement, solder the rest.  
I got to the point where I could change one of those 100+ pin chips in 
about 10 minutes.  The J lead chips require a special removal tool that 
heats all the pins at the same time.





--
The Toronto Linux Users Group.      Meetings: http://gtalug.org/
TLUG requests: Linux topics, No HTML, wrap text below 80 columns
How to UNSUBSCRIBE: http://gtalug.org/wiki/Mailing_lists