Re: How do i check the clock circuit?

   While I doubt I am even a tenth as experienced as most folks on the
list, I did want to add one of my own observations WRT to rework,
specifically on older boards.

   After practicing removal on some chips/boards of whatever vintage
(old HDDs are great for chip/SMD practice), do try to find an older
board (dead) to practice on as well. Techniques that have served me
well with newer Micarta have lead to issues on older stuff...lifted
pads/traces being most common. The "adhesion" (for lack of a better
term) of these older boards doesn't always hold up to rework temps and
methods.

   Sadly, I've gotten so used to the MIL-SPEC stuff I use at work, I
have to remind myself to have more patience and take more care with the
older things I work on at home.
=)

EvilJim

On 9/24/2013 10:06 AM, John Robertson wrote:
> On 09/24/2013 8:45 AM, Jonathan Koolpe wrote:
>> Joel,
>>
>> I can chime in here a little to recommend that if you start needing
>> to remove unsocketed chips from your board that you pick up a
>> relatively cheap solder reworking station (such as those listed here
>> <http://www.amazon.com/s/?ie=UTF8&keywords=soldering+rework+station&tag=googhydr-20&index=aps&hvadid=21134554221&hvpos=1t3&hvexid=&hvnetw=g&hvrand=839441463805020909&hvpone=&hvptwo=&hvqmt=b&hvdev=c&ref=pd_sl_2xo9e1c30x_b>).
>>
>> I used to have difficulties removing unsocketed chips without pulling
>> up traces, particularly on Atari boards. But once I got the rework
>> station and learned how to use it, I never have this problem
>> anymore. Removing these chips is now a snap :) .
>>
>> But do be sure to watch a video on how to use it properly so you
>> don't damage your board...It's not hard or anything, but watching it
>> used by someone else first will be very helpful...there are plenty of
>> youtube videos to show how to use it. Here
>> <http://www.youtube.com/watch?v=A_JGCNNADp4> is one.
>>
>> Good luck!
>>
>> Jon
> Joel & Jon,
>
> I would really recommend that people first PRACTICE on an unimportant
> PCB!!! Learning how to remove ICs on your expensive/valuable/only game
> board is not a great idea...
>
> I've trained hundreds of students in the safe removal of ICs from our
> junk boards (local work experience program) and the first few are
> almost always damaging to both the PCB and IC...
>
> John :-#(#

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Received on Fri Sep 27 01:29:03 2013