Removing soldered components

[JimS]

In an old issue of Byte, I read about this technique... It sounds wacky, and it does destroy the board, but it does work. ..  You clamp the board in a vise.. grab the chip the long way with a pair of locking pliers (vise-grips) and heat the solder side of the board with a torch. If you do it right, you can pull the chip out at one grab, before melting it. :-)  Naturally this is something best done outside, for safety and fumes.  I tried this a couple of times, but I used a 1000 watt heat gun instead of the torch. It worked, but I never got around to using the chips for anything.

[JimS]

jjans wrote:
Hey I LIKE that technique! Sort of similar to my original 'Red Green' style of using a hammer, a chisel, and a plier(and a case of beer). This technique works GREAT on WINDOZE machines...

Yeah, there is a certain satisfaction to torching a pc motherboard.... ya just have to add in a little Tim Allen-style grunting... :-)  

I've used the solder sucker method too... one thing I've found is that boards vary quite a bit. Those multi-layer boards drain a lot of the heat out of the iron... at least a cheap one like mine. :-)

[JimS]

KapitanKlystron wrote:
I believe that is called "non-destructive removal" :-D

It's more emotionally satisfying. :-)  

[JimS]

jjans wrote:

Both my A500's are REV 6A motherboards, which also mount 20pin 128 KB dips.

For my UFI fill for the day, does this mean the REV 5 motherboards mount the 8 x 16pin 64 KB Dips?

The Rev 5 A500 uses 16 256Kx1 drams... that's your 512K.  The Chips in the Rev 6 motherboards are  256K x 4 bit drams.

I doubt there's an easy way to use the older rams  in the 590.
... unless you want to glue them on the case for decoration.  :-)