Yamaha CS80

Hi guys,

Wonder if amyone here could give me a bit of avsice. I am trying to
desolder a 14pin IC from a double sided board.

It's not easy - what is the scret?

I have a spring loaded solder-sucker and can get the solder from the
'usual' side, but the thing is still solid.

How does one 'suck solder' from 'under' the chip...??

Cheers,
Tom

using a hakko 808 desoldering gun, you can just wiggle each leg slightly
once the solder is liquified. its so easy. do an entire 16 pin double sided IC in about 
15-20 seconds, and you visibly see that the points are clean. i know buying another 3-400 dollar part might seem silly/superfluous, but i would honestly rather dump a synth before dumping that thing. SO useful.-rj

--- On Mon, 2/16/09, Quazimodo <noddyspuncture@...> wrote:

From: Quazimodo <noddyspuncture@...>
Subject: [yamahacs80] Desoldering Double Sided Question...!?
To: yamahacs80@yahoogroups.com
Date: Monday, February 16, 2009, 7:20 AM











    
            Hi guys,



Wonder if amyone here could give me a bit of avsice. I am trying to

desolder a 14pin IC from a double sided board.



It's not easy - what is the scret?



I have a spring loaded solder-sucker and can get the solder from the

'usual' side, but the thing is still solid.



How does one 'suck solder' from 'under' the chip...??



Cheers,

Tom




 

      

    
    
	
	 
	
	








	


	
	


      

[Non-text portions of this message have been removed]

Quazimodo wrote:
> Hi guys,
>
> Wonder if amyone here could give me a bit of avsice. I am trying to
> desolder a 14pin IC from a double sided board.
>
> It's not easy - what is the scret?
>
> I have a spring loaded solder-sucker and can get the solder from the
> 'usual' side, but the thing is still solid.
>
> How does one 'suck solder' from 'under' the chip...??
>   
Tom,

For most double-side PCBs, this shouldn't be a problem with a 
solder-sucker. A somewhat counter-intuitive trick is to first add more 
solder to the pin/pad. Then heat it up well can remove the solder. 
Sometimes it may still stick a little. If you're not trying to save the 
chip, just cut the leads off and pull them out with pliers as you apply 
a little heat.  If it's a power pin and there's a huge power plane on 
the board it can be a pain since all the copper will suck the heat away.

 David