On Wednesday 16 July 2003 01:04 pm, Declan Moriarty wrote:
> Any good tricks around for desoldering four layer throughole pcb parts?
>
> Where there is a ground layer, the desolder weapon I am using at 370
> degrees Centigrade doesn't heat the solder enough to melt it through;
> what seems to happen is that the board soaks up the heat, and the parts
> are only warmed.
If your goal is to recover the parts and not care about the board
then use a propain blow torch. With lots of ventilation, burnt board
is not a pleasent smell.
Sounds like the designer of the PCB did not put enough thermal relief
in their pad stacks.
If the goal is to recover the parts then see if you can come up with some Bismuth
or "ChipQuick" (I think that is spelled some odd way) and mix that with the solder
as you heat it. It significantly lowers the melting temperature of the solder.
--
http://www.softwaresafety.net/
http://www.unusualresearch.com/ http://www.bpaddock.com/
--
Author: Bob Paddock
INET: [EMAIL PROTECTED]
Fat City Network Services -- 858-538-5051 http://www.fatcity.com
San Diego, California -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB CHIPDIR-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
