Declan --
I routinly remove throughhole parts with out problems from my 4-layer boards
with a basic solder/desolder rework station.
Some thoughts --
1. Are you using a proper desoldering tool. They have a hollow tip to drop
over the lead and a vacuum pump to suck out the solder.
2. Do your connections to the inner layers have proper thermals etched in.
If not, they will suck up the heat and make removal difficult.
3. Try more heat, my rework station uses about 85W elements. I usually set
them to 750 deg F for desolder work.
Preheating the boards may help. Try heating them to about 200 deg F in an
ordinary oven and keep them warm in towels on the way to the work bench.
Bob Smith
--- Avoid computer viruses, Practice safe hex ---
-- Specializing in small, cost effective
embedded control systems --
http://www.smithmachineworks.com/embedprod.html
Robert L. (Bob) Smith
Smith Machine Works, Inc.
9900 Lumlay Road
Richmond, VA 23236 804/745-1065
[EMAIL PROTECTED]
----- Original Message -----
To: "Multiple recipients of list CHIPDIR-L" <[EMAIL PROTECTED]>
Sent: Wednesday, July 16, 2003 1:04 PM
> 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.
>
> --
>
> With best Regards,
>
>
> Declan Moriarty.
> --
> Author: Declan Moriarty
> 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).
>
>
--
Author: Robert Smith
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).
