11 Nov
2005
11 Nov
'05
10:19 p.m.
Subject: removing parts from PCBs
From: compoobah at valleyimplants.com
Date: Fri, 11 Nov 2005 20:31:31 -0600
To: <cctalk at classiccmp.org>
I've seen several references to using torches to remove DIPs from PCBs. Are there any
specific things to keep in mind to avoid heat damage? Are you talking propane
plumber's blowtorches?
Dang, thats one long line!
Yes, work fast.
Myself I torch the bottom and use a spring loaded chip extractor.
That and a pliers or tiny screwdriver to straighten any bent
pins keeping it in the board.
Success rate to date is 99% (board was known bad before salvage).
Allison
12 Nov
12 Nov
7:16 p.m.
On Sat, November 12, 2005 3:19 am, Allison said:
Myself
I torch the bottom and use a spring loaded chip extractor.
That and a pliers or tiny screwdriver to straighten any bent
pins keeping it in the board.
I'm right in assuming this technique requires a bit of practice? :)
There's me spending half an hour warming up the Leister blower when all I
need to do is get the soldering torch from my toolkit? Not sure how well
that would go down at work :D
--
adrian/witchy
Binary Dinosaurs creator/curator
www.binarydinosaurs.co.uk - the UKs biggest home computer collection?
7:45 p.m.
Witchy wrote:
On Sat, November 12, 2005 3:19 am, Allison said:
Not for ICs, no. I've found with things like IDC connectors it's a bit
trickier as it's hard to keep the heat even across the whole socket and
not damage it (plus such sockets tend to be at the edges of boards and
so the heat 'spills over' to the top-side and damages the socket)
Of course the chips tend to be the important bit. I do often salvage
capacitors and diodes from boards too though, just to make sure I've got
a useful supply in the parts box.
If I've got a large board I tend to use the camping gas stove as it
spreads the heat nicely across large sections of board. Do in a well
ventilated area obviously, PCBs tend to produce nasty fumes!
cheers
Jules
Myself I torch the bottom and use a spring loaded
chip extractor.
That and a pliers or tiny screwdriver to straighten any bent
pins keeping it in the board.
I'm right in assuming this technique requires a bit of practice? :) 
13 Nov
13 Nov
3:55 a.m.
Jules Richardson wrote:
Witchy wrote:
I use a hot air paint stripper to heat up the solder side, component
side down, and then tap it against either my wooden workbench or
stainless steel kitchen sink to get all the chips out. I got about a
meg of 41256s out of scrap boards like that once, and doubled the memory
in my second ever PC.
Gordon.
On Sat, November 12, 2005 3:19 am, Allison said:
Not for ICs, no. I've found with things like IDC connectors it's a bit
trickier as it's hard to keep the heat even across the whole socket and
not damage it (plus such sockets tend to be at the edges of boards and
so the heat 'spills over' to the top-side and damages the socket) Myself I torch the bottom and use a spring loaded
chip extractor.
That and a pliers or tiny screwdriver to straighten any bent
pins keeping it in the board.
I'm right in assuming this technique requires a bit of practice? :)
6827
days inactive
6828
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3 comments
4 participants
participants (4)
-
ajp166＠bellatlantic.net -
gordonjcp＠gjcp.net -
julesrichardsonuk＠yahoo.co.uk -
witchy＠binarydinosaurs.co.uk