John,
I know this problem of heavy ground plane connection. Preheating the
assembly did help a lot.
"Long ago" in the age of PTH-IC´s they used to have solder iron tips to heat
all leads of a chip simultaniously mainly for rework purposes.
As I recall the oscillators do fit to those measures.
You could probably mount your solder iron, use flux and new solder for each
assy and dip it in the "pot" you created.
Haven´t tried it myself but seems to a less expensive methode if it works.
Good luck Wolfgang
-----Ursprüngliche Nachricht-----
Von: John Fahey [mailto:[log in to unmask]]
Gesendet am: Dienstag, 23. Oktober 2001 20:25
An: [log in to unmask]
Betreff: Re: [TN] Through Hole Oscillator Removal
Jerry
Thanks for the info. As you mentioned, the leads DO indeed have a heavy
ground plane connection that prevents us being able to use the traditional
soldering irons.
Are there any other options other than the Solder Fountain system. Also,
does anyone know where we could lease/rent this system as these are approx
$9K new and this is only a one time use.
Thanks
John
-----Original Message-----
From: Jeff Ferry [mailto:[log in to unmask]]
Sent: Tuesday, October 23, 2001 10:49 AM
To: [log in to unmask]
Subject: Re: [TN] Through Hole Oscillator Removal
John,
We have 4 Electrovert solder fountain systems, but suspect we would first
try using good old vacuum desoldering systems to remove the part, and
traditional soldering irons to replace it. The solder fountain systems may
be useful if the leads have heavy ground plane connections, but setup and
preparation for the solder fountain system may take longer that the
desolder/hand solder method.
You can see a little more about solder fountain rework on our website at:
http://www.circuittechctr.com/guides/8-1-2.htm
Jeff Ferry
CEO
Circuit Technology Center, Inc.
www.circuittechctr.com
[log in to unmask]
978-374-5000
Sign up for our Free E-mail Newsletter at:
www.circuittechctr.com/general/free_email.htm
-----Original Message-----
From: John Fahey [mailto:[log in to unmask]]
Sent: Tuesday, October 23, 2001 12:33 PM
To: [log in to unmask]
Subject: [TN] Through Hole Oscillator Removal
Good Morning.
I have a PCB assembly where I need to remove a 4 pin through hole
oscillator and replace it with a different date code. (@5K units)
AirVac recommends that this removal be done by heating the bottom side via
a solder pot system to reflow the solder, remove the component, and replace
it with a new one.. Unfortunately, there are 3 capacitors on the bottom
side which lie in the vicinity of the through hole leads which would
necessitate a specially designed zozzle.
Does anyone have ANY other advice/recommendations for a system to
remove/replace through hole components from a PCBA. I am particularly
interested ina ny systems that can be leased as this is a one time usage
requirement.
As always, I appreciate your excellent advice.
Rgds,
John
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