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March 2000

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Subject:
From:
Phil Nutting <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 13 Mar 2000 08:21:41 -0500
Content-Type:
text/plain
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text/plain (53 lines)
Roger,

We have experienced an unacceptable failure rate with bifurcated style
sockets.  Switching to machine screw contacts (like in Robinson Nugent ICE
series) has eliminated most of our problems.  These are a little more
expensive, but the small incremental cost more than out weighs the failures
and their associated costs.
The environment the product is located in can also have an effect.  An
example is computers located next to heavy smokers.  The buildup of smoke
scum can create a high resistance coating that will bring the system to its
knees.

Regards, Phil Nutting

-----Original Message-----
From: Roger Hill (home) [mailto:[log in to unmask]]
Sent: Sunday, March 12, 2000 11:52 AM
To: [log in to unmask]
Subject: [TN] IC Socket Contact Quality


I am having trouble with our equipment.  Field service techs think there are
periodic glitches which lockup our equipment, due to the contact quality
(tarnish, dirt?) between ic's and there sockets.  They are able to reset the
system by pulling out the ic and reseating.  The problem then can't be
duplicated.  We have thousands of these in the field - so soldering would be
very very expensive.

To date, the field techs have also been burnish the ic leads once they are
removed.  Can this damage surface of the contact?   Is there anything else
we can be doing?  We have tried some "contact enhancers" but have had
problems with it attacking the plastic ic socket so we are reluctant to go
in this direction.  Any ideas?

Thanks in advance

Roger Hill
972-245-2243  x203

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