[c-nsp] heat fins popping loose on WS-X67xx cards

Lars Lystrup Christensen llc at dansketelecom.com
Thu May 28 16:59:10 EDT 2009

Hi Jay,

I've RMA'ed at least one board and could suspect other boards with the same flaw, so I believe this might be either a design fault or simply a faulty batch.


Med venlig hilsen / Kind regards

Lars Lystrup Christensen 
Director of Engineering, CCIE(tm) #20292

Danske Telecom A/S
Sundkrogsgade 13, 4 
2100 København Ø 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jay Ford
Sent: 28. maj 2009 18:19
To: cisco-nsp
Subject: [c-nsp] heat fins popping loose on WS-X67xx cards

In the past 9 days I've found that 3 of our Catalyst 6500 WS-X67xx cards (2
WS-X6748-GE-TX & 1 WS-X6748-SFP) had dislodged heat fins.  The fins are
supposed to be tethered by a spring hooked into a small wire loop which seems
to be soldered onto the circuit board.  In the case at hand the wire loop
pulls out of the board & the heat fin then flops around free & in 1 case the
wire loop was rattling around on the card.  Not good.

I'm trying to determine if this is a systemic problem or just a fluke.  It
seems like a design flaw, with the spring being too much for the soldered
wire loop.  Has anybody else seen this?  If so, with how many cards & of what

Jay Ford, Network Engineering Group, Information Technology Services
University of Iowa, Iowa City, IA 52242
email: jay-ford at uiowa.edu, phone: 319-335-5555, fax: 319-335-2951
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