[c-nsp] 720x VXR -12V Sensor

[Matthew White]

Roy,

I encountered a similar issue with a 7204VXR + I/O-2FE/E + NPE-225.

I worked with TAC and started by replacing both power supplies; no good. This router was due for an NPE-G1 upgrade so I installed the replacement and kept the I/O controller installed; no good. I finally pulled out the I/O controller and that solved the problem.

-mtw
________________________________________
From: cisco-nsp-bounces at puck.nether.net [cisco-nsp-bounces at puck.nether.net] On Behalf Of roy [bandwidth.user at gmail.com]
Sent: Tuesday, September 22, 2009 03:52
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] 720x VXR -12V Sensor

Does anyone know which IC is being used by the 720x VXR router for
monitoring the voltage readings (specially the one for -12V)?

I've looked around and seems the DS1620 on I/O card is only for
temperature. I could be wrong though.

Would appreciate if anyone can point me into the right docs. Trying to
troubleshoot an internal -12V issue which shuts down my 7206VXR upon
reaching the threshold within 5 minutes of power-up.

This happens on C7206VXR chassis, NPE-400, I/O-2FE/E controller. I have
only been looking into the I/O controller. All tray fans working; input
voltage good and clean on either/both PSU's. Inlet/outlet temps within
range.

Thanks,

roy
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