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

[roy]

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