Installing A Side Air Filter On A T640 Ac Power Supply; Figure 234: Removing The Ac Power Supply Side Air Filter - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
376

Figure 234: Removing the AC Power Supply Side Air Filter

Air filter bracket

Installing a Side Air Filter on a T640 AC Power Supply

To install the side AC power supply filter:
Verify that the customer site circuit breakers to the power supply is off, that that the
1.
voltage across the AC power source cord is 0 V, and that there is no chance that the
AC power cord might become active during the replacement.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to one of the ESD points on the chassis.
Install the replacement side filter.
3.
Using a Phillips (+) screwdriver, number 2, tighten the screws on the bracket located
4.
on the side of the power supply.
Reinstall the front filter element.
5.
Press the front filter cover straight onto the power supply faceplate until all four sides
6.
click into place.
Detach the ESD grounding strap from the ESD points on the chassis. Attach the ESD
7.
to an approved site ESD grounding point. Follow the instructions for your site.
Connect the AC power cord to the power source.
8.
Switch on the customer site circuit breakers to the power supply.
9.
Detach the ESD grounding strap from the approved site ESD grounding point. Follow
10.
the instructions for your site. Reattach the ESD grounding strap to one of the ESD
points on the chassis.
Verify that the LED on the power supply faceplate is lit steadily, indicating that
AC OK
11.
the inputs are receiving power.
Air filter
Copyright © 2013, Juniper Networks, Inc.