Figure 206: Installing a Front Air Filter Element
Replacing a Side Air Filter on a T640 AC Power Supply
1.
Removing a Side Air Filter on a T640 AC Power Supply on page 393
2.
Installing a Side Air Filter on a T640 AC Power Supply on page 394
Removing a Side Air Filter on a T640 AC Power Supply
To remove an AC power supply side air filter:
NOTE: The router has either one nonredundant power supply or two
redundant, load-sharing power supplies. If you have only one power supply,
you must power off the system before removing the side air filter on an AC
power supply. Each redundant power supply is hot-removable and
hot-insertable. When a redundant power supply is powered downor removed,
the other power supply automatically assumes the entire electrical load for
the router.
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
2. Switch the power switch on the power supply faceplate to the standby position.
NOTE: After powering off a power supply, wait at least 60 seconds before
turning it back on.
3. Detach the ESD grounding strap from the ESD points on the chassis. Reattach the
strap to an approved site ESD grounding point. Follow the instructions for your site.
393Copyright © 2017, Juniper Networks, Inc.
Chapter 29: Replacing Power System Components
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