Juniper M120 Hardware Manual page 229

Copyright © 2018, Juniper Networks, Inc.
CAUTION: Before you replace a CB, you must take the host subsystem offline.
If there is only one host subsystem, taking the host subsystem offline shuts
down the router. See
CAUTION: If the CB to be replaced is associated with the Routing Engine
currently functioning as the master Routing engine, switch it to the backup
before removing the CB. See
page 267.
To remove a CB (see Figure 74 on page
Take the host subsystem offline. See
1.
page 267.
Place an electrostatic bag or antistatic mat on a flat, stable surface.
2.
Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
3.
ESD points on the chassis.
Loosen the captive screws on the ejector handles, using a Phillips (+) screwdriver,
4.
number 2.
Simultaneously rotate the ejector handles counterclockwise to unseat the CB.
5.
Grasp the ejector handles and slide the CB about halfway out of the chassis.
6.
Place one hand underneath the CB to support it and slide it completely out of the
7.
chassis.
Place the CB on the antistatic mat.
8.
If you are not replacing the CB now, install a blank panel over the empty slot.
9.
Chapter 26: Replacing Host Subsystem Components
"Taking the M120 Host Subsystem Offline" on page
"Taking the M120 Host Subsystem Offline" on
204):
"Taking the M120 Host Subsystem Offline" on
267.
203