Replacing A Centralized Clock Generator; Removing A Centralized Clock Generator; Figure 144: Removing A Ccg - Juniper PTX5000 Hardware Manual

Replacing a Centralized Clock Generator

Removing a Centralized Clock Generator

Copyright © 2017, Juniper Networks, Inc.
Removing a Centralized Clock Generator on page 265
1.
Installing a Centralized Clock Generator on page 266
2.
The packet transport router can have one or two CCGs installed. The CCGs are located
in the upper rear of the chassis, above the Control Boards and Routing Engines. Each
CCG weighs approximately 1.9 lb (0.9 kg).
A nonredundant CCG is hot-pluggable. For redundant CCGs, the master CCG is
hot-pluggable. The backup CCG is hot-removable and hot-insertable if the master CCG
is functioning. Removing the backup CCG does not affect the functioning of the packet
transport router. Taking the master CCG offline might result in a brief loss of SONET clock
lock while the backup CCG becomes the master.
To remove a CCG (see Figure 144 on page
Place an electrostatic bag or antistatic mat on a flat, stable surface.
1.
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.
Press the online/offline button on the CCG faceplate and hold it down until the LED
3.
goes out (about 5 seconds).
Loosen the captive screws on the edges of the CCG faceplate.
4.
Grasp the CCG by the handle on the faceplate and slide it out of the chassis.
5.
Place the CCG on the antistatic mat.
6.

Figure 144: Removing a CCG

Chapter 25: Removing and Installing Chassis Components
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265