Installing A T640 Scg; Figure 160: Removing An Scg - Juniper T640 Hardware Manual

Installing a T640 SCG

Copyright © 2013, Juniper Networks, Inc.
Press the online/offline button on the SCG faceplate and hold it down until the
4.
LED goes out (about 5 seconds).
If an external device is connected to one or both RJ-48 ports, disconnect the cables.
5.
Loosen the captive screws on the edges of the SCG faceplate.
6.
Grasp the SCG by the handle on the faceplate, and slide it out of the chassis.
7.
Place the SCG on the antistatic mat.
8.

Figure 160: Removing an SCG

To install a replacement SCG (see
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to one of the ESD points on the chassis.
Carefully align the sides of the SCG with the guides in the SCG slot.
2.
Grasp the SCG by its handle, and slide it straight into the chassis until it contacts the
3.
midplane.
Tighten the captive screws on the corners of the SCG faceplate.
4.
To bring the SCG online, press the online/offline button until the green
5.
To verify that the SCG is installed correctly and is functioning normally, check the
6.
LEDs on the SCG faceplate. The green
master, the blue
MASTER
To check the status of the SCGs, use the following CLI command:
user@host> show chassis environment scg
For more information about using the CLI, see the Junos OS manuals.
If an external clocking device was connected to one or both RJ-48 ports, reconnect
7.
the cables.
Chapter 17: Replacing T640 Router Hardware Components
Figure 161 on page 280):
LED should light steadily. If the SCG is
OK
LED should also light steadily.
OK
LED lights.
OK
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