Removing The T640 Scgs; Removing The T640 Rear Fan Tray; Figure 54: Removing A T-Cb; Figure 55: Removing An Scg - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide

Removing the T640 SCGs

Removing the T640 Rear Fan Tray

100

Figure 54: Removing a T-CB

The router can have one or two SCGs installed. The SCGs are located in the upper rear
of the chassis, above the T-CBs and Routing Engines. Each SCG weighs approximately
1.9 lb (0.9 kg).
To remove the SCGs (see Figure 55 on page 100):
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 an approved site ESD grounding point. See the instructions for your site.
Loosen the captive screws on the edges of the SCG faceplate.
3.
Grasp the SCG by the handle on the faceplate, and slide it out of the chassis.
4.
Place the SCG on the antistatic mat.
5.
Repeat the procedure for the second SCG.
6.

Figure 55: Removing an SCG

The rear fan tray is mounted vertically on the right side of the rear of the chassis. The fan
tray weighs about 10 lb (4.5 kg).
To remove the rear fan tray (see Figure 56 on page 101):
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