Replacing A T4000 Scg; Removing A T4000 Scg - Juniper T4000 Hardware Manual

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Replacing a T4000 SCG

Removing a T4000 SCG

Copyright © 2013, Juniper Networks, Inc.
Grasp the DIMM module by the edges, being careful not to touch any electrical
4.
components.
Press firmly on both ends, and push the module into the slot until the ejectors return
5.
completely to the closed position.
Install the Routing Engine. See
6.
You can view the SDRAM configuration and verify that the DIMM was installed correctly
7.
by issuing the
show chassis routing-engine
T4000 Routing Engine Description on page 39
T4000 RE-C1800 Routing Engine Description on page 40
T4000 RE-C1800 LEDs on page 41
T4000 Craft Interface LEDs on page 25
Preventing T4000 Electrostatic Discharge Damage on page 296
Removing a T4000 SCG on page 277
1.
Installing a T4000 SCG on page 278
2.
The router can have one or two SCGs installed. The SCGs are located in the upper rear
of the chassis, above the control boards and Routing Engines. Each SCG weighs
approximately 1.9 lb (0.9 kg).
A nonredundant SCG is hot-pluggable. For redundant SCGs, the master SCG is
hot-pluggable. The backup SCG is hot-removable and hot-insertable if the master SCG
is functioning. Removing the backup SCG does not affect the functioning of the router.
Taking the master SCG offline might result in a brief loss of SONET clock lock while the
backup SCG becomes the master.
To remove an SCG (see Figure 132 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 SCG faceplate, and hold it down until the LED
3.
goes out (about 5 seconds).
Loosen the captive screws on the edges of the SCG faceplate.
4.
Grasp the SCG by the handle on the faceplate, and slide it out of the chassis.
5.
Place the SCG on the antistatic mat.
6.
Chapter 19: Replacing T4000 Router Hardware Components
"Replacing a T4000 Routing Engine" on page
command.
278):
267.
277