Removing A T640 Standard Control Board Or T-Cb - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
260

Removing a T640 Standard Control Board or T-CB

CAUTION: Before you replace a control board, you must take the host
subsystem offline. If there is only one host subsystem, taking the host
subsystem offline shuts down the router. See
Subsystem Offline" on page
CAUTION: If the control board to be replaced is associated with the Routing
Engine currently functioning as the master Routing Engine, switch it to the
backup before removing the control board. See
Subsystem Offline" on page
To remove a standard control board or T-CB (see
Figure 144 on page 261):
Take the host subsystem offline. See
1.
page 256.
Place an electrostatic bag or antistatic mat on a flat, stable surface.
2.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
3.
the strap to one of the ESD points on the chassis.
For T-CBs in a T640 router connected to a TX matrix router, disconnect the cable
4.
plugged into the port labeled
Loosen the captive screws (using a Phillips (+) screwdriver, number 2) on the ejector
5.
handles on both sides of the control board faceplate.
Flip the ejector handles outward to unseat the control board.
6.
Grasp the ejector handles, and slide the control board about halfway out of the chassis.
7.
Place one hand underneath the control board to support it, and slide it completely
8.
out of the chassis.
Place the control board on the antistatic mat.
9.
If you are not replacing the control board now, install a blank panel over the empty
10.
slot.
"Taking the T640 Host
256.
256.
Figure 143 on page 261
"Taking the T640 Host Subsystem Offline" on
CIP .
Copyright © 2013, Juniper Networks, Inc.
"Taking the T640 Host
and