Replacing An M120 Pic; Removing An M120 Pic - Juniper M120 Hardware Manual

Replacing an M120 PIC

Copyright © 2010, Juniper Networks, Inc.
PICs are hot-insertable and hot-removable. When you remove a PIC, the router continues
to function, although the PIC interfaces being removed no longer function. To replace a
PIC, perform the following procedures:
Removing an M120 PIC on page 161
Installing an M120 PIC on page 162

Removing an M120 PIC

The PICs are located in the FPCs installed in the front of the router. A PIC weighs less
than 2 lb (0.9 kg).
To remove a PIC (see Figure 81 on page 162):
Place an electrostatic bag or antistatic mat on a flat, stable surface to receive the
1.
PIC. If the PIC connects to fiber-optic cable, have ready a rubber safety cap for each
transceiver and cable.
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.
Use one of the following methods to take the PIC offline:
3.
Press and hold the PIC offline button until its failure indicator LED lights, which
usually takes about 5 seconds. The failure LED is usually red; for more information,
see the MX Series 3D Universal Edge Routers Line Card Guide. For the PICs that install
on an Type 1 FPCs, the offline button for each PIC is next to it on the FPC card carrier.
For the PICs that install on an Type 2 FPCs, the offline button is on the PIC faceplate.
Issue the CLI command:
user@host> request chassis pic fpc-slot fpc-slot pic-slot pic-slot offline
For more information about the command, see the Junos OS System Basics and
Services Command Reference.
Label the cables connected to the PIC so that you can later reconnect each cable to
4.
the correct PIC.
Disconnect the cables from the PIC. If the PIC uses fiber-optic cable, immediately
5.
cover each transceiver and the end of each cable with a rubber safety cap.
WARNING: Do not look directly into a fiber-optic transceiver or into the
ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable
connected to a transceiver emit laser light that can damage your eyes.
CAUTION: Do not leave a fiber-optic transceiver uncovered except when
inserting or removing cable. The safety cap keeps the port clean and
prevents accidental exposure to laser light.
Chapter 14: Replacing M120 Hardware Components
161