Juniper MX240 Hardware Manual page 135

user@host>request chassis fpc slot slot-number offline
For more information about the command, see the JUNOS System Basics and
Services Command Reference.
Disconnect the cables from the DPC. If the DPC uses fiber-optic cable,
5.
immediately cover each transceiver and the end of each cable with a rubber
safety cap. Arrange the disconnected cables in the cable management system
to prevent the cables from developing stress points.
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.
CAUTION: Avoid bending fiber-optic cable beyond its minimum bend radius. An arc
smaller than a few inches in diameter can damage the cable and cause problems
that are difficult to diagnose.
Simultaneously turn both of the ejector handles counterclockwise to unseat the
6.
DPC.
Grasp the handles and slide the DPC straight out of the card cage halfway.
7.
Place one hand around the front of the DPC and the other hand under it to
8.
support it. Slide the DPC completely out of the chassis, and place it on the
antistatic mat or in the electrostatic bag.
CAUTION: The weight of the DPC is concentrated in the back end. Be prepared to
accept the full weight—up to 13.1 lb (5.9 kg)—as you slide the DPC out of the chassis.
When the DPC is out of the chassis, do not hold it by the ejector handles, bus bars,
or edge connectors. They cannot support its weight.
Do not stack DPCs on top of one another after removal. Place each one individually
in an electrostatic bag or on its own antistatic mat on a flat, stable surface.
If you are not reinstalling a DPC into the emptied DPC slot within a short time,
9.
install a blank DPC panel over the slot to maintain proper airflow in the DPC
card cage.
Chapter 13: Replacing Hardware Components
Replacing DPCs and Transceivers
107