Removing A Dc Power Supply From An Ex4550 Switch - Juniper EX4550 Hardware Manual

EX4550 Switch Hardware Guide

Removing a DC Power Supply from an EX4550 Switch

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The power supply in EX4550 switches is a hot-removable and hot-insertable
field-replaceable unit (FRU) installed in the rear panel of the switch: You can remove
and replace it without powering off the switch or disrupting switch functions.
Before you begin removing a power supply from the switch:
Ensure you understand how to prevent electrostatic discharge (ESD) damage. See
"Prevention of Electrostatic Discharge Damage" on page
Ensure that you have the following parts and tools available to remove the power supply
from the switch chassis:
ESD grounding strap
Phillips (+) screwdriver, number 2
An antistatic bag or an antistatic mat
Replacement power supply or a cover panel for the power supply slot
CAUTION: We recommend that you install either a replacement power supply
or a cover panel in the empty power supply slot to avoid chassis overheating
and dust accumulation.
To remove a power supply from the switch (see
Place the antistatic bag or the antistatic mat on a flat, stable surface.
1.
Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD
2.
point on the chassis.
Make sure that the voltage across the DC power source cables leads is 0 V and that
3.
there is no chance that the cables might become active during the removal process.
Remove the plastic cover from the input terminals by sliding the cover either to the
4.
left or right.
Unscrew the locking screws counterclockwise by using the screwdriver.
5.
Remove the cable lugs from the input DC terminals.
6.
Slide the ejector lever toward the left until the power supply is unseated.
7.
Grasp the power supply handle and pull firmly to slide the power supply halfway out
8.
of the chassis.
289.
Figure 69 on page 205):
Copyright © 2017, Juniper Networks, Inc.