Removing A Dc Power Supply From An Ex4500 Switch - Juniper EX4500 Hardware Manual

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Removing a DC Power Supply from an EX4500 Switch

Copyright © 2017, Juniper Networks, Inc.
Removing a DC Power Supply from an EX4500 Switch on page 189
Connecting DC Power to an EX4500 Switch on page 144
DC Power Supply in EX4500 Switches on page 42
Rear Panel of an EX4500 Switch on page 18
The power supply in EX4500 switches is a hot-removable and hot-insertable
field-replaceable unit (FRU): 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 ESD damage. See
Discharge Damage" on page
Ensure that you have the following parts and tools available to remove the power supply
from the switch chassis:
Electrostatic discharge (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: Do not leave the power supply slot empty for a long time while
the switch is operational. Either replace the power supply promptly or install
a cover panel over the empty slot.
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 electrostatic discharge (ESD) grounding strap to your bare wrist, and
2.
connect the strap to the ESD 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 using the screwdriver.
5.
281.
Figure 59 on page
Chapter 18: Replacing Power Supply
"Prevention of Electrostatic
190):
189