Juniper EX4500-40F-BF, Complete Hardware Manual, Page: 198 / 294

Replacing the Power Supply in the Top Slot
To replace the power supply in the top slot of the switch:
1.
Ensure that the EX4500 switch you are working on is operating normally, with both
power supplies turned on, by verifying that the LED on each power supply is lit steadily
green. See
Figure 60 on page 180 .
Figure 60: Verify Green Power Supply LEDs for Normal Operation
g020809
AC power
supply LEDs
2.
Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD
point on the lower right front of the chassis—or touch the exposed, bare metal of the
switch to ground yourself before handling a component.
3.
To remove AC power from the old power supply:
a. Identify the AC power source outlet that is powering the old power supply.
b. If the AC power source outlet has an on/off switch, set it to the OFF (0) position.
c. Gently pull the male end of the power cord for the old power supply out of the AC
power source outlet.
4.
To remove the power supply cord from the old power supply:
a. On the power supply, turn the adjustment nut of the power cord retainer clockwise
until you can see the power cord.
b. Pull the power cord out of the slot in the adjustment nut.
c. Unplug the power cord from the AC appliance inlet on the power supply. Save the
cord.
d. Remove the power cord retainer clip by pushing it to one side, squeezing both sides
of the clip, and pulling it completely out of the power supply. Save the clip.
5.
To remove the old power supply from the switch (see Figure 61 on page 181 ):
a. Unseat the power supply by pressing the orange or green ejector lever next to the
AC appliance inlet.
b. Grasp the power supply handle and pull firmly, keeping one hand under the power
supply to support it as you slide it out of the chassis.
Copyright © 2015, Juniper Networks, Inc. 180
Complete Hardware Guide for EX4500 Ethernet Switches