Replacing Fan Trays - Juniper E SERIES BROADBAND SERVICES ROUTERS 11.3.X - E120 AND E320 HARDWARE GUIDE REV 9-29-2010 Hardware Manual

Replacing Fan Trays

Copyright © 2010, Juniper Networks, Inc.
Obtain an antistatic container for the NVS card you plan to remove. (See "Storing
1.
Modules and Components" on page 67.)
Be sure you have halted the SRP module using the halt command. See "Upgrading a
2.
System That Contains One SRP Module" on page 69.
With a small flathead screwdriver, remove the faceplate from the NVS card slot on
3.
the SRP module.
Eject the NVS card. (See Figure 29 on page 71.)
4.
Slot 0—Insert a paperclip or similar device in the hole beneath slot 0 to eject the
NVS card.
Slot 1—Use a screwdriver or similar device to depress the button beneath slot 1 and
eject the card.
Figure 29: NVS Card Slots and Eject Buttons
Remove the NVS card and place it in the antistatic container.
5.
Insert the new NVS card into the slot and push it until it clicks into place.
6.
Replace the faceplate on the NVS card slot.
7.
A tray of cooling fans provides forced air cooling for components in the router. The fan
tray is hot-swappable; you can replace it without powering down the system. However,
if you do not replace the fan tray within 60 seconds, the system enters thermal protection
mode. For information about thermal protection mode, see "Monitoring Temperatures
of Modules" on page 83. You can monitor fan status by observing the LEDs on the SRP
module or on the fan tray behind the faceplate. For complete LED information, see
"Understanding Status LEDs to Troubleshoot" on page 78.
Chapter 8: Maintaining the Router
71