Juniper EX9253 Hardware Manual page 23

• Air filter
• Line cards
• Transceivers
The fan trays and power supplies are hot-removable and hot-insertable field-replaceable units installed
in the rear panel of the switch. You can replace them without powering off the switch or disrupting
switch functions. In a switch powered by AC power supplies, a minimum of two high line power supplies
or three low line must be installed in the switch for non-redundant operation. To ensure proper
operation of the switch, you must install a replacement power supply shortly after removing a power
supply from the chassis. To maintain proper cooling, you must install a replacement fan tray or a blank
panel in the fan tray slot shortly after removing a fan tray from the chassis.
NOTE: If you have a Juniper J-Care service contract, register any addition, change, or upgrade of
hardware components at
Failure to do so can result in significant delays if you need replacement parts. This note does not
apply if you replace existing components with the same type of component.
To install a Routing and Control Board in an EX9253 switch, follow instructions in
Engine in an EX9253 Switch" on page
switch, follow instructions in
To install an AC power supply in an EX9253 switch, follow instructions in
in an EX9253 Switch" on page
instructions in "Removing an AC Power Supply from an EX9253 Switch" on page
To install a DC power supply in an EX9253 switch, follow instructions in
in an EX9253 Switch" on page
instructions in "Removing a DC Power Supply in an EX9253 Switch" on page
To install a fan tray in an EX9253 switch, follow instructions in
Switch" on page 112. To remove a fan tray from an EX9253 switch, follow instructions in
Fan Tray from an EX9253 Switch" on page
To install the air filter unit in an EX9253 switch, follow instructions in
EX9253 Switch" on page
"Removing the Air Filter Unit from an EX9253 Switch" on page
To install the air filter in the air filter unit in an EX9253 switch, follow instructions in
Filter in the Air Filter Unit in an EX9253 Switch" on page
unit in an EX9253 switch, follow instructions in
EX9253 Switch" on page
https:/ /www.juniper.net/customers/support/tools/updateinstallbase/
134. To remove a Routing and Control Board from an EX9253
"Removing a Routing Engine from an EX9253 Switch" on page
125. To remove an AC power supply from an EX9253 switch, follow
129. To remove a DC power supply from an EX9253 switch, follow
111.
117. To remove the air filter unit from an EX9253 switch, follow instructions in
"Removing the Air Filter from the Air Filter Unit in an
118.
"Installing an AC Power Supply
"Installing a DC Power Supply
127.
"Installing a Fan Tray in an EX9253
"Installing the Air Filter Unit in an
116.
120. To remove the air filter from the air filter
.
"Installing a Routing
132.
124.
"Removing a
"Installing the Air
14