Juniper BT8A78CH1, Hardware Overview And Installation Manual

Page: 180 / 228

•
Always wear an ESD grounding device, such as an ESD wrist strap, when handling a
module.
• Do not remove a module from its antistatic bag until installation. Store removed
modules in antistatic packaging.
•
If you need to set a module down, place it back into its antistatic packaging or on a
properly-grounded antistatic mat.
• Handle the module by its edges and/or its faceplate and avoid touching any pins, leads,
or solder connections on the circuit board.
•
Replacing the BTI7814 DC PEM on page 180
• Replacing the BTI7814 AC PEM on page 182
• Replacing the BTI7814 CAP on page 187
•
Replacing a BTI7814 FAN3 on page 188
•
Replacing a BTI7814 Booster Fan on page 189
• Performing a First Time Installation of the BTI7814 Booster Fans on page 190
• Replacing a BTI7814 Air Filter on page 191
Replacing the BTI7814 DC PEM
Use this procedure to remove and replace the 14-Slot Chassis DC Power Entry Module
(DC PEM) on the BTI7814 chassis.
The DC PEM that you are replacing must be disconnected from its power source. The
other DC PEMs can remain powered.
WARNING:
Ensure that you are familiar with the safety and electrical warnings
described in
“BTI7814 Field-Replaceable Units (FRUs)” on page 179 .
•
•
Ensure that the plastic shields are in place over the other DC PEMs, and
that there is no exposed wiring.
Tools Required
• Number 2 Phillips screwdriver
• 10 mm nut driver
•
Multimeter
Copyright © 2019, Juniper Networks, Inc. 180
BTI7800 Series Hardware Overview and Installation Guide