Juniper EX4400 - Page 209

Install a Power Supply in an EX4400 Switch | 203
Remove a Power Supply from an EX4400 Switch
Before you remove a power supply from an EX4400 switch:
• Ensure that you have taken the necessary precauons to prevent electrostac discharge (ESD)
damage (see Prevenon of Electrostac Discharge Damage ).
• Ensure that you have the following parts and tools available:
• Number 2 Phillips (+) screwdriver—not provided
• An anstac bag or an anstac mat—not provided
• An ESD grounding strap—not provided
• A replacement power supply
We ship EX4400 switches with one AC or DC power supply preinstalled in the rear panel. Each power
supply is a hot-removable and hot-insertable eld-replaceable unit (FRU) when the second power supply
is installed and running: You can remove and replace either one of them without powering o the switch
or disrupng switch funcons.
CAUTION: Replace the power supply with a new power supply within one minute of
removal to prevent chassis overheang.
To remove a power supply:
1. Place the anstac bag or the anstac mat on a at, stable surface.
2. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end
of the strap to a site ESD point.
NOTE: If only one power supply is installed in your EX4400, you need to power o the switch
before removing the power supply.
3. Disconnect power to the switch:
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