Juniper Networks ISG 2000 - Manuel (Page 47)

Installing Power Supplies
NetScreen-ISG 2000 41
3. Fasten the screws over the connectors.
4. Turn on the power switches.
Replacing a DC Power Supply
To replace one of the DC power supplies:
1. Loosen the three retaining screws on the terminal block.
2. Remove the feed wires.
3. Turn the thumbscrew counterclockwise to release the power supply.
4. Lift the handle and, gripping the handle, pull the power supply straight out.
5. Insert the new power supply into the bay.
6. Secure the power supply in place by tightening the thumbscrew clockwise.
7. Turn on the power supply.
Reconnect the wires as explained in “Wiring the DC Power Supplies” on page 40 .
Replacing an AC Power Supply
To replace an AC power supply:
1. Turn off the power supply.
2. Unplug the cord from the power supply.
3. Turn the thumbscrew counterclockwise to release the power supply.
4. Lift the handle and, gripping the handle, gently pull the power supply straight
out.
5. Insert the new power supply into the bay.
6. Secure it in place by tightening the thumbscrews clockwise.
7. Plug the power cord into the power supply.
8. Turn on the power supply.
Note: If there are multiple power supplies in the NetScreen-ISG 2000 and any of
them are off, the Alarm LED on the management module glows red. This
warning indicates that maximum system stability requires all installed power
supplies to be operational.
Warning: You must shut off current to the DC feed wires leading to the power supply that
you want to replace. Also, make sure that the ON/OFF switch on the power supply is in the
off position.