Juniper MX240 - UPGRADING Manual page 29

Copyright © 2010, Juniper Networks, Inc.
power supply or a blank panel. If you remove a power supply, you must install
a replacement power supply or a blank panel shortly after the removal.
NOTE: After powering off a power supply, wait at least 60 seconds before
turning it back on.
To remove a DC power supply (see Figure 14 on page 17):
Switch off the dedicated customer site circuit breaker for the power supply being
1.
removed. Follow your site's procedures for ESD.
Make sure that the voltage across the DC power source cable leads is 0 V and that
2.
there is no chance that the cables might become active during the removal process.
Verify that the
INPUT OK
3.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
4.
the strap to one of the ESD points on the chassis.
Move the DC circuit breaker on the power supply faceplate to the off (
5.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
6.
Remove the nut and washer from each of the terminal studs. (Use a 7/16-in.
7.
[11-mm] nut driver or socket wrench.)
Remove the cable lugs from the terminal studs.
8.
Loosen the captive screw on the cable restraint on the lower edge of the power supply
9.
faceplate.
Carefully move the power cables out of the way.
10.
While grasping the handle on the power supply faceplate with one hand, use your
11.
other hand to pull the spring-loaded locking pin in the release lever away from the
chassis and turn the release lever counterclockwise until it stops.
Let go of the locking pin in the release lever. Ensure that the pin is seated inside the
12.
corresponding hole in the chassis.
Pull the power supply straight out of the chassis.
13.
WARNING: Do not touch the power connector on the top of the power
supply. It can contain dangerous voltages.
LEDs on the power supply to be removed are not lit.
Removing an MX960 DC Power Supply
) position.
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