To remove a DC power supply (see Figure 62 on page 172):
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect
the strap to one of the ESD points on the chassis. Verify that the router is attached to
a proper earth ground.
2. Press the power switch for the power supply (located on the power supply faceplate)
to the OFF (O) position.
NOTE: If you are power cycling the power supply rather than shutting it
off for a time, wait at least 60 seconds after turning it off before turning
it back on. If you need to power it off again, wait for at least 60 seconds
after powering it on.
3. Shut off the power flowing to the power supply from the external power source, so
that the voltage across the leads of the power cables is 0 V. Ensure that there is no
chance that the cable leads might become active during the procedure.
4. Using a number 1 Phillips screwdriver, turn the screw on each field-wiring terminal
counter-clockwise to loosen the terminal connector from around the cable lug.
5. Remove the cables from the terminal connectors and from the hook located on the
faceplate to the right of the field-wiring terminals.
6. Loosen the thumbscrew at each corner of the power supply faceplate, using a Phillips
screwdriver if necessary.
7. Grasp the handle on the power supply faceplate and pull firmly to slide the unit about
halfway out of the chassis.
8. Place one hand under the power supply to support it, then slide it completely out of
the chassis.
Figure 62: Removing a DC Power Supply
Copyright © 2019, Juniper Networks, Inc.172
M7i Multiservice Edge Router Hardware Guide
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