Juniper Networks Hardware Manual page 212

M120 Multiservice Edge Router Hardware Guide
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Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
3.
the strap to one of the ESD points on the chassis.
Switch the circuit breaker on the power supply faceplate to the off position (
4.
Remove the power cable from the DC power source.
5.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
6.
Remove the nut and washer from the terminal studs (see "Disconnecting Power
7.
Cables from the DC Power Supply" on page 178). (Use a 3/8–in. nut driver or pliers.)
Remove the cable lug 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 cable out of the way.
10.
Attach the lug on the replacement power cable to the terminal studs, making sure
11.
the cable is not touching or in the way of any router components.
Secure the power cable lugs to the terminal studs, first with the flat washer, then with
12.
the nut. Apply between 12 lb-in. (1.4 Nm) and 15 lb-in. (1.7 Nm) of torque to each nut,
(see "Connecting Power Cables to the DC Power Supply" on page 180
Route the power cable through the cable restraint.
13.
Tighten the cable restraint captive screw to hold the power cable in place.
14.
Replace the clear plastic cover over the terminal studs on the faceplate.
15.
Attach the power cable to the DC power source.
16.
Verify that the DC source power cabling is correct, that the cables are not touching or
17.
blocking access to router components, and that they do not drape where people could
trip on them.
Switch the power switch on the power supply faceplate to the on position (
18.
that the status LED on the power supply faceplate blinks, then lights steadily
approximately one minute after you switch on the power switch.
M120 DC Power Supply Description on page 31
Electrical Specifications for the M120 DC Power Supply on page 233
Maintaining the M120 Power Supplies on page 115
O
). Verify
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).