Replacing An M10I Ac Power Supply; Removing An M10I Ac Power Supply - Juniper M10i Hardware Manual

Replacing an M10i AC Power Supply

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An AC-powered router has up to three load-sharing AC power supplies. The router must
have at least two AC power supplies, and any two AC power supplies can provide full
power to the router. Three power supplies are required for redundancy. A redundant
power supply is hot-removable and hot-insertable, as described in "M10i Field-Replaceable
Units (FRUs)" on page 99. For M10i routers with only two AC power supplies, you must
power off the router before replacing an AC power supply.
Removing an M10i AC Power Supply on page 121
1.
Installing an M10i AC Power Supply on page 122
2.

Removing an M10i AC Power Supply

The AC power supplies are located at the bottom rear of the chassis, as shown in "M10i
Chassis Description" on page 5. For information about power supply redundancy and
replaceability, see "M10i Power System Description" on page 24.
CAUTION: Do not leave a power supply slot empty for more than a short time
while the router is operational. The power supply must remain in the chassis
for proper airflow.
To remove an AC power supply (see Figure 47 on page 122):
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to one of the ESD points on the chassis.
Press the power switch on the power supply faceplate to the
2.
NOTE: If you are not removing the power supply, but simply powering it
off, wait at least 60 seconds before turning it back on. If you need to power
it off again, wait for at least 60 seconds after powering it on.
Unplug the AC power cord from the appliance inlet on the faceplate.
3.
Loosen the thumbscrew at each end of the power supply faceplate, using a Phillips
4.
screwdriver if necessary.
Grasp the handle on the power supply faceplate and pull firmly to slide the unit about
5.
halfway out of the chassis.
Place one hand under the power supply to support it, then slide it completely out of
6.
the chassis.
Chapter 15: Replacing M10i Hardware Components
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121