Removing A Dc Power Supply - Juniper M10i Hardware Manual

Removing a DC Power Supply

The DC power supplies are located at the bottom rear of the chassis, as shown in
. For information about power supply redundancy and replaceability, see
Figure 2
on page 19.
"Power Supplies"
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 a DC power supply, follow this procedure (see
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and
1.
connect the strap to one of the ESD points on the chassis. Make sure the router
is attached to a proper earth ground. For more information about ESD, see
"Preventing Electrostatic Discharge Damage"
Press the power switch for the power supply (located on the power supply
2.
faceplate) to the (
OFF
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.
Shut off the power flowing to the power supply from the external power source,
3.
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.
Using a number 1 Phillips screwdriver, turn the screw on each field-wiring
4.
terminal counter-clockwise to loosen the terminal connector from around the
cable lug.
Remove the cables from the terminal connectors and from the hook located on
5.
the faceplate to the right of the field-wiring terminals.
Loosen the thumbscrew at each end of the power supply faceplate, using a Phillips
6.
screwdriver if necessary.
Grasp the handle on the power supply faceplate and pull firmly to slide the unit
7.
about halfway out of the chassis.
Place one hand under the power supply to support it, then slide it completely
8.
out of the chassis.
Chapter 13: Replacing Hardware Components
on page 140.
) position.
O
Replacing Power System Components
):
Figure 41
113