Juniper-networks J4350 Manual do Utilizador descarregar pdf (Página 184)

J4350 and J6350 Services Router Getting Started Guide

the router is disconnected from earth ground. For mo re i nformation about

ESD, see “Prev

enting Electrostatic Discharge Damage” on page 205.

2. Press and release the power button to power off the Services Router. Wait for

the

POWER LED t

oturnoff.

3. Ensure that the voltage across the DC power source cable leads is 0 V and that

the cable lead

scannotbecomeactiveduringinstallation.

CAUTION: Th er

e is no standard color coding for DC power cables. T he color coding

used by the external DC power source at your site determines the color coding

for the leads on the power cables that a ttach to the terminal studs on each power

supply. You m

ust ensure that power connections main tain the proper polarity. The

power source cables might be labeled

(+) and (–) to indi cate their polarity.

4. Remove the po

wercablesfromtheDCpowersource.

5. Use a Phillips screwdriver to remove the clear plastic cover protecting the

terminal bl o

ck.

6. Within the terminal block, remove the screws that fasten the p ower cable

lugs to the te

rminal block.

7. Carefully move the power cables out of the way.

8. Slide th e ejector tab on the power supply faceplate to the right, and hold it in

place to unlock the power supply.

9. Grasp the handle on the power supply faceplate, and pull firmly to start

removingthepowersupply.Slideithalfwayoutofthechassis(seeFigure49).

10. Place one hand underneath the power supply to support it, and slide it

completelyoutofthechassis.

11 . If you are not reinstalling a power supply into the emptied slot, install a blank

power supply panel over the slot.

164 Replacing Hardware Components

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Juniper-networks J4350 Manual do Utilizador Página 184