Juniper-networks J4350 Manual de usuario descargar pdf (Pagina 183)

Replacing and Troubleshooting Hardware Components

CAUTION: Th ere is no standard color coding for DC power cables. The color coding

used by the exte

rnal DC power source at your site dete rmines the color coding

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

supply. You m u st ensure that power connections ma in tain the proper polarity. The

power source c

ables might be labeled

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

5. Remove the p ower cable from the DC power source.

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

terminal block.

7. Within the terminal block, remove the screw that fastens the p ower cable

lug to the terminal block.

8. Carefullymovethepowercableoutoftheway.

9. Using the rem

oved screw, secure the replacement power cable to the

appropriate termina l. Tighten the screw until snug . Do not overtighten.

The screw con

tains a captive washer used to secure the power cable lug to

the t erminal block.

NOTE: Each power supply must be connected to a dedicated DC power feed. For

information about conn ectin g to DC power sources, see “Connecting Power”

on page 86.

10. Dress the power cable appropriately.

11 . Replace the clear plastic cover over the terminal b lock.

12. Verify th at t

he power cable does not block access to router c omponents or

drape w here people might trip on it.

13. Press and re

lease the power button to power on the router. Veri fy that the

POWER LED lights steadily after you press the power button.

Removing a DC Power Supply from a J6350 Router

The power supplies are located at the right rear of the cha ssis. A

power supply weighs 2.4 lb (1.1 kg).

To remove a DC power supply from a J6350 Services Router (see Figure 49):

1. Attach an electrostatic discharge (ESD) grounding stra p to your bare wrist and

connect the

strap to the ESD p oint on the chassis, or to an outside ESD point if

Replacing Hardware Components 163

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Juniper-networks J4350 Manual de usuario Pagina 183