Juniper Networks J4350, J6350 manual Removing a DC Power Supply

Chapter 10: Replacing Hardware Components

CAUTION: You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (–)to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each power supply.

5.Remove the power 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 power cable lug to the terminal block.

8.Carefully move the power cable out of the way.

9.Using the removed screw, secure the replacement power cable (see 1) to the appropriate terminal. Tighten the screw until snug. Do not overtighten.

The screw contains a captive washer used to secure the power cable lug to the terminal block.

NOTE: Each power supply must be connected to a dedicated DC power feed. For information about connecting to DC power sources, see “Connecting

Power” on page 124.

10.Dress the power cable appropriately.

11.Replace the clear plastic cover over the terminal block.

12.Verify that the power cable does not block access to router components or drape where people might trip on it.

13.Press and release the power button to power on the router. Verify that the POWER LED lights steadily.

Removing a DC Power Supply

The power supplies are located at the right rear of the chassis. A power supply weighs 2.4 lb (1.1 kg).

To remove a DC power supply (see Figure 93 on page 196):

1.Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to the ESD point on the chassis, or to an outside ESD point if the router is disconnected from earth ground. For more information about ESD, see “Preventing Electrostatic Discharge Damage” on page 251.

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

3.Ensure that the voltage across the DC power source cable leads is 0 V and that the cable leads cannot become active during installation.

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