1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to an approved site ESD grounding point. See the instructions for your site.
2. Switch the circuit breakers on the two-input 160-A, three-input 240-A, or four-input
240-A power supply faceplate to the off position (O), or switch the power switch on
the six-input DC power supply to the standby position. We recommend this even
though the power supplies are not connected to power sources.
3. Loosen the captive screws on the lower corners of the power supply faceplate
completely. Twist the ejector handles on the upper corners of the faceplate
counterclockwise to unseat the power supply.
4. Twist the ejector handles on the upper corners of the faceplate counterclockwise to
unseat the power supply.
5. Grasp the handle on the power supply faceplate and pull firmly to start removing the
power supply. Slide it halfway out of the chassis (see Figure 64 on page 172).
CAUTION: Be prepared to support the full weight of the power supply as
you remove it from the router.
6. Place one hand underneath the power supply to support it and slide it completely out
of the chassis.
7. Repeat the procedure for the other power supply.
8. Attach the installation handle by tightening the captive screws of the handle into the
holes previously occupied by the captive screws of the power supplies (see
Figure 65 on page 173).
191Copyright © 2017, Juniper Networks, Inc.
Chapter 19: Installing the T640 Router Without a Mechanical Lift
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