Replacing An Mx2020 Ac Power Supply Module; Removing An Mx2020 Ac Power Supply Module - Juniper MX2020 Hardware Manual

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Replacing an MX2020 AC Power Supply Module

Copyright © 2013, Juniper Networks, Inc.
Reinstall the metal PDM wiring cover, and using a number 2 Phillips (+) screwdriver,
12.
tighten the four captive screws on the metal AC wiring compartment.
Verify that the AC power cord is not touching or blocking access to router components,
13.
and that it does not drape where people could trip on it.
Remove the ESD grounding strap from the ESD points on the chassis. Connect the
14.
strap to an approved site ESD ground point. See the instructions for your site.
Connect the AC power cord plug to the power source.
15.
Switch on the customer site circuit breakers to provide voltage to the AC power cord.
16.
Remove the ESD grounding strap from the approved site ESD grounding point. See
17.
the instructions for your site. Reconnect the strap to one of the ESD points on the
chassis.
Verify the LED on the PDM faceplate is lit steadily, indicating that the AC terminal
18.
block is receiving power.
Switch the power switch on the PSM to the on position (
19.
router components.
NOTE: After a PDM is powered on, it can take up to 60 seconds for status
indicators—such as the LEDs on the PDM, the command output displays,
and messages on the LED display on the craft interface—to indicate that
the PDM is functioning normally. Ignore error indicators that appear during
the first 60 seconds.
Preventing Electrostatic Discharge Damage to an MX2020 Router on page 320
MX2020 Three-Phase Wye AC Power Distribution Module Description on page 44
MX2020 Three-Phase Delta and Wye AC Power Distribution Module LEDs on page 46
Replacing an MX2020 Three-Phase Wye AC Power Distribution Module on page 288
Troubleshooting the MX2020 Power Subsystem on page 202
MX2020 AC Power Cord Specifications on page 370
Removing an MX2020 AC Power Supply Module on page 301
1.
Installing an MX2020 AC Power Supply Module on page 303
2.

Removing an MX2020 AC Power Supply Module

Before you remove a PSM, be aware of the following:
CAUTION: To maintain proper cooling and prevent thermal shutdown of the
operating PSM, each PSM slot must contain either a PSM or a blank panel.
Chapter 13: Replacing MX2020 Router Hardware Components
) to provide power to the
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301