Reinstalling T640 Standard or Quiet Front Fan Trays
To reinstall the standard front fan trays (see Figure 91 on page 204):
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. Grasp one of the fan trays by its handles and insert it straight into the chassis.
3. Tighten the captive screw on each side of the fan tray faceplate to secure it in the
chassis.
4. Repeat the procedure to reinstall the remaining fan tray.
To reinstall the quiet front fan trays:
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. Locate the fan tray labeled FAN-T-FTOP-S UPPER FANTRAY.
3. Press the two latches located on each side of the quiet upper front fan tray up, and
insert the fan tray straight into the upper front fan tray slot (see Figure 89 on page 204).
4. Grasp the upper front fan tray by its handles and insert it straight into the upper fan
tray slot (see Figure 89 on page 204.
5. Tighten the captive screws on each side of the fan tray faceplate to secure it in the
chassis.
6. Locate the quiet lower fan tray labeled FAN-T-FBOT-S LOWER FANTRAY.
7. Press the two latches located on each side of the quiet lower front fan tray up, and
insert the fan tray straight into the lower front fan tray slot (see Figure 90 on page 204).
8. Tighten the captive screws on each side of the quiet lower front fan tray faceplate to
secure it in the chassis.
203Copyright © 2017, Juniper Networks, Inc.
Chapter 19: Installing the T640 Router Without a Mechanical Lift
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