Juniper MX10004 - Page 177

• Review how to prevent ESD damage. See "Prevenon of Electrostac Discharge Damage" on page
263.
• Ensure that you have the following parts and tools available to remove a fan tray from an MX10004:
• Electrostac discharge (ESD) grounding strap
• Replacement fan tray
• A Phillips (+) screwdriver (oponal), number 1 or 2, for the capve screws
NOTE: When replacing the fan trays or SFBs at 40° C chassis ambient temperature, ensure that
the fans run at 100% fan speed for at least 10 minutes before replacing the fans or SFBs.
Use the test chassis fan tray 0 speed full-speed and test chassis fan tray 1 speed full-speed
commands to set the chassis fans to 100% speed.
Aer replacing the fans or SFBs, set the fans to normal speed using the test chassis fan tray 0
speed normal and test chassis fan tray 1 speed normal command.
You install fan trays vercally on the rear of the chassis.
CAUTION: You can replace one fan tray while the router is operang. However, if you
remove both fan trays at the same me, you’ll trigger a thermal alarm and the system
will shut down. See Figure 69 on page 168.
To remove an MX10004 fan tray:
1. Wrap and fasten one end of the ESD grounding strap around your bare wrist and connect the other
end of the strap to one of the ESD points on the chassis (see Figure 67 on page 165).
2. Loosen the four capve screws either by hand or with a Phillips screwdriver.
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