Juniper EX4200 Hardware Manual page 196

To remove a power supply from the switch (see
1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
2. Disconnect power to the switch by performing one of the following:
AC power supply—If the AC power source outlet has a power switch, set it to the OFF (0) position.
If the AC power source outlet does not have a power switch, gently pull out the male end of the
power cord connected to the power source outlet.
DC power supply—Switch the circuit breaker on the panel board that services the DC circuit to the
OFF position.
3. Remove the power source cable from the power supply faceplate:
AC power supply—Gently pull out the female end of the power cord connected to the power supply
faceplate.
DC power supply—Remove the screws securing the ring lugs attached to the power source cables
to the power supply using the screwdriver, and remove the power source cables from the power
supply. Replace the screws on the terminals and tighten them.
4. Loosen the locking lever screw on the left front of the power supply by using the screwdriver.
5. Push down on the locking lever until it is in its lowest position.
6. Grasp the power supply handle and pull firmly to slide it halfway out of the chassis.
7. Place one hand under the power supply to support it and slide it completely out of the chassis. Take
care not to touch power supply components, pins, leads, or solder connections.
8. Place the power supply in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
Figure 57: Removing a Power Supply from the Switch
Figure 57 on page 196):
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