Removing a DC Power Supply from an EX8200 Switch

The DC power supply in an EX8200 switch is a hot-removable and hot-insertable field-replaceable unit (FRU). You remove DC power supplies from the front of the chassis.

Note: EX8208 switches support 2000 W DC power supplies. EX8216 switches support 3000 W DC power supplies.

Caution: Before you remove a power supply, ensure that you have power supplies sufficient to power the switch left in the chassis. See Calculating Power Requirements for an EX8208 Switch and Calculating Power Requirements for an EX8216 Switch.

Before you remove a DC power supply from the switch:

• Ensure that you understand how to prevent ESD damage. See Prevention of Electrostatic Discharge Damage.

Ensure that you have the following parts and tools available to remove a DC power supply from an EX8200 switch chassis:

• Electrostatic discharge (ESD) grounding strap
• Phillips (+) screwdriver, number 1
• Phillips (+) screwdriver, number 2
• 3/8 in. (9.5 mm) nut driver or socket wrench
• Replacement power supply or cover panel for the power supply slot

Caution: Do not leave the power supply slot empty for a long time while the switch is operational. Either replace the power supply unit promptly or install a cover panel over the empty slot.

To remove a DC power supply from an EX8200 switch (see Figure 2):

1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
2. Make sure that the voltage across the DC power source cables leads is 0 V and that there is no chance that the cables might become active during the removal process.
3. Flip the Enable switch on the power supply to the Standby position.
4. Unscrew the screw counterclockwise using the Phillips (+) screwdriver, number 2, on each of the plastic cable covers that shield the input terminal studs.
5. Remove the plastic cable covers from both pairs of input terminal studs. See Figure 1.

   Figure 1: Remove the Plastic Cable Cover

   
6. Unscrew the nuts counterclockwise using the 3/8 in. (9.5 mm) nut driver or socket wrench from the input terminal studs.
7. Remove the cable lugs and washers from the input terminal studs.
8. Unscrew the captive screw counterclockwise using the Phillips (+) screwdriver, number 1.
9. Pull the captive screw away from the faceplate of the power supply to release the latch.
10. Pull the handle away from the faceplate of the power supply until it is perpendicular to the faceplate.
11. Taking care not to touch power supply components, pins, leads, or solder connections, place one hand under the power supply to support it. Grasp the power supply handle with your other hand and pull the power supply completely out of the chassis.
12. If you are not replacing the power supply, install the cover panel over the slot, using the Phillips (+) screwdriver to tighten the screw on the side of the cover panel.

Figure 2: Removing a DC Power Supply from an EX8200 Switch