Removing an MX480 AC Power Supply
Before you remove a power supply, be aware of the following:
 | Note: The minimum number of power supplies must be present in the router at all times. |
 | Caution: To maintain proper cooling and prevent thermal shutdown of the operating power supply unit, each power supply slot must contain either a power supply or a blank panel. If you remove a power supply, you must install a replacement power supply or a blank panel shortly after the removal. |
| Note: After powering off a power supply, wait at least 60 seconds before turning it back on. |
To remove an AC power supply (see Figure 1):
- Switch off the dedicated customer site circuit breaker for the power supply, and remove the power cord from the AC power source. Follow the instructions for your site.
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- Move the AC input switch next to the appliance inlet on the power supply to the off (O) position.
- Remove the power cord from the power supply.
- Unscrew the captive screws on the bottom edge of the power supply.
- Pull the power supply straight out of the chassis.
Figure 1: Removing an AC Power Supply
