Removing an MX240 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.For more information about ESD, see Preventing Electrostatic Discharge Damage to an MX240 Router.
- 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
