Replacing an M120 AC Power Supply Cord

To replace the power cord for an AC power supply:

1. Locate a replacement power cord with the type of plug appropriate for your geographical location (see M120 AC Power, Connection, and Power Cord Specifications).
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
3. Move the power switch on the power supply faceplate to the standby position.
4. Unplug the power cords from the power source receptacles.
5. Remove the cable restraint from the lower edge of the power supply faceplate by removing its retainer screw.
6. Remove the cable restraint from the power cord and save it so you can use it on the replacement power cord.
7. Unplug the power cord from the appliance inlet on the power supply faceplate.
8. Insert the appliance coupler end of the replacement power cord into the appliance inlet on the power supply faceplate.
9. Wrap the cable restraint around the power cord, then slide it along the power cord to a position that enables you to reinstall it in the power supply faceplate.
10. Reinstall the cable restraint by tightening its retainer screw part of the way into the power supply faceplate.
11. Carefully pull the AC power cords through the cable restraint until you have the desired amount of slack in the power cord.
12. Tighten the cable restraint retainer screw to hold the power cords in place.
13. Insert the power cord plugs into an AC power source receptacle. Verify that the power cord does not block access to router components or drape where people could trip on it.

    Note: Each AC power supply has two AC appliance inlets. Each power supply must be connected to a dedicated AC power feed. For 100-120 VAC, both inlets are used. For 200-240 VAC, only the top inlet is used. For information about site power preparations, see M120 Router Power Requirements. For information about connecting the router to power and ground, see Connecting Power to an AC-Powered M120 Router.

14. Switch the power switch on the power supply faceplate to the on position (|). Verify that the status LED on the power supply faceplate blinks, then lights steadily approximately one minute after you switch on the power switch.