AT&T MERLIN LEGEND Release 3.0 Installation Manual page 389

Power Supply Problems
To replace the power supply module, follow the steps below and refer to Figure
4-3.
1 Insert a new power supply.
a Reinstall the power supply module by hooking the top into the basic carrier
and then swinging it down into place. Push the lower end firmly until the
locking tab clicks.
b Replace the ferrite cores around the AC power cord and ground wire and
slide the ferrite cores between the wire manager and the power supply
module.
c Attach the ground wire to the grounding screw.
2 For each power supply and auxiliary power unit, connect the AC power
cord to the connector marked AC INPUT on the power supply.
3 Plug the other end of each AC power cord into the AC outlet.
4 Power up the system by turning on the components listed below in the
order given.
a Power supply on each expansion carrier
b Power supply on the basic carrier
The system automatically cold starts.
CAUTION:
Do not plug the power supply or the auxiliary power unit into the AC
outlet until you are ready to turn on the system, as described in
"Powering Up the System" in Chapter 2 of Installation.
Do not attach the power cord(s) to any building surfaces.
Control Unit Problems 4-11