Lenovo System x3550 M4 Installation And Service Manual page 85

power cable. The customer is responsible for ensuring that only trained service personnel install or remove
the -48 volt power cable.
Step 1. Read the safety information that begins on "Safety" on page v and "Installation guidelines" on page
31.
Step 2. Touch the static-protective package that contains the hot-swap power supply to any unpainted
metal surface on the server; then, remove the power supply from the package and place it on a
static-protective surface.
Step 3. Turn off the circuit breaker for the dc power source to which the new power supply will be
connected. Disconnect the power cord from the dc power source.
Step 4. Attach the dc power cable to the new power supply.
Figure 56. DC power supply rear view
Step 5. If you are installing a hot-swap power supply into an empty bay, remove the power-supply filler
from the power-supply bay.
Figure 57. Power supply installation
Step 6. Grasp the handle on the rear of the power supply and slide the power supply forward into the
power-supply bay until it clicks. Make sure that the power supply connects firmly into the power-
supply connector.
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Chapter 2 Installing optional devices
71