System Power Supply; Figure 4-10. System Power-Supply Removal - Dell OptiPlex GXa Service Manual

4-12 Dell OptiPlex GXa and OptiPlex NX Systems Service Manual
S
ystem Power Supply
power supply
power-supply
mounting screw

Figure 4-10. System Power-Supply Removal

To remove the system power supply, follow these steps:
1. Disconnect the AC power cable from the back of the power supply.
2. Disconnect the DC power cables from the system board and the drives.
3. Remove the power-supply mounting screw at the back of the chassis.
4. Slide the system power supply forward until it stops; then lift it from
the chassis.
When you replace the system power supply, place it down inside the chassis and
against the right side of the chassis. Then slide the system power supply toward
the back of the chassis, and hook the tabs into the right side of the power supply.
WARNING: The voltage select switch, located on the back of the power
supply assembly, must be set to the correct operating voltage (115 V or
230 V) before the power cable is plugged into an AC outlet.
NOTE: When replacing the power supply on an enhanced manageability
system, ensure that the replacement power supply is an EM power supply.