Lenovo ThinkCentre 7515 Hardware Maintenance Manual page 103

3. Lay the computer on its side and remove the four screws at the rear of the
chassis that secure the power supply assembly.
Figure 15. Removing the retaining screws for the power supply assembly
4. Remove the old power supply assembly from the chassis.
5. Ensure that the power supply assembly is the correct replacement. Some power
supply assemblies automatically sense the voltage, some power supply
assemblies are voltage specific, and some power supply assemblies have a
voltage-selection switch. If your computer has a voltage-selection switch, ensure
that you set the voltage-selection switch of the new power supply assembly to
match the voltage available at your electrical outlet. If necessary, use a ballpoint
pen to slide the voltage-selection switch to a different position.
v If the voltage supply range in your local country or region is 100–127 V AC,
set the switch to 115 V.
v If the voltage supply range in your local country or region is 200–240 V AC,
set the switch to 230 V.
6. Install the new power supply assembly into the chassis so that the screw holes
in the power supply assembly align with those in the chassis.
7. Install the four screws to secure the power supply assembly.
Note: Use only screws provided by Lenovo.
8. Reconnect the power supply assembly connectors to the system board.
9. Reconnect a power supply assembly connector to each of the drives.
What to do next:
v To work with another piece of hardware, go to the appropriate section.
v To complete the replacement, go to "Completing the FRU replacement" on
page 120.
Chapter 8. Replacing FRUs - Tamdhu
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