Lenovo ThinkStation C20x 4269 Hardware Manual page 144

10. Install and tighten the four screws at the rear of the chassis to secure the
11. Install and tighten the 2 screws that secure the power supply to the inside of
12. Check the power supply and ensure it is the correct replacement. Some power
13. Replace the heat sink.
14. Reconnect the heat sink fan cable.
15. Reconnect all the power supply cables to the drives and the system board.
16. Go to "Completing the FRU replacement" on page 158.
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Hardware Maintenance Manual
9. 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.
Note: Use only the screws provided by Lenovo.
power-supply assembly.
the chassis.
supplies auto sense the voltage, some power supplies are voltage specific, and
some power supplies have a voltage selection switch. Use a ballpoint pen to
slide the switch, if necessary.
Note: For models that have a switch:
v If the voltage supply range is 100–127 V ac, set the switch to 115 V.
v If the voltage supply range is 200–240 V ac, set the switch to 230 V.
Note: You can reuse the heat sink without replacing the grease as long as the
grease on the heat sink or the microprocessor has not been disturbed or
contaminated. Be careful not to touch the heat sink or set the heat sink
down to prevent the grease from coming in contact with any surface or
contaminates.