Figure 23. Removing the heat sink fan duct

5.Disconnect the power supply assembly cables from all drives and from the 24-pin power connector and 4-pin power connector on the system board. See “Locating parts on the system board” on page 9.

Note: You might also need to release the power supply assembly cables from some cable clips or ties that secure the cables to the chassis. Make sure that you note the cable routing before disconnecting the cables.

6.At the rear of the computer, remove the three screws that secure the power supply assembly. Press the power supply clip 1 downward to release the power supply assembly and then slide the power supply assembly to the front of the computer. Lift the power supply assembly out of the computer.

Figure 24. Removing the power supply assembly

7.Make sure that the new power supply assembly is the correct replacement. Some power supply assemblies automatically sense the voltage or accept universal input, some power supply assemblies are voltage specific, and some power supply assemblies have a voltage-selection switch. If your power supply assembly has a voltage-selection switch, make sure that you set the voltage-selection switch to match the voltage available at your electrical outlet. If necessary, use a ballpoint pen to slide the voltage-selection switch to the correct position.

•If the voltage supply range in your local country or region is 100–127 V ac, set the voltage-selection switch to 115 V.

•If the voltage supply range in your local country or region is 200–240 V ac, set the voltage-selection switch to 230 V.

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Lenovo 7539, 7548, 104, 154 manual Removing the power supply assembly
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7539, 154, 7548, 104 specifications

Lenovo is known for its innovative technology and cutting-edge devices, and the model 104,7548,154,7539 is no exception. This device integrates a range of features designed to enhance user experience and productivity. One of the standout features is its powerful processing capability, leveraging advanced Intel or AMD processors that ensure seamless multitasking and performance during demanding applications.

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