Lenovo ThinkStation P520 Hardware Maintenance Manual page 187

Card reader
To remove or install a card reader in the flex module, do the following:
1. Prepare your computer. See "Preparing your computer and removing the computer cover" on page 103.
2. Record the cable connections and cable routing. Then, disconnect all cables connected to the flex
module from the system board. See "Parts on the system board" on page 42.
3. Remove the flex module from the front of the computer. See "Device in the flex bay" on page 106.
4. Lift the clip on the side of the flex module upward. Then, slide the flex module cover to the rear of the
flex module to remove the cover.
Figure 138. Removing the flex module cover
5. If you are removing a card reader, do the following:
a. Pull the clip as shown to remove the card reader with the card reader retaining bracket out of the flex
module.
Figure 139. Removing the card reader in the flex module
b. Flex the four clips on the sides of the card reader retaining bracket to remove the card reader from
the bracket.
.
Chapter 9 Hardware removal and installation
179