Lenovo 10AX, Maintenance Manual, Page: 79 / 260

• Self-service CRUs: These CRUs unplug or are secured by no more than two screws. Examples of
these types of CRUs include the keyboard, the mouse, any USB device, and the power cord. Other
self-service CRUs depending on product design might include memory modules, adapter cards, hard
disk drives, and optical drives.
• Optional-service CRUs: These CRUs are isolated parts within the computer and are concealed by an
access panel that is typically secured by more than two screws. Once the access panel is removed, the
specific CRU is visible.
Number FRU description
Self-service CRU Optional-service CRU
1
Power supply assembly No Yes
2
Heat sink and fan assembly No Yes
3
Microprocessor No Yes
4
Memory modules Yes No
5
Optical drive (available in some models) Yes No
6
Front Wi-Fi antenna (available in some models)
No Yes
7
Slim card reader (available in some models) No Yes
8
Front audio and USB assembly No Yes
9
Front bezel Yes No
10
Thermal sensor No Yes
11
Hard disk drive No Yes
12
System board No No
13
Battery Yes No
14
Wi-Fi card module (available in some models) No Yes
15
Wi-Fi adapter card (available in some models) No Yes
16
Rear Wi-Fi antenna (available in some models) Yes No
17
PCI Express card (available in some models)
Yes No
18
Cover presence switch (intrusion switch)
(available in some models)
Yes No
19
Rear fan assembly No Yes
20
Keyboard Yes No
21
Mouse Yes No
Looking up FRU information
For detailed FRU information, such as the FRU part numbers and supported computer models, go to:
http:/www.lenovo.com/serviceparts-lookup
Locating parts on the system board
Note: Your computer comes with one of the following system boards.
Chapter 8
.
Locations
73