Lenovo FM 300s Hardware Maintenance Manual page 39

• 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
1
Computer cover
2
Power supply assembly
3
Optical drive holder
4
Optical drive
5
Optical drive bezel
6
Storage drive bracket
7
Storage drive (a 2.5-inch or 3.5-inch storage drive)
8
Front audio and USB assembly
9
Card reader bracket
10
Card reader
11
Coin-cell battery
12
Front Wi-Fi antenna
13
Front fan
14
Thermal sensor
15
Memory modules
16
Microprocessor
17
M.2 Wi-Fi card
18
PCI Express card
19
Rear Wi-Fi antenna
20
System board
21
Heat sink and fan assembly
22
Front bezel
23
Power cord
For detailed FRU information, such as the FRU part numbers and supported computer models, go to:
http:/www.lenovo.com/serviceparts-lookup
FRU description Self-service CRU Optional-service CRU
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
Yes
No
No
No
Yes
Yes
.
Chapter 2
No
No
No
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
No
Yes
No
No
33
Product overview