Lenovo 10BN, Руководство по техническому обслуживанию аппаратной части, Страница: 82 / 204

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 fan duct No Yes
3
Heat sink and fan assembly No Yes
4
Optical drive Yes No
5
Power switch unit No No
6
Front audio and USB assembly
No Yes
7
Front bezel Yes No
8
Front fan assembly No Yes
9
Internal speaker Yes Yes
10
Front WiFi antenna No Yes
11
Cover presence switch (intrusion switch)
Yes No
12
Battery Yes No
13
Hard disk drive Yes No
14
Memory modules Yes No
15
WiFi card module No Yes
16
WiFi adapter card No Yes
17
Rear WiFi antenna No No
18
Peripheral Component Interconnect (PCI) card Yes No
19
System board No No
20
Microprocessor No Yes
21
Keyboard Yes No
22
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
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ThinkCentre M78 Hardware Maintenance Manual