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The following table lists the major FRUs shown in Figure 3 “Locating major FRUs and CRUs” on page 67 and
identies which FRUs are also self-service CRUs or optional-service CRUs.
Notes:
• 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
specic CRU is visible.
Number FRU description
Self-service CRU Optional-service CRU
1
Frame stand No Yes
2
Computer cover
No Yes
3
System board shield
No No
4
Microprocessor fan
No No
5
Handle bar No No
6
Heat sink assembly (with Microprocessor
underneath)
No No
7
Memory module No No
8
Battery No No
9
System board
No No
10
LCD bracket
No No
11
LCD panel
No No
12
Card reader
No No
13
Wi-Fi No No
14
Foot stand No Yes
15
Rear I/O assembly
No No
16
Internal speaker No No
17
Power supply No No
18
Internal speaker No No
19
Foot stand No No
20
Control button board
No No
21
Hard disk drive No Yes
22
Hard-disk-drive EMI shield No No
23
LCD converter board
No No
24
Optical drive
No No
25
VESA mount bracket
No No
26
Integrated camera No No
27
Keyboard Yes No
28
Mouse Yes No
68 ThinkCentre E73z Hardware Maintenance Manual