Lenovo ThinkCentre 3512 Manual page 76

The following table lists the major FRUs shown in Figure 3 "Locating major FRUs and CRUs" on page 69 and
identifies 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
specific CRU is visible.
Number
1
System stand hinge cover
2
System stand
3
Computer cover
4
System board shield window
5
System board shield
6
Handle bar
7
Heat sink assembly
8
Microprocessor
9
Memory module
10
Battery
11
Microprocessor fan
12
System board
13
Card reader
14
Internal speaker
15
WI-FI connector
16
Power supply
17
Rear I/O connector
18
Frame stand
19
Internal speaker
20
Control button board
21
Hard disk drive
22
LCD bracket
23
LCD panel
24
Converter board
25
Optical drive
26
VESA mount bracket
27
Integrated camera
28
Keyboard
29
Mouse
70
ThinkCentre Hardware Maintenance Manual
FRU description
Self-service CRU Optional-service CRU
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No