Lenovo ThinkCentre M93z Hardware Maintenance Manual page 77

The following table lists the major FRUs shown in Figure 3 "Locating major FRUs and CRUs for models with
the 23-inch display" on page 72 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
Frame stand or monitor stand (optional)
2
Thermal sensor
3
Heat sink
4
Battery
5
Wi-Fi card module (optional)
6
Microprocessor
7
Memory modules
8
Heat sink and fan assembly for graphics
processing unit (GPU) (optional)
9
Card reader (optional)
10
ExpressCard (optional)
11
mSATA solid-state drive (also can support mini
PCI Express x1 card function with limitation)
12
System board
13
Rear I/O assembly
14
Power supply assembly
15
Rear PS/2 connectors and serial port assembly
(optional)
16
WiFi antennas
17
Front bezel
18
Touch panel control board (optional)
19
Internal speaker
20
Frame foot (optional)
21
Touch panel control board (optional)
22
Internal speaker
23
Power switch and control button board
24
LCD panel
25
Hard disk drive
26
Optical drive (optional)
27
Converter board
FRU description Self-service CRU Optional-service CRU
Yes
No
Yes
No
No
No
Yes
No
Yes
No
Yes
No
No
No
No
No
No
Yes
No
Yes
Yes
No
No
Yes
Yes
No
Chapter 8
No
Yes
No
No
No
Yes
No
Yes
No
Yes
No
No
Yes
No
Yes
No
No
No
Yes
No
No
No
No
No
No
Yes
73
.
Locations