Lenovo ThinkCentre M92z Hardware Maintenance Manual - ThinkCentre M92z (type 3 - Page 79

The following table lists the major FRUs shown in Figure 5 "Locating major FRUs and CRUs for models with the 20-inch display" on page 74 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 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 FRU description Frame stand (available on some models) Thermal sensor Heat sink Battery Microprocessor Memory modules Heat sink and fan assembly for graphics processing unit (GPU) (available in some models) Card reader (available in some models) ExpressCard (available in some models) WiFi card (available in some models) Rear I/O assembly System board Power supply assembly Rear PS/2 connectors and serial port assembly WiFi antennas Front bezel Internal speaker Frame foot (available on some models) Bluetooth module (available in some models) Internal speaker Power switch and control button board Volume control module LCD panel Hard disk drive Optical drive (available in some models) Converter board Microprocessor fan VESA (Video Electronics Standards Association) mount bracket Self-service CRU Yes No Yes No No Yes No Yes No Yes No No No No No No Yes No Yes Yes No No No Yes Yes No No No Optional-service CRU No Yes No No Yes No Yes No Yes No Yes No No Yes No No No Yes No No No No No No No Yes No No Chapter 8. Locations 75