Lenovo H520g Lenovo H520g Hardware Maintenance Manual - Page 71

disk drives, and optical drives.

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Figure 3. Component locations The following table lists the major FRUs shown in Figure 3 "Component locations" on page 67 and identifies which FRUs also are 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 FRU description Heat sink and fan assembly Memory modules Front bezel Hard disk drive PCI card (installed in some models) PCI Express x16 graphics card slot System board Power supply assembly Self-service CRU No Yes Yes No Yes Yes No No Optional-service CRU Yes No No Yes No NO No Yes Chapter 8. Locations 67

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Figure 3. Component locations
The following table lists the major FRUs shown in Figure 3 “Component locations” on page 67 and identifies
which FRUs also are 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
FRU description
Self-service CRU
Optional-service CRU
1
Heat sink and fan assembly
No
Yes
2
Memory modules
Yes
No
3
Front bezel
Yes
No
4
Hard disk drive
No
Yes
5
PCI card (installed in some models)
Yes
No
6
PCI Express x16 graphics card slot
Yes
NO
7
System board
No
No
8
Power supply assembly
No
Yes
Chapter 8
.
Locations
67