Lenovo 70AL, Maintenance Manual, Page: 38 / 190

Components of server models with four 3.5-inch non-hot-swap hard disk drive bays
Figure 13. Components of server models with four 3.5-inch non-hot-swap hard disk drive bays
1
Cover presence switch
11
Front system fan 2
2
Power conversion board
12
System board
3
Front panel
13
System board battery
4
Optical drive bay 2 (with an optical drive installed
in some models)
14
Low-profile PCI card bracket
5
Optical drive bay 1 (with an optical drive installed)
15
Main PCI card bracket
6
Hard disk drive bay 3
16
Expansion card
7
Hard disk drive bay 2
17
Heat sink and fan assembly
8
Hard disk drive bay 1
18
Rear system fan
9
Hard disk drive bay 0
19
Power supply
10
Front system fan 1
20
Four memory slots (installed memory modules vary by
model)
Note: The power conversion board 2 , low-profile PCI card bracket 14 , and main PCI card bracket 15 are
available in server models that come with a RAID card.
CRUs are parts that can be upgraded or replaced by the customer. If a CRU is determined to be defective
during the warranty period, a replacement CRU will be provided to the customer. Customers are responsible
for installing the self-service CRUs for this product. Customers also can install optional-service CRUs, which
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ThinkServer TS440 Hardware Maintenance Manual