Lenovo 70AL Maintenance Manual page 51

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Figure 25. System board components
1
4-pin power connector
2
System board battery
3
Microprocessor socket
4
Microprocessor fan connector
5
Memory slot 1 (DIMM1)
6
Memory slot 2 (DIMM2)
7
Memory slot 3 (DIMM3)
8
Memory slot 4 (DIMM4)
9
Thermal sensor connector
10
System fan 2 connector
11
4-pin power connector
12
4-pin power connector
13
Main power connector
14
SATA connector 3
15
SATA connector 0
16
SATA connector 4
17
SATA connector 1
18
SATA connector 2
19
System fan 1 connector
20
Front panel connector
21
Front USB 3.0 connector
22
Platform Controller Hub (PCH)
23
SATA SGPIO connector
24
USB 2.0 connector
25
Clear CMOS (Complementary Metal Oxide Semiconductor)
jumper
26
Management Engine (ME) disable jumper
27
Serial connector
28
PCI card slot (PCI slot 4)
29
PCI Express x4 card slot (PCI-E slot 3)
30
PCI Express x1 card slot (PCI-E slot 2)
31
PCI Express x16 card slot (PCI-E slot 1)
32
Rear system fan connector
33
Cover presence switch connector (intrusion switch connector)
.
Chapter 3 Product overview
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