Lenovo THINKCENTRE 4485 - Manual (Page 127)

Locating parts on the system board
Figure 52 “System board parts locations” on page 119 shows the locations of the parts on the system board.
Figure 52. System board parts locations
1 4-pin power connector 15 eSATA connector
2 Microprocessor 16 Power fan connector
3 Microprocessor fan connector 17 Front panel connector (for connecting power switch and
LED indicators)
4 Memory slot 1 (DIMM1) 18 Front USB connector 1 (for connecting USB port 1and 2
on the front bezel)
5 Memory slot 2 (DIMM2) 19 Front USB connector 2 (for connecting additional USB
devices)
6 Memory slot 3 (DIMM3) 20 Serial (COM2) connector
7 Memory slot 4 (DIMM4) 21 Internal speaker connector
8 Thermal sensor connector 22 Front audio connector
9 24-pin power connector 23 PCI card slots (2)
10 Battery 24 PCI Express x1 card slot
11 Clear CMOS (Complementary Metal Oxide
Semiconductor) /Recovery jumper
25 PCI Express x16 graphics card slot
12 Parallel connector 26 System fan connector
13 SATA connectors 1 and 2 (SATA 3.0 connectors) 27 Cover presence switch connector (Intrusion switch
connector)
14 SATA connector 3 (SATA 2.0 connector) 28 PS/2 keyboard and mouse connector
Chapter 9 . Replacing FRUs (Machine Types: 4466, 4471, 4474, 4477, 4480, 4485, 4496, 4498, 4503, 4512, 4514,
4518, 4554, 7005, 7023, 7033, 7035, 7072, 7079, and 7177.) 119