Dell Vostro 420 Service Manual page 43

1 power connector
(PWR2)
4 main power connector
(PWR1)
7 serial ATA drive
connector (SATA3)
10 front I/O panel
connector
13 CMOS jumper (CLEAR
CMOS)
16 PCI connector (PCI1)
19 PCI Express x1
connector (PCIE_X1)
22 chassis fan power
25 PS/2 mouse and
keyboard connectors
2 processor heat
sink/fan assembly
power
5 serial ATA drive
connector (SATA2)
8 serial ATA drive
connector (SATA0)
11 USB1 system board
connector (from front
I/O panel)
14 USB3 system board
connector
17 PCI connector (PCI2)
20 audio connectors
23 USB ports (2)
Working on Your Computer
3 memory module
connectors (2)
6 serial ATA drive
connector (SATA1)
9 battery socket
12 USB2 system board
connector (from front
I/O panel)
15 audio connector
(AUDIO1) (from front
I/O panel)
18 PCI Express x16
connector (PCIE_x16)
21 one LAN and two USB
ports
24 video connector (VGA)
43