2
Hardware Installation
15
2.1 System Board Layout
Chapter 2 - Hardware Installation
NB73-EA
(Supports onboard LAN)
KB
Mouse
J2
J5
COM 1
(CN1)
Parallel (CN2)
COM 2 (CN3)
Wake-On-
KB/Mouse (JP1)
Socket 478
CPU fan
(J1)
AT
X
M
ain
Powe
r
System fan
(J4)
J9
J14
J8
FDD
Secondar
y
IDE
Pr
imar
y
IDE
Battery
15
11
5
1
Clear CMOS
(JP3)
Firmware
Hub
Winbond W83637
PCI Standby Power LED
AC’97
2
1
9
10
Front audio (J13)
CPU FSB
select (JP2)
+12V power
(ATXP2)
4
3
2
1
Intel
845E
Intel
ICH4
CD-in (J7)
DIMM Standby
Power LED
AGP Slot
PCI 1 Slot
PCI 2 Slot
PCI 3 Slot
PCI 4 Slot
PCI 5 Slot
CNR Slot
Wake-On-Ring (J12)
DDR SDRAM
DIMM 1
ATXP1
DDR SDRAM
DIMM 2
J20
Factory use
only (J3)
CN4
LAN
Line- out Line- in Mic- in
J6
Realtek
RTL8100
16
15
2
1
S/PDIF-in (J27)
S/PDIF-out (J26)
IrDA
(J16)
Chassis
open (J19)
Wake-On-
LAN (J17)
Square denotes pin 1
USB
1
Auxiliary power
(ATXP3)
Wake-On-USB KB for
USB 1/2/3/4 (JP8)
AGP Warning LED
2
1
7
J27
J26
J25
J15
J21
Wake-On-USB KB
for USB 5/6 (JP9)
LED 3
LED 4
LED 5
LED 6
Second
fan (J23)
PWR-LED
ATX-SW
G-LED
G-SW
HD-LED
2 1
2019
6
1
10
5
SC (JP6)
RESET
SPEAKER
USB
3
USB
2
USB
4
JP8
TAD (J11)
USB 6 select
(J20 & J21)
4CH audio (J25)
Game/MIDI (J15)
J24
USB 5 & 6
(J18/J22)
MS/SD
(JP4)