Chapter 2: Installation
2-15
HDD LED
The HDD LED connection is located
on pins 13 and 14 of U66. Attach
the hard drive LED cable here to
display disk activity (for any hard
drives on the system, including
SCSI, Serial ATA and IDE). See
the table on the right for pin defini-
tions.
HDD LED Pin
Definitions
(U66)
Pin
Number
13
14
Definition
Vcc
HD Active
NIC1 LED
The NIC (Network Interface Con-
troller) LED connection for the
GLAN port is located on pins 11
and 12 of U66. Attach the NIC LED
cable to display network activity.
Refer to the table on the right for
pin definitions.
NIC LED Pin
Definitions
(U66)
Pin
Number
11
12
Definition
Vcc
GND
NIC2 LED
The NIC (Network Interface Con-
troller) LED connection for the
GLAN port is located on pins 9 and
10 of U66. Attach the NIC LED
cable to display network activity.
Refer to the table on the right for
pin definitions.
NIC 2 LED Pin
Definitions
(U66)
Pin
Number
9
10
Definition
Vcc
GND
Power Button
Overheat LED
1
NIC1 LED
Reset Button
2
Power Fail LED
HDD LED
Power LED
Reset
Pwr
Vcc
Vcc
Vcc
Vcc
Ground
Ground
19
20
Vcc
X
Ground
NMI
X
X
NIC2 LED
24Pin PW1
1
5
2
6
CO
M
1
3
3
7
7
4
4
8
8
LAN1
LAN
2
VGA
S C S I B
U S B 2 / 3
C H
IPMI
S M B
C P U 1
CPU2
F
a
n
2
2
4
-P
in
P
W
2
2
4
P
in
P
W
2
ID
E
1
ID
E
2
Fan6
Fan5
5
Fan6
Fan1
S M B
P W
A l a r m
R e s e t
DIMM1
DIMM2
DIMM5
DIMM6
DIMM3
DIMM7
DIMM4
DIMM8
MRH-D
MRH-D
MRH-D
MRH-D
PCI-X
SCSI A
L S I
S C S I
Controller
P 6 4 H
ICH4
SIOH
S N C
VRM-top
VRM-top
FP C T L R
R
US
B
0/1
Fan7
GLAN
C T L R
Fan8
S I/O
S
Fa
n
4
Fan4
Fan3
3
3
P W R
Fault
COM2
6
2
5
DIMM5
1
HDD LED
NIC1 LED
NIC2 LED
