Jetway Computer NC9I - Manual (Page 22)

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(4) USB2 (4-pin): USB 2.0 Port Header
Pin 1
GND
+ DATA
VCC
-DATA
(5) PWR LED1(3-pin): PWR LED Header
The Power LED is light on while the system power is on. Connect the Power LED
from the system case to this pin header.
(6) SPEAK1 (4-pin): Speaker Header
This 4-pin header connects to the case-mounted speaker. See the figure below.
SPEAK1
SPE
A
K
NC NC VC
C
Pin 1
PWRLED1 Pin 1
VC
C
GN
D
GN
D