Antec NSK 4000 II User Manual

5

There is an Intel® standard 10-pin AC’97 connector and an Intel® 10-pin HDA (High Definition 

Audio) connector linked to the front panel of the case. 

Pin Assignment for Audio Ports (HDA and AC’97)

1

MIC2 L

1

MIC In 

2

AGND

2

GND

3

MIC2 R 

3

MIC Power 

4

AVCC

4

NC

5

FRO-R

5

Line Out (R) 

6

MIC2_JD

6

Line Out (R)

7

F_IO_SEN

7

NC

8

Key (no pin)

8

Key (no pin)

9

FRO-L

9

Line Out (L)

10

LINE2_JD

10

Line Out (L)

1

2

3

5

7

9

4

6

10

You can connect either the AC’97 or the HDA connector depending on the model of the 

motherboard. Locate the internal audio connectors from your motherboard or sound card and 

connect the corresponding audio cable. Consult your motherboard or sound card manual for 

the pin-out positions. Even if your system supports both audio standards, you may only use 

one connector.

Connected to your front panel are LED leads for power and hard disk activity and switch leads 

for power and reset. Attach these to the corresponding connectors on your motherboard. 

Consult your motherboard manual for specific pin header locations. Polarity (positive and 

negative) does not matter for switches. For LEDs, colored wires are positive ( + ). White or 

black wires are negative ( – ). If the LED does not light up when the system is powered on, 

try reversing the connection. For more information on connecting LEDs to your motherboard, 

see your motherboard manual.