Pin 1
10. Support Six USB 2.0 Connectors
9. Front Audio Connector
If the housing has been designed with an audio port on the front panel, you’ll be able to
connect onboard audio to front panel through this connector. By the way, please remove
5-6 and 9-10 jumper caps from the Front Audio Connector before connecting the cable.
Please do not remove these 5-6 and 9-10 yellow jumper caps if there’s no audio port on
the front panel.
This motherboard provides six USB connectors to connect USB devices, such as mouse,
keyboard, modem, printer, etc. There are four connectors on the PC99 back panel. You
can use proper cables to connect the onboard USB connector to the USB modules or front
panel of chassis. Compared to traditional USB 1.0/1.1 with the speed of 12Mbps, USB 2.0
has a fancy speed up to 480Mbps, which is 40 times faster than the traditional one.
Pin 1
12. Super 5.1 Channel Audio Effect
This motherboard comes with an ALC655 CODEC, which supports high quality of 5.1
Channel audio effects, bringing you a brand new audio experience. On the strength of the
innovative design of ALC655, you're able to use standard line-jacks for surround audio
output without connecting any external module. To apply this function, you have to install
the audio driver in the Bonus Pack CD as well as an audio application supporting 5.1
Channel. Picture bellow represents the standard location of all speakers in 5.1 Channels
sound track. Please connect the plug of your front speakers to the green “Speaker out”
port, rear speakers’ plug to the blue “Line in” port and both of the center and subwoofer
speakers to the red “MIC in” port.
11. S/PDIF Connector
S/PDIF (Sony/Philips Digital Interface) is a newest audio transfer file format, which provides
impressive audio quality through optical fiber and allows you to enjoy digital audio instead of
analog audio. Through a specific audio cable, you can connect the S/PDIF connector to other
end of the S/PDIF audio module, which bears S/PDIF digital output. Normally there are two
S/PDIF outputs as shown, one for RCA connector, the most common one used for consumer
audio products, and the other for optical connector with better audio quality. Same as outputs,
you can also connect RCA or optical audio products to input connectors on the module and
have the voice or music come out from your computer. However, you must have a S/PDIF
supported speaker/amplifier/decoder with S/PDIF digital input/output to connect to the S/PDIF
digital input/output to make the most out of this function.
S/PDIF
Connector
+5V
NC
S/PDIFOUT
GND
S/PDIFIN
1
S/PDIF Module
(User Upgrade Optional for
AK89-L and AK89-N)
S/PDIF
Cable
S/PDIF OUT
S/PDIF IN
(RCA)
S/PDIF IN
(Optical)
S/PDIF OUT
Pin 1
Onboard USB2 Connector
+5V
SBD3-
SBD3+
GND
NC
+5V
SBD2-
SBD2+
GND
KEY
1
1
AUD_GND
AUD_VCC
AUD_RET_R
KEY
AUD_RET_L
AUD_MIC
AUD_MIC_BIAS
AUD_FPOUT_R
NC
AUD_FPOUT_L
Front Audio Connector
