Front Audio Connector; Irda Connector - AOpen MX34-U Easy Installation Manual

10. Support 2nd USB Port
This motherboard provides 4 USB connectors to connect USB devices, such as mouse,
keyboard, modem, printer, etc. There are two connectors on the PC99 back panel. You can
use proper cable to connect other USB connectors to the back panel or front panel of
chassis.
Pin 1
1
+5V +5V
SBD2- SBD3-
SBD2+ SBD3+
GND GND
KEY NC
USB2 Connector

11. 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.
Pin 1
1 2
FP_MIC GND
+5V
MICVREF
NC
PHONE_R
NC KEY
NC
PHONE_L
9 10
12. Connecting CD / MODEM / AUX
CD-IN
AUX-IN
MODEM-CN

13. IrDA Connector

The IrDA connector can be configured to support wireless infrared module, with this module and
application software such as Laplink or Windows 95 Direct Cable Connection, the user can
transfer files to or from laptops, notebooks, PDA devices and printers. This connector supports
HPSIR (115.2Kbps, 2 meters) and ASK-IR (56Kbps).
Install the infrared module onto the IrDA connector and enable the infrared function from BIOS
Setup, UART Mode, make sure to have the correct orientation when you plug in the IrDA
connector.
Pin 1
IrDA Connector
1
NC KEY
+5V GND
IR_TX IR_RX
IrDA Connector
The CD-IN connector is used to connect CD Audio
cable from CDROM or DVD drive to onboard sound.
The MODEM-CN connector is used to connect
Mono In/ Mic Out cable from internal modem card to
onboard sound circuit.
The AUX-IN connector is used to connect MPEG
Audio cable from MPEG card to onboard sound.
Connector Pin1 Pin2 Pin3
CD-IN
Left GND GND
MODEM-CN
Mono In GND GND Mic Out
AUX-IN Left GND GND
Pin4
Right
Right