Asus P4S133 User Manual page 47

11. Audio Input Line In Header (5 pin ALIN1)
This connector suports audio input on left and right stereo audio
channels. NOTE: The motherboard ships with Jumper caps over pins
1-2 and 4-5. Remove them only when making audio input
connections.
P4S133
®
P4S133 LINE_IN Connector
12. Chassis Open Alarm Lead (4-1 pin CHASSIS1)
This lead is intended for a chassis that supports intrusion detection.
The lead requires an external detection mechanism such as a chassis
intrusion monitor/sensor or microswitch. When any chassis component
is removed, the sensor is triggered and a high-level signal is sent to
this lead to record a chassis intrusion event. The event is then be
processed by software such as LDCM. When not using the chassis
intrusion lead, place a jumper cap over the pins to close the circuit.
Removing the jumper cap prevents the system from booting up.
P4S133
®
P4S133 Chassis Alarm Lead
ASUS P4S133 motherboard user guide
ALIN1
1
CHASSIS1
35