30
P4B266-LA Quick Start Manual
Connectors
3. H/W SETUP
3. HARDWARE SETUP
The following is for items 14–32
14) ATX Power Switch Lead (2-pin PWR)
The system power is controlled by a momentary switch connected to this lead.
Pressing the button once will switch the system between ON and SOFT OFF.
Pushing the switch while in the ON mode for more than 4 seconds will turn the
system off. The system power LED shows the status of the system’s power.
15) IDE Activity LED Lead (2 pin IDELED)
This connector supplies power to the cabinet’s IDE activity LED. REad and
write activity by devices connected to the Primary/Secondary IDE and Primary/
Secondary ATA100 connectors will cause teh LED to light up.
16) System Power LED Lead (3-1 pin PLED)
This 3-1 pin connector supports the system power LED, which lights when the
system is powered on and blinks when it is in sleep mode.
17) Reset Switch Lead (2-pin RESET)
This 2-pin connector supports the case-mounted reset switch for rebooting your
computer without having to turn off your power switch. This is a preferred method
of rebooting to prolong the life of the system’s power supply.
18) System Message LED Lead (2-pin MLED)
This lead signals whether a message has been received from a fax/modem. The
LED will remain lit when there is no signal and blink when there is data re-
ceived. This function requires an ACPI OS and driver support.
19) Keyboard Lock Switch Lead (2-pin KLCK)
This 2-pin connector supports to the case-mounted key switch to allow key-
board locking.
20) System Management Interrupt Lead (2-pin SMI)
This lead allows the user to manually place the system into a suspend mode or
“Green” mode, where system activity is decreased to save electricity and ex-
pand the life of certain components when the system is not in use. This 2-pin
connector connects to the case-mounted suspend switch.
21) System Warning Speaker Lead (4-pin SPEAKER)
This 4-pin connector supports to the case-mounted speaker. Two sources
(LINE_OUT and SPEAKER) will allow you to hear system beeps and warn-
ings. Only SPEAKER will allow you to hear system beeps before the integrated
audio has been properly initialized.
PLED
Ground
MLED
PWR
+5 V
+5V
Speaker
Speaker
Connector
Power LED
Ground
+5 V
Reset SW
SMI Lead
Message LED
ExtSMI#
Ground
Reset
Ground
Ground
IDELED-
IDELED
ATX Power
Switch*
P4B266-LA
P4B266-LA System Panel Connectors
*
Requires an ATX power supply.
