Chapter 2: Installation
2-11
CD Header (P4SGA/SGL)
There are two 4-pin CD headers
of different sizes on the
motherboard. These allow you to
use the onboard sound for audio
CD playback. Connect the audio
cable from your CD drive to the
header that fits your cable's con-
nector. Only one CD header can
be use at any one time. See the
tables on the right for pin defini-
tions.
Overheat LED (JOH1)
Connect an LED to the JOH1
header to provide warning of
chassis overheating. See the
table on the right for pin defini-
tions.
Pin
Number
1
2
Definition
+5V
OH Active
Overheat LED
Pin Definitions (JOH1)
Chassis Intrusion
The Chassis Intrusion header is
designated JL1. See the board
layout in Chapter 1 for the location
of JL1 and the table on the right
for pin definitions.
Pin
Number
1
2
Definition
Intrusion Input
Ground
Chassis Intrusion
Pin Definitions (JL1)
Fan Headers
There are three fan headers on
the P4SGA/P4SGL, which are
designated CPU Fan, Chassis Fan
1 and Chassis Fan 2. The P4SGR/
P4SGE also has an Overheat Fan.
Connect the fan on your CPU
heatsink to the CPU Fan header.
See the table on the right for pin
definitions.
Fan Header Pin Definitions
(CPU, Chassis and Overheat)
Pin
Number
1
2
3
Definition
Ground (black)
+12V (red)
Tachometer
Caution: These fan headers are DC power.
Audio CD Header Pin Definitions
(CD2)
Pin
Number
1
2
3
4
Definition
Right Stereo Signal
Ground
Ground
Left Stereo Signal
Audio CD Header Pin Definitions
(CD1)
Pin
Number
1
2
3
4
Definition
Left Stereo Signal
Ground
Ground
Right Stereo Signal
