Chapter3 Installation / 23
e.
Speaker Connector (SPEAKER)
This 4-pin connector connects to the case-mounted speaker.
f.
ATX Power Switch (PW_BN)
The system power is controlled by a momentary switch con-
nected to this lead. Pushing the button once will switch the sys-
tem ON. The system power LED lights when the system's power
is on
11.
ATX Power Supply Connector (20-pin block) - PW1
This connector connects to a ATX power supply. The plug from
the power supply will only insert in one orientation because of
the different hole sizes. Find the proper orientation and push
down firmly making sure that the pins are aligned.
IMPORTANT:
Make sure that the ATX power supply can take at least
10mAmp load on the 5Volt standby lead (5VSB). You may
experience difficulty in powering on your system with-
out this.
Pin
Description
Pin
Description
1
3.3V
2
3.3V
3
GND
4
5V
5
GND
6
5V
7
GND
8
PW-OK
9
5VSB
10
12V
11
3.3V
12
-12V
13
GND
14
PS-ON
15
GND
16
GND
17
GND
18
-5V
19
5V
20
5V
