Chapter 5 Installation
TI7NBA Socket 370 ATX Motherboard User’s Manual
25
5.15 J18: Front Bezel Connectors
The front bezel of the case has a control panel, which provides light
indication of the computer activities and switches to change the computer
status. J18 is a 20-pin header that provides interfaces for the following
functions.
Hard Disk Drive LED
Turbo LED Connector
SMI / Hardware Switch
Speaker
Reset Switch
ATX Power On Switch
Power LED and Keylock
Speaker: Pins 1 - 4
This connector provides an interface to a speaker for audio
tone generation. An 8-ohm speaker is recommended.
Pin #
Signal Name
1 Speaker
out
2 No
connect
3 Ground
4 +5V
Power LED and Keylock: Pins 11 - 15
The power LED indicates the status of the main power
switch. The keylock switch, when closed, will disable the
keyboard function.
Pin #
Signal Name
11 Power
LED
12 No
connect
13 Ground
14 Keylock
15 Ground
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