Chapter 5 Installation
AI5TT Pentium Baby AT Motherboard User
’
s Manual
27
5.12 J15: Front Bezel Connector
The front bezel of the case has a control panel which provides light
indication of the computer activities and switches to change the
computer
’
s status. J15 is a 20-pin header that provides interfaces for the
following functions.
Hard Disk Drive LED
Reset
Switch
Turbo LED Connector
Not Defined
Dual Function Power Button
Power LED and Keylock
Speaker
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
