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20
Chapter 2
Board Installation
to the boards functionalitiy may be increased. This header should be left
untouched.
1-L Hardware Reset Switch Connector Installation
The Reset switch on your cases display panel provides you with the Hard-
ware Reset function, which is the same as power on/off. The system will do a
cold start after the Reset button is pushed. (J16 pin 7 & 8)
1-M Creative Labs Audio Connectors
There are four black 4-pin connectors onboard which are used for various
peripherals audio signals. The digital signal that comes in through these
connectors is directed through the Creative Labs ES1373 PCI sound chip, and
the digital signal is turned into an audio signal which goes out through the
speaker. The TDA connector (J21) is for modem audio; the MPEG connector
(J20) is for DVD and TV cards; the VIDEO connector is (J22); the CD connector
(J23) is for CD-ROMs.
1-N External SMI
The EXTSMI (External System Management Interface) connector, jumper JP16,
is used by some plug-in cards. Certain applications associated with these plug-
in cards use the interface for hardware control and queries.
1-O Intrusion Alarm Connector
The J7 connector is an intrusion alarm, that can be connected to the system
chassis. When active (J7 is connected to the chassis), this alarm will alert the
system administrator anytime someone opens the systems case.
1-P Power LED Connector
Jumper D31 is a three pin power LED header that can be used if you have a 3
pin Power LED. Otherwise refer to panel connector J16 for 2 pin LEDs. 3 pin
LEDs can still be used on J16 where pin 13 would be for the Ground pin.
CMOS RTC
The Real Time Clock (RTC) circuit, which provides the date and time for the
system is integrated into the 440BX or Via Apollo Pro Plus AGPset. If the
external battery for the RTC is low, it will prevent your system from POSTing,
and you will not get a display. Normally the life span of an external battery is 2
years. If yours is running low, you will need to replace it with a new 3V lithium
battery (Sony CR2032).