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2.3.13.4 Power LED and KEYLOCK header (KEYLOCK)
The power LED and keylock header is located on pins 11--15 (marked as KEYLOCK) of
the front panel. It contains two functions: the power on LED header and the keylock header.
The power on LED can be connected to a LED. When the computer is powered on, the
LED will be lighted up. The keylock header can be connected to a switch on the chassis.
When the switch is close, keyboard function will be disabled temporarily until the switch is
open.
Signal of KEYLOCK header
Pin 11
Anode (+)
Pin 12
NC
Pin 13
Cathode (-)
Pin 14
KEYLOCK
Pin 15
Ground
2.3.13.5 SPEAKER header (SPEAKER)
The 4-pin speaker header is located on pins 17--20 (marked as SPEAKER) of the front
panel connector. The speaker provides error beep code information during the POST in the
event that the computer can not use the video interface.
Signal of SPEAKER header
Pin 17
VCC
Pin 18
Ground
Pin 19
NC
Pin 20
BUZZ
2.3.14 Infrared connector (JP1)
Serial Port 2 can be configured to support an IrDA module connected to this connector. After the
IrDA interface is configured, data can be transferred between devices by using application
software.
Signal of JP1 connector
Pin 1
VCC
Pin 5
IRTX
Pin 2
FIRRX
Pin 6
NC
Pin 3
IRRX
Pin 7
CIRRX
Pin 4
Ground
2.3.15 Clear CMOS jumper block (JP3)
To reset the RTC (Real Time Clock) CMOS data, you need to change the jumper cap of JP3 from
1-2 close to 2-3 close, then set to 1-2 close again. After that, you should get into BIOS setup
program and choose LOAD SETUP DEFAULTS, then you will now get original manufacturer
default setting in your CMOS.
