Speaker (Speaker Connector) - Albatron KM266 Series Manual

HD LED (Hard Drive LED Connector)
This connector can be attached to an LED on the front panel of
a computer case. The LED will flicker during disk activity. This
disk activity only applies to those IDE drives directly attached to
the system board.
RST (Reset Button)
This connector can be attached to a momentary SPST switch.
This switch is usually open and when closed will cause the
motherboard to reset and run the POST (Power On Self Test).
ACPI PWR-LED (ACPI Power LED Connector)
This connector can be attached to an LED on the front panel of
a computer case. The LED will illuminate while the computer is
powered on and it will flashing during power saving mode。
PWR ON (Power Button)
This connector can be attached to a front panel power switch.
The switch must pull the Power Button pin to ground for at least
50 ms to signal the power supply to switch on or off. (The time
required is due to internal debounce circuitry on the system
board). At least two seconds must pass before the power supply
will recognize another on/off signal.

4.2 SPEAKER (Speaker Connector)

PIN
1
2
An offboard speaker can be installed on the motherboard as a
manufacturing option. An offboard speaker can be connected to
the motherboard at the front panel connector. The speaker
(onboard or offboard) provides error beep code information
during the Power On Self-Test when the computer cannot use
the video interface. The speaker is not connected to the audio
subsystem and does not receive output from the audio
subsystem.
Assignment PIN
+5V
GND
12
Assignment
3 NC
PC_BEEP
4