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PCA-6275 User's Manual
2.8 Front Panel Connectors
(CN10, CN11, CN12, CN13 and J3)
There are several external switches to monitor and control the
PCA-6275.
2.8.1 External speaker (CN10)
CN10 is a 4-pin connector for an extenal speaker connection. If there
is no external speaker, the PCA-6275 provides an on-board buzzer as
an alternative. To enable the buzzer, set pins 3-4 as closed.
2.8.2 Keyboard lock and power on LED (CN11)
CN11 is a 5-pin connector for the "keyboard lock" and "power on"
LED connection. Refer to Appendix B.12 for detailed information on
the pin assignments. The system's power LED status is indicated
below, according to the power supply used:
Power Mode LED (PS/2 Power) LED (ATX Power)
System On On On
System Suspend Flashes fast Flashes fast
System Off Off Flashes slowly
If an ATX power supply is used, refer to Section 2.5.1.
2.8.3 IDE LED (CN12)
You can connect an LED to connector CN12 to indicate when the
HDD is active.
2.8.4 Reset (CN13)
Many computer cases offer the convenience of a reset button. Connect
the wire from the reset button to CN13.
2.8.5 ATX soft power switch (J3)
If your computer case is equipped with an ATX power supply, you
should connect the power on/off button on your computer case to J3.
This connection enables you to turn your computer on and off.