User`s manual

PCA-6005-B User’s Manual 24
2.11.1 Keyboard lock and power LED (CN16)
CN16 is a 5-pin connector for the power on LED. Refer to Appendix B
for detailed information on the pin assignments. If a PS/2 or ATX power
supply is used, the system's power LED status will be as indicated below:
2.11.2 External speaker (CN17)
CN17 is a 4-pin connector for an extenal speaker. If there is no external
speaker, the PCA-6005-B provides an onboard buzzer as an alternative.
To enable the buzzer, set pins 3-4 as closed.
2.11.3 Reset (CN18)
Many computer cases offer the convenience of a reset button. Connect the
wire from the reset button.
2.11.4 HDD LED (CN19)
You can connect an LED to connector CN19 to indicate when the HDD is
active.
2.11.5 External SM bus connector (CN29)
Table 2.2: PS/2 or ATX power supply LED status
Power mode LED (PS/2 power) LED (ATX power)
System On On On
System Suspend Fast flashes Fast flashes
System Off Off Slow flashes
1
1