Advantech AIMB-740-6CB1, User Manual

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25 Chapter 2
2.12.1 Power LED and Keyboard Lock (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:
2.12.2 External speaker (CN17)
CN17 is a 4-pin connector for an external speaker. If there is no external
speaker, the AIMB-740-6CB1 provides an onboard buzzer as an alterna-
tive. To enable the buzzer, set pins 3-4 as closed
2.12.3 Reset (CN18)
Many computer cases offer the convenience of a reset button. Connect the
wire from the reset button
2.12.4 HDD LED (CN19)
You can connect an LED to connector CN19 to indicate when the HDD is
active.
Table 2.1: 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