User manual

29 Chapter 2
2.12.6 Power LED and keyboard lock connector (JFP3 /
PWR_LED&KEY LOCK)
(JFP3 / PWR_LED&KEY LOCK) is a 5-pin connector for the power on
LED and Key Lock function. Refer to Appendix B for detailed informa-
tion on the pin assignments. The Power LED cable should be connected
to pin 1-3. The key lock button cable should be connected to pin 4-5.
There are 3 modes for the power supply connection. The first is "ATX
power mode", system is on/off by a tentative power button. The second is
"AT Power Mode", system is on/off by the switch of the Power supply.
The third is another "AT Power Mode" which is using the front panel
power switch. The power LED status is indicated as following table:
Table 2.1: ATX power supply LED status (No support for AT power)
Power mode LED (ATX Power
mode) (On/off by
tentative button)
LED (AT Power
mode) (On/off by
switch of Power
supply)
LED (AT Power
mode) (On/off by
front panel Switch)
PSON1 (On Back-
plane Jumper setting)
2-3 pin closed 1-2 pin closed Connect 1-2 pin
cable with switch
System On On On On
System Suspend Fast flashes Fast flashes Fast flashes
System Off Slow flashes Off Off