At/Atx Power Choose Jumper(J3); Clear Cmos (J4) - Advantech PCA-6781 User Manual

2.5.4

AT/ATX Power choose jumper(J3)

Table 2.6: AT/ATX Power choose jumper
Pin
1-2
2-3 (default)
2.5.5

Clear CMOS (J4)

Warning! To avoid damaging the computer, always turn off the power supply
before setting "Clear CMOS". Before turning on the power supply, set
the jumper back to normal operation.
This jumper is used to erase CMOS data and reset system BIOS
information.
The procedure for clearing CMOS is:
1. Turn off the system.
2. Short pins 2 and 3 for a few seconds.
3. Return jumper to pins 1 and 2.
3. Turn on the system. The BIOS is now reset to its default setting.
Table 2.7: Clear CMOS
Pin
1-2 (default)
2-3
PCA-6781 User Manual
1 2 3
Function
ATX Power
AT Power
1 2 3
Function
Normal
Clear CMOS
1 2 3
1 2 3
12