Advantech PCA-6774 user manual Clear Cmos J1, Cmos clear J1

2.6 Clear CMOS (J1)

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 “3.0 V Battery On.”

This jumper is used to erase CMOS data and reset system BIOS informa- tion.

The procedure for clearing CMOS is:

1.Turn off the system.

2.Short pin 2 and pin 3.

3.Return jumper to pins 1 and 2.

4.Turn on the system. The BIOS is now reset to its default setting.

Table 2.3: CMOS clear (J1)

*3.0 V normal clear CMOS

* default setting

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