Clear Cmos (J1); System Temperature Thermal Sensor (J2) - Aaeon PCM-6890 User Manual

Clear CMOS (J1)

You can use J1 to clear the CMOS data if necessary. To reset the
CMOS data, set J1 to 2-3 closed for just a few seconds, and then
move the jumper back to 1-2 closed.
Clear CMOS (J1)
J1
*default
System
(J2)
This jumper is reserved to connect a system temperature thermal
sensor in order to detect the system temperature.
18 PCM-6890 User Manual
Protect*
1
2
3
temperature
Clear CMOS
thermal
1
2
3
sensor