Mainboard Jumpers - MSI MS-9A19 User Manual

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COM Port Power Jumper: JCOMP1
These jumpers specify the operation voltage of the onboard serial ports.
1
3
JCOMP1
Clear CMOS Jumper: JBAT1
There is a CMOS RAM onboard that has a power supply from an external
battery to keep the data of system configuration. With the CMOS RAM, the
system can automatically boot OS every time it is turned on. If you want to
clear the system configuration, set the jumper to clear data.
1
JBAT1
Important
You can clear CMOS by shorting 2-3 pin while the system is off. Then return
to 1-2 pin position. Avoid clearing the CMOS while the system is on; it will
damage the mainboard.
2
1
2
4
4 3
VCC5
1
Keep Data
2
1 2 1
1
4 4
3 3 3
+12V
VCC5
1
Clear Data
MS-9A19
2
4
+12V
2-13