3-5
NANO-002
NI
TX-S
K
L1
NITX-SKL1 Clear RTC RAM
1 2
2 3
Normal
(Default)
Clear RTC
CLRTC1
3.4 Jumpers
1. Clear RTC RAM (3-pin CLRTC)
This jumper allows you to clear the Real Time Clock (RTC) RAM in
CMOS. You can clear the CMOS memory of date, time, and system setup
parameters by erasing the CMOS RTC RAM data. The button cell battery
powers the RAM data in CMOS, which include system setup information such
as system passwords.
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper
default position. Removing the cap will cause system boot failure!
• If the steps above do not help, remove the onboard battery and move
the jumper again to clear the CMOS RTC RAM data. After the CMOS
clearance, reinstall the battery.
• You do not need to clear the RTC when the system hangs due to
overclocking. For system failure due to overclocking, use the CPU
Parameter Recall (C.P.R.) feature. Shut down and reboot the system, then
the BIOS automatically resets parameter settings to default values.
• Due to the chipset limitation, AC power off is required before you use the
C.P.R. function. You must turn off and on the power supply or unplug and
plug the power cord before rebooting the system.
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins
2-3 for about 5-10 seconds, then move the cap back to pins 1-2.
3. Plug the power cord and turn ON the computer.
4. Hold down the <Del> key during the boot process and enter BIOS setup to
re-enter data.
