29 Chapter 1 Product InformationThis jumper allows you to clear the Real Time Clock (RTC) RAM inCMOS. You can clear the CMOS memory of date, time, and system setupparameters by erasing the CMOS RTC RAM data. The onboard buttoncell battery powers the RAM data in CMOS, which include system setupinformation such as system passwords.To erase the RTC RAM:1. Turn OFF the computer and unplug the power cord.2. Remove the onboard battery.3. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep thecap on pins 2-3 for about 5~10 seconds, then move the cap back topins 1-2.4. Reinstall the battery.5. Plug the power cord and turn ON the computer.6. Hold down the key during the boot process and enter BIOSsetup to re-enter data.Figure 1.7: Clear RTC RAMCaution! Except when clearing the RTC RAM, never removethe cap on CLRTC jumper default position. Removingthe cap will cause system boot failure!RP5B-VM DOCLRTCNormal Clear CMOS(Default)1 2 2 3P5B-VM DO Clear RTC RAM
