VB7009 User Manual
33
3.1.
Clear CMOS Jumper
The onboard CMOS RAM stores system configuration data and has an onboard battery power supply. To
reset the CMOS settings, set the jumper on pins 2 and 3 while the system is off. Return the jumper to pins
1 and 2 afterwards. Setting the jumper while the system is on will damage the mainboard. The default
setting is on pins 1 and 2.
1
Figure 31: Clear CMOS jumper diagram
Setting
Pin 1
Pin 2
Pin 3
Regular (default)
Short Short Open
Clear CMOS
Open Short Short
Table 27: Clear CMOS jumper settings
Note:
Except when clearing the RTC RAM, never remove the cap from the CLEAR_CMOS jumper default position.
Removing the cap will cause system boot failure. Avoid clearing the CMOS while the system is on; it will
damage the mainboard.
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