User manual

VB8004
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VB8004 User Man
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User Manual
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ual
35
3.
3.3.
3. Jumpers and Switches
Jumpers and SwitchesJumpers and Switches
Jumpers and Switches
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.
Figu
FiguFigu
Figure
re re
re 32
3232
32: C
: C: C
: Clear
learlear
lear CMOS jumper
CMOS jumper CMOS jumper
CMOS jumper
Setting
SettingSetting
Setting Pin 1
Pin 1Pin 1
Pin 1 Pin 2
Pin 2Pin 2
Pin 2 Pin 3
Pin 3Pin 3
Pin 3
Regular (default) On On Off
Clear CMOS Off On On
Table
Table Table
Table 22
2222
22: C
: C: C
: Clear
lear lear
lear CMOS jumper settings
CMOS jumper settingsCMOS jumper settings
CMOS jumper settings
Note:
Note:Note:
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.