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Chapter 4: Motherboard Connections
Clear CMOS
Clear CMOS (JBT1) is used to clear the saved system setup configuration stored in the
CMOS chip. To clear the contents of the CMOS using JBT1, short the two pads of JBT1 with
metallic conductor such as a flathead screwdriver. This will erase all user settings and revert
everything to their factory-set defaults.
Watch Dog Enable/Disable
Watch Dog (JWD1) is a system monitor that can reboot the system when a software application
hangs. Close pins 1-2 to reset the system if an application hangs. Close pins 2-3 to generate
a non-maskable interrupt signal for the application that hangs. Refer to the table below for
pin definitions.
Watch Dog Enable/Disable
Jumper Settings
Jumper Setting
Definition
Pins 1-2
Reset (Default)
Pins 2-3
NMI
Open
Disabled
Manufacturing Mode
Close pins 2-3 of JPME2 to bypass SPI flash security and force the system to operate in
Manufacturing Mode, allowing you to flash the system firmware from a host server for system
setting modifications. Refer to the table below for jumper settings.
Manufacture Mode
Jumpers Settings
Jumper Setting
Definition
Pins 1-2
Enabled (Default)
Pins 2-3
Manufacturing Mode
External Speaker / Buzzer
Close pins 3-4 of JD1 with a cap to use the onboard buzzer. If you wish to use an external
speaker, close pins 1-4 with a cable. Refer to the table below for pin definitions.
External Speaker / Buzzer
Pin Definitions
Jumper Setting
Definition
Pins 1-4
External Speaker
Pins 3-4
Buzzer (Default)