User Guide

Installing the Mainboard 2- 5
The “keylock switch” is used to lock the computer’s keyboard.
This disables the keyboard so that unauthorized persons cannot use it.
When this function is in use, you will need to use the unlock key to
activate the keyboard.
PN1 - Power ON/OFF switch
There is no specific orientation. Since most cases do not support this feature, most
of you should ignore this instruction.
Pin number Name or significance of the signal
8 Ground
9 Power on/off signal
PN2 - SMI Switch
There is no specific orientation. Connect the two-thread cable to the PN1
connector pins on the mainboard. Since most cases do not support this feature,
most of you should ignore this instruction. Furthermore, this feature is not
necessary as it is already a part of the mainboard.
Pin number Name or significance of signal
10 SMI signal
11 GND
PN2 - HDD LED connector
This connector has a specific orientation. Connect the two-thread IDE LED
connector cable attached to the case to the IDE LED connector on the mainboard.
Pin number Name or significance of signal
6 LED’s Cathode
7 LED’s Anode
PN1 - Speaker connector
There is no specific orientation. Connect the four-thread speaker cable to the
PN1 connector pins on the mainboard.
Pin number Name or significance of signal
4 +5VDC
5 Ground
6 Ground
7 Sound Signal