User Guide

Installing the Mainboard 2-3
¬ Standard External Connectors
Inside the case of any computer several cables and plugs have to be connected.
These cables and plugs are usually connected one-by-one to connectors located on
the mainboard. You need to carefully pay attention to any connection orientation
the cables may have and, if any, notice the position of the first pin of the connector.
In the explanations that follow, we will describe the significance of the first pin.
PN1 - Keylock connector Please pay attention to pin position and orientation
This connector has a specific orientation. Connect the five-thread keylock
connector cable to the PN1 connector pins on the mainboard.
Pin number Name or significance of signal
1 +5VDC
2 No connection
3 Ground
4 Keyboard inhibit Signal
5 Ground
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.
Computer
Knowledge