User`s manual

Mainboard Installation

3.4 CONNECTORS

3.4.1 CN1 - KEYBOARD CONNECTOR

A standard five-pin female DIM keyboard connector is located at the rear of the keyboard. Plug the

jack on the keyboard cable into this connector.

Pin Description

1 Keyboard Clock

2 Keyboard Data

3Spare

4 Ground

5+5V DC

Table 11

3.4.2 CN2 - POWER SUPPLY CONNECTOR

The power supply connector has twelve-pin male header connectors. Plug the dual connectors from

the power directly onto the board connector.

CN2

Pin Description Pin Description

1 Power Good 7 Ground

2 +5V DC 8 Ground

3 +12V DC 9 -5V DC

4 -12V DC 10 +5V DC

5 Ground 11 +5V DC

6 Ground 12 +5V DC

Table 12

3.4.3 J1 - EXTERNAL BATTERY

The mainboard has a battery on-board; however, user can also attach an external battery to connector

J1. Using an external battery helps to conserve the on-board battery.

Pin Description

1 VDD (6V)

2Not Used

3 Ground

4 Ground

Table 13