Acer AL1731 AL1731 Service Guide - Page 31

4. VK-903 Function Control key Board 4.1 Description The VK-903 is designed to offer a user interfaced control panel which passes and receives signals to and from VL-903 display control board. 4.2 Connector and Switch Locations 4.3 Connector type Location Type J1 4500-5 J4 4500-8 J3 87502-0200 J2 87502-0200 D5 LED 4.4 Connector pin Assignment 4.4.1 J1 Pin NO. 1 2 3 4 5 Signal L+ LGND R+ R- Maker E&T E&T ACER ACER LED Number of pins 5 8 2 2 3 Comment Audio Left + Channel Output Audio Left - Channel Output Audio GND Audio Right + Channel Output Audio Right - Channel Output 4.4.2 J4 Pin NO. 1 2 4 5 6 7 8 9 Signal LED-Y LED-G GND KEY-POWER KEY-AUTO KEY-MENU KEY-UP KEY-DOWN Comment Power saving mode Monitor is ON GND Power ON/OFF key Auto Adjusting and Input Mode Selection Function Selection enable Function select and Adjust UP Function select and Adjust Down 30