Acer AL1931 - 4. VK-903 Function Control key Board; 4.1 Description; 4.2 Connector and Switch Locations; 4.3 Connector type

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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 Maker Number of pins
J1 4500-5 E&T 5
J4 4500-8 E&T 8
J3 87502-0200 ACER 2
J2 87502-0200 ACER 2
D5 LED LED 3
4.4 Connector pin Assignment
4.4.1 J1
Pin NO. Signal Comment
1 L+ Audio Left + Channel Output
2 L- Audio Left – Channel Output
3 GND Audio GND
4 R+ Audio Right + Channel Output
5 R- Audio Right - Channel Output
4.4.2 J4
Pin NO. Signal Comment
1 LED-Y Power saving mode
2 LED-G Monitor is ON
4 GND GND
5 KEY-POWER Power ON/OFF key
6 KEY-AUTO Auto Adjusting and Input Mode Selection
7 KEY-MENU Function Selection enable
8 KEY-UP Function select and Adjust UP
9 KEY-DOWN Function select and Adjust Down