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3.2. A Board---- Main Board
3.2.1 Function Description:
Main Board：
Process signal which incept from exterior equipment，then translate into signal that panel can display.
3.2.2 Connector definition
Main board connector
Power connectors(CN3,CN5)
Notes:
CN3-Pin 3: Backlight on/off:
The system can turn on or turn off the backlight of TFT LCD Panel through the power supply unit path.
CN3-Pin 7: System power on / standby
System board will use this pin to control system power.
CN3-Pin 4: Control the luminance of backlight
CN3 CN5
Pin number Signal name Pin number Signal name
1 +12VEXT 1 +12V
2 +12VEXT 2 GND
3 BLON 3 GND
4 ADJ 4 +5V
5 GND 5 STB
6 GND
7 PWR-ON
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