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Service Manual
Model No.:
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 ( J 20 )
Pin number
1
2
3
4
5
Notes:
J 20-Pin 9: Backlight on/off:
The system can turn on or turn off the backlight of TFT LCD Panel through the power
supply unit path.
J 20-Pin 8: System power on / standby
System board will use this pin to control system power.
J 20-Pin 11: Control the luminance of backlight
The system can generate the PWN signal to control the strength of TFT LCD Panel's
backlight through this connector
Signal name
Pin number
1
2
3
4
5
6
7
8
9
10
11
12
13
- 09 -
J20
Signal name
+12V
+12V
GND
GND
GND
+5V
+5V
+5VSTB
POWER ON/OFF
+5V
BL- ON
BL- ADJ U ST
GND
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