4-2-1 Function Description:
Main Board
Process signal which incept from exterior equipment then translate into signal that panel can display.
4-2-2 Connector definition
Main board connector
Power connectors (CN3)
CN3
Pin number
Signal name
1
+12V
2
+12V
3
BL
4
DIM
5
GND
6
GND
7
SW
Notes:
CN1-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.
System board will use this pin to control system power.
CN1-Pin 4: 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
CN1
Pin number Signal name
Pin number
Signal name
1
IR
6~12
2
5VSB
3
LED_G
4
GND
5
LED_R
Keypad and remote connector (CN1)
Service Manual
Model No.: HL19K2
14
Speaker Connector (CN2)
Pin number
Signal name
1
L+
2
L-
3
R-
4
R+
K6~~K0
