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Service Manual
Model No.: HL19K2
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)
Pin number
1
2
3
4
5
6
7
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
Keypad and remote connector (CN1)
CN1
Pin number Signal name
IR
1
5VSB
2
LED_G
3
GND
4
LED_R
5
Speaker Connector (CN2)
Pin number
Signal name
1
L+
2
L-
3
R-
4
R+
14
CN3
Signal name
+12V
+12V
BL
DIM
GND
GND
SW
Pin number
Signal name
6~12
K6~~K0
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