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Service Manual
Model No.: HL42XLE2
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, CN5)
CN17
Pin number
Signal name
+12V
1
2
+12V
3
GND
4
+12V
5
GND
6
GND
+5V_STB
7
Notes:
CN17-Pin 12: Backlight on/off:
The system can turn on or turn off the backlight of TFT LCD Panel through the power supply
unit path.
CN17-Pin 10: System power on / standby
System board will use this pin to control system power.
CN17-Pin 8: 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
Remote connector (CNE1)
Pin number
Signal name
1
5VS
2
IR-IN
3
LED_R
4
LED_B
5
GND
14
CN17
Pin number
Dimming
8
9
GND
10
PWR_ON/OFF
11
NC
12
BL_ON/OFF
Description
5V
IR
LAMP RED
LAMP BLUE
GND
Signal name
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