Haier HL22XSL2, Service Manual

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4-2-1 Function Description:
Main Board
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Main board connector
Power connectors (CN1)
CN1
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
CN2 CN3
Pin number Signal name
Pin number
Signal name
1
SB5V 1
GND
2
IR 2
AD1
3
LED_R 3
AD2
4
LED_G
5
GND
Keypad and remote connector (CN2,CN3)
Service Manual
Model No.: HL22XSLW2
14
Speaker Connector (CN4)
Pin number Signal name
1 L+
2 L-
3 R-
4 R+