4-2-1 Function Description:
Main Board
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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.: HL22F2a
14
Speaker Connector (CN2)
Pin number
Signal name
1
L+
2
L-
3
R-
4
R+
K6~~K0
Summary of Contents for HL22F2
Page 10: ...Service Manual Model No HL22F2a 9 2 2 External pictures four faces Front Side Left Side ...
Page 11: ...Service Manual Model No HL22F2a 10 TOP Side Back Side ...
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Page 28: ...Service Manual Model No HL22F2a 7 3 Wiring Connection Diagram 27 ...
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Page 49: ...9 2 Power Supply Board Failure Check Service Manual Model No HL22F2a 48 ...