50PY3DF-UA (CHASSIS:PA73A) - LG TV Service Manual (repair manual). Page 13

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BLOCK DIAGRAM
ATI
(X260)
I2C Master
AT/NT Tuner
0xC2
HDMI
ADC
(MST3361)
0X9C
Temp.
Sensor
(LM75)
0X94
U-Com
(MTV416)
0x50
I2C_CH1 (+3.3V_L & +5V_L)
I2C_CH2 (+3.3V_L & +5V_L)
I2C_CH3 (+3.3V_L)
Port
Expander
(M62320)
0X74
Audio 
Switch
(TEA6420)
0X9A
DASP
(NTP3000)
0X54
PDP Module
0x1C
VSB/QAM
(LGDT3703)
Main
0X1C
Live
Dead
CS8416A
0X20(W)
0X21(R)
EEPROM
(24LC512)
0xA6
CH1
CH2
CH3
FRC94XYH
0x94
EEPROM
(24LC16)
5V
5V
5V
2.5V
 IIC channel map                                                                                           
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