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50PN4500-DA (CHASSIS:PB31A) - LG TV Service Manual (repair manual). Page 32

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+3.3V_TU
4. L13 I2C MAP
I2C_SCKM1/GPIO75 
I2C_SDAM1/GPIO76 
AE3
AE2
TU_SCL
TU_SDA
TU305 
TDSN-B601F (0x)
R308 1.5K
R309  1.5K
I2C_SCKM1/GPIO75 
I2C_SDAM1/GPIO76 
AE3
AE2
TU_SCL
TU_SDA
TU304
TDSH-T101F (0x)
+3.3V_TU
R308 1.5K
R309  1.5K
GPIO49
IC400
H6
AMP SCL
+3.3V_AMP
R640 4.7K
R641  4.7K
GPIO49 
GPIO50 
H6
E6
AMP_SCL
AMP_SDA
IC606 
STA380BW (0x) 
I2S_IN_WS/GPIO149 
SPDIF_IN/GPIO152 
B9
B6
P_SCL
P_SDA
P500
LVDS
(module
0 1C)
+3.3V
R450 3.3K
R451  3.3K
I2C_SCKM2/DDCR_CK/GPIO72 
I2C SDAM2/DDCR DA/GPIO71
AA21
AB21
I2C_SCL
I2C SDA
0x1C)
IC503 EEPROM (0xA0)
+3.3V
R452 2.2K
R453  2.2K
I2C_SDAM2/DDCR_DA/GPIO71 
AB21
I2C_SDA
IC503 EEPROM (0xA0)
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