Read LG 50PA450T-ZM / 50PA451T-ZG (CHASSIS:PD23B) Service Manual online
4-6. GP4
LM1
I2C MAP
I2C_SCKM1/GPIO75
I2C_SDAM1/GPIO76
I2C_SDAM1/GPIO76
GPIO49
GPIO50
GPIO50
I2S_IN_WS/GPIO149
SPDIF_IN/GPIO152
I2S_IN_SD/GPIO151
I2S_IN_BCK/GPIO150
I2C_SCKM2/DDCR_CK/GPIO72
I2C_SDAM2/DDCR_DA/GPIO71
I2C_SDAM2/DDCR_DA/GPIO71
IC400
AE6
AD6
AB5
AB3
AB3
D9
D7
D7
D8
C8
C8
P23
P24
P24
TU_SCL
TU_SDA
AMP_SCL
AMP_SDA
P_SCL
P_SDA
SUB_SCL
SUB_SDA
I2C_SCL
I2C_SDA
P500
LVDS
LVDS
TU300
TDSS-G201D
TDSS-G201D
IC300
STA368BWG
STA368BWG
P501
KEY/IR PIN8
KEY/IR PIN8
+3.3V_TU
R3082.2K
R309 2.2K
+3.3V
R624 2K
R623 2K
+3.3V_AVDD
R468 3.3K
R466 3.3K
+3.3V_ST
R539 4.7K
R538 4.7K
SCL_3.3V_MOD
SDA_3.3V_MOD
SDA_3.3V_MOD
IC503 EEPROM
IC502 HDCP (OTP)
IC502 HDCP (OTP)
+3.3V_AVDD
R469 2.2K
R468 2.2K
EAX64337201_0
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