LG 42LM660S Service Manual page 60

GP4 Backend block diagram (EPI & T-Con)
CH1/2/3
Main SoC
MTK
CH4/5/6
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Only for training and service purposes
EPI
[TCON7] VCOM_DYN
[TCON8] PMIC_RESET
I2C_SDA2
[OPCTRL11]
I2C_SCL2
[OPCTRL10]
EPI
TXA1N/P, TXACLKN/P, TXA4N/P
GMA[4][5][7][12][15]
IC7700
TPS65178
EPI_LOCK6
TXA0N/P, TXB1N/P, TXB2N/P
VCC18 EPI LEFT
Vcore
H_VDD
VDD
VCOMLFB
EPI_LOCK6_SOURCE
VCOMRFB
VCC18
Vcore
H_VDD
VDD
EPI RIGHT
50Pin
50Pin
LGE Internal Use Only