LG 55G2 Service Manual page 63

L9 Block diagram
PC_L/R_IN
AV_L/R_IN
TR BUF
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Only for training and service purposes
L9
LG1152
TU_SIF
AUD_SCK/LRCK/LRCH
I2C2_SDA/SCL
AMP_MUTE
AMP_RESET
MICOM
SPDIF_OUT
MAIN
4P wafer
LPF
NTP7500
NTP7500
0x54
0x54
LPF
LGE Internal Use Only