LG SJ4Y - Troubleshooting; General Troubleshooting Issues; Remote Control and Power Issues

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Only for training and service purposes.
DSP
MAIN/AMP PCB
Micom
27 MHz
MTK_RST/TX/RX
DDR3
DCDCs
P_CTRL
Optical In
Wireless
Module 1, 2
Serial
Flash
Serial
Flash
SPI
WL_MUT/RST/INT/MSG_RDY/I2C
SPI
USB (Playback)
HDMI IN HDMI OUT
BT_SPDIF
KEY
FL 40 W
AMP
TL 20 W
PWM_RST MUTE I2C_DAT I2C_CLK
M_BCK/LRCK/DATA0,1,2
FR P,N / TWR P,N PWM_DATA2/LRCK/BCK
Potable in
Analog_L /R
ADC
PTB_DET
PWM IC
AMP
FL 40 W
LPF
TL 20 W
FL P,N / TWL P,N
Key PCB
Serial Flash
SPI
Adapter
25 V
Wireless
Active Woofer
200 W
Rear SPK
120 W
Front PCB
Dot LED
(5ea)
IR-Receiver
BT_UART SPDIF USB1+/-
TMDS/HPD/I2C/ARC/CEC TMDS/RX_HPD/I2C /PWR5V/CEC
BT_RESET/STANBY
EMERGENCY/WAKE
I2C/HPD/CEC/EDID_SW
BLOCK DIAGRAMS
1. SYSTEM BLOCK DIAGRAM