LG 55LH85 Service Manual page 72

Block Diagram
5.0V_TU I2C_CH6
ANT/ NTSC/VSB
CABLE Half-NIM
TUNER
IN
Composite
Video
IN
Component
(Y,Pb,Pr)
IN
RGB
IN
DDC_RGB
FRONT
HDMI
IN
(x4)
BACK
3.3V_VSB 1.2V_VSB
VSB/QAM
IF
Demodulator
I2C_CH2
[LGDT3305]
TS
I2C_CH1
ANALOG
VIDEO
INPUT
FE_VMAIN
AV1_CVBS_IN
AV2_CVBS_IN
PROCESSOR
COMP1-Y/Pb/Pr
COMP2-Y/Pb/Pr
DSUB-R/G/B
[LGE3369A]
HDMI
DIGITAL
VIDEO
INPUT
1.26V_1
CEC_RX
CEC_RX
DDC_RGB
HDMI
Switch
(4-to-1)
3.3V_2
[TDA9996]
1.8V_1
I2C_CH2
I2C_CH4 I2C_CH6
I2C_CH2
3.3V_2
LCD/PDP
DIGITAL TV
LVDS
DUAL Receiver
LVDS
[DTC30LM36]
TX_SEL
1.8V_DDR 3.3V_1
I2C_CH4 3.3V_L
MiCOM
CEC_TX
[WT61P8S]
MEDIA-BOX(VIDEO)
CEC_TX
3.3V_2 1.8V_1
3.3V_2 5.0V_1
HDMI
HDMI
HDMI
30
Transmitter
DeMUX
[SiI9134]
[PI3HDMI1210]
TX_SEL
I2C_CH2
I2C_CH4
HDMI
Receiver
5.0V_ST
[SiI9125]
24
Network
Processor
[SB9120]
RF
Transceiver
[SB9110]
Wireless TX Module
SERVICE
only
3.3V_L
1.8V_L
3.3V_L
2.5V_L
1.0V_L
2.5V_L
1.5V_L
1.2V_L
1.0V_L