LG 50PB4DHA-UA / CHASIS / PA75C Service Manual ▷ View online
- 13 -
AV1_Audio
AV2_Audio
MNT_Audio
HDMI
(PC/DTV)
Comp2_Audio
RGB_Audio
Comp1_Audio
[L1 / R1]
[L2 / R2]
[L3 / R3]
[L4 / R4]
[L5 / R5]
Switch
Switch
[Rout/Lout]
I2C SCL/SDA
Audio
Switch
[TEA6420]
AUDIO ADC
[CS5340]
I2S_CLK_IN/DATA_IN
/LR IN
(I2S_MCLK)
SPDIF OUT
Buffer
Buffer
OP AMP
[MC33078]
PWM MODULATOR/
POWER AMP
[NTP3000]
SIF IN
Broadcom
[BCM3553]
AUD_SPDIF
ANA L/R IN
ANA L/R
(MC33078)
ANA L/R
ANA L/R OUT
(CS5340)
BCM_MCLK
BCM_MCLK
I2S_CLK_IN
I2S_DATA_IN
I2S_LR_IN
RESET
RESET
I2S_CLK_OUT
I2S_DATA_OUT
I2S_LR_OUT
(NTP3000)
I2S_CLK_OUT/
DATA_OUT/
LRCH OUT
I2C SCL/SDA
OUT1A/B
OUT2A/B
SPK R
SPK L
MNT_L/R OUT
HDMI Rx
I2S/SPDIF Convert
HDMI_TMDS 0/1/2/CLK
TUNER (ATSC/NTSC )
I2C SCL/SDA
Buffer
Buffer
SIF
IF_P
IF_N
AUD_LEFT/RIGHT P
HDMI_RX_DATA/CLK
ANA L/R OUT
BTSC
Decoder
MPEG2
Dolby
AUDIO
Processor
Signal path for AUDIO/ IF
SPDIF OUT(coaxial)
BCM_MCLK
IF AGC
CVBS
FRONT END
- 14 -
BCM3553
AUDIO S/W(TEA6420)
NTP3000
NVRAM
4.7K
‰
5.0V
I2C_Channel 0
I2C_Channel 1
ATSC/NTSC Tuner
I2C_Channel 2
I2C_Channel 3
I2C0_5V
I2C1_5V
I2C2_2.5V
I2C2_3.3V
I2C3_3.3V
MTV416
4.7K
‰
3.3VST
1K
‰
3.3V
M62320
4.7K
‰
5.0V
LM57(DS1621)
HDCP Key EEPROM
Address
0xC2
0x9A
0x74
0xA6
0x94
0x1C
0x54
0x??
0xD4
PDP MODULE
0x50
I2C MAP
CAT6431 Ready
(only S/W mode)
- 15 -
Block Diagram
Power Sequence and Flow Diagram
P_+19V
P_+19V
IC501
NTP3000
(Sound IC)
BIAS
Speaker R/L
+12.0V
+12.0V
IC806
KA7809
IC500
TEA6420D
(Audio SW)
+9V
IC504
MC33078
(OP AMP)
Digital eye
LCD control B/D
IC901,902
KIA78R09F
(FAN REG)
FAN
FAN
REG
IC
BIAS
Side power
- 16 -
Block Diagram
Power Sequence and Flow Diagram
ST_5V
ST_5V
REG
IC
BIAS
Side power
Local key/IR power
IC202
ICL3232
RS-232C RX/TX
IC404
AZ1117H-3.3
IC406
AT24C16AN
(EEPROM)
+3.3VST_MICOM
IC407
MTV416GMF
(
micom
)
BIAS
HDMI CEC
Inv/RL/live-on
3.3V->5V
BIAS
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