DOWNLOAD LG 42PB4D-AA (CHASSIS:PB73B) Service Manual ↓ Size: 9.95 MB | Pages: 59 in PDF or view online for FREE

Model
42PB4D-AA (CHASSIS:PB73B)
Pages
59
Size
9.95 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
42pb4d-aa-chassis-pb73b.pdf
Date
PREV: LG 42PB4DA-UA (CHASSIS:PA75C) Service Manual

LG 42PB4D-AA (CHASSIS:PB73B) Service Manual ▷ View online

- 29 -
EXT1/2
AT/NT
TUNER
X260
TP A
TP C
RGB
COMP 1/2
SIF
SIF IN 1
NTP
3000
SIF IN 2
I2S IN 1
I2S IN 2
I2S OUT 1
SPDIF 
ıÛ
CS8416
I2S
I2S
I2S
I2S
S/PDIF
SPDIF
L/R
L/R
L/R
L/R
ANT/Cable
TP
MSP4450K
MNT
OUT
I2S
I2S
I2SI 3
I2SO 1
SC 2
MCLK
MCLK
SPDIF OUT
Optical
Coaxial
HDMI 1/2/3
2. Audio
(7) HDMI No Sound
- 30 -
Check MSP4450K (IC508) outputs
R5039(SCLK), R5040(LRCLK), R5043(DATA)
1
2
3
5
6
7
Follow the procedure of
“
COMMON SOUND OUT
”
Check MSP4450K (IC508) Inputs
R5041(AV1_R), 5042(AV1_L),
R5045(AV2_R), R5046(AV2_L),
R5048(CMP1_R),R5049(CMP1_L),
R5051(CMP2_R),5052(CMP2_L),
R5055(RGB_R), R5058(RGB_L)
Check 
AV/COMPONENT/RGB
 Cable
Check X260 (IC101) Inputs
R175(SCLK), R176(LRCLK), R177(DATA)
Check MSP4450K (IC508)  X-
tal
 Input
X-tal
 Input (71,72pin)
Check MSP4450K (IC508) Power
4
AV/Component/RGB No Sound
AV/Component/RGB No Sound
Check CS8416 (IC501)  inputs
HDMI_SPDIF (C5005)
1
2
3
4
5
Follow the procedure of
 “
COMMON SOUND OUT
”
6
Check MST3361 (IC402)  output
HDMI_SPDIF (R409)
Check HDMI Cable
Check X260 (IC101) Inputs
SCLK(R175), LRCLK(R176), DATA(R177)
Check CS8416 (IC501)  outputs
DATA(#26), SCLK(#27), LRCLK(#28)
HDMI No Sound
HDMI No Sound
2. Audio
(8) AV/Component/RGB No Sound  / HDMI No Sound
- 31 -
BLOCK DIAGRAM
X260
X260
Sub
Micom
Sub
Micom
SubMicom
EEPROM
SubMicom
EEPROM
CPU
EEPROM
CPU
EEPROM
Ch.1
Sub Micom 
I
2
C Channel
Master
MST
3361
MST
3361
33
Ω
22
Ω
22
Ω
22
Ω
0Ω
4.7k
Ω
3.3VST_MICOM
I2C_A
I2C_B
I2C_C
+3.3V_L
10k
Ω
+3.3V_L
10k
Ω
+3.3V_L
10k
Ω
MSP
4450K
MSP
4450K
22
Ω
2N7002
2N7002
CS
8416
CS
8416
22
Ω
NTP
3000
NTP
3000
100
Ω
33pF
Panel
Panel
22
Ω
2N7002
2N7002
+3.3V_L
2K
Ω
Analog
Tuner
Analog
Tuner
4.7
Ω
10pF
M62320
(FAN)
M62320
(FAN)
100
Ω
LM75
LM75
100
Ω
Ch.2
Ch.3
0x50
0xA0
0xC2
0x9C
0x20
0x94
0x54
0x80
0x74
Digital
Tuner
Digital
Tuner
22
Ω
*
0x1C
0xA6
CH1
Ready
+5V_TU
6.8k
Ω
+3.3V_L
2K
Ω
0x1C / 80
+5V_TU
5.6k
Ω
Data Line and Clock Line 
circuit Identity
 
- 32 -
ATI
X260
ATI
X260
COMP1
RGB
HDMI2
COMP2 
AV1 
AV2 
8
8
HDMI3
Rx C/0/1/2 
±
Rx C/0/1/2 
±
Data 8bit
TP1 
12
MAIN
RGB 30bit
63LVD103
LVDS Tx
63LVD103
LVDS Tx
LVDS
Conn
LVDS
Conn
Video
Scaler
0
Analog
Front
End
Analog_TUNER 
3
1
CVBS,Y,C
CVBS,Y,C
3
CVBS 
Y/Pb/Pr 
3
3
Y/Pb/Pr 
3
R/G/B/H/V 
5
R/G/B  28bit 
32
34
TPA
Digital
Input
Y/Pb/Pr 
CLK/EN/H/V
CLK/EN/H/V 4bit 
HD
 
CLK/Valid/Error/Sop 4bit
PDP : DISP_En 1bit 
LCD : Panel_CTL 1bit 
1
CVBS 
MNT Out 
Analog
Video
OUT
STMAV335
3:1 
DEMUX
STMAV335
3:1 
DEMUX
HDMI1
8
Rx C/0/1/2 
±
3:1 
DEMUX
3:1 
DEMUX
MST3361
2HDMI +
3ADC
MST3361
2HDMI +
3ADC
8
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