DOWNLOAD LG 42PB4DT-UA (CHASSIS:PA72A) (serv.man2) Service Manual ↓ Size: 32.47 MB | Pages: 91 in PDF or view online for FREE

Model
42PB4DT-UA (CHASSIS:PA72A) (serv.man2)
Pages
91
Size
32.47 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
42pb4dt-ua-chassis-pa72a-sm2.pdf
Date

LG 42PB4DT-UA (CHASSIS:PA72A) (serv.man2) Service Manual ▷ View online

- 19 -
BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
  DCR DVR VIDEO PATH
OOB
Cable
LGDT3703
LGDT3703
AV1
AV2
RGB
HDMI1
HDMI2
Monitor Out
AT/NT
NT
LGDT3502
LGDT3502
CXA2069
CXA2069
CXA2181
CXA2181
COMP1
COMP2
uPD64015
uPD64015
uPD64015
uPD64015
S-Card
S-Card
MST3361
MST3361
VSB TP
QAM TP
1394 Out
MUX CPLD [IC301]
HDD
EPF
OOB Data
TP
VSB TP
QAM TP
IF V2
IF
GEM_CVBS
V1
V2
V_S
V_M
Y/C
RGB/ YC
/YCbCr
V1
HD2_CVBS
IF
PPC405GPr
[IC100]
PPC405GPr
[IC100]
Flash Mem
24MB[IC204,IC205]
Flash Mem
24MB[IC204,IC205]
SDRAM
64MB[IC201,IC202]
SDRAM
64MB[IC201,IC202]
CCIR656
Peri Bus
14bit
IEP2
IEP2
LVDS
LVDS
VSB TP
QAM TP
1394 In
CCIR656
TP Out1
MPG656
V/Q TP
TP/D1
Gemstar
Block
Gemstar
Block
DDR-32MB
DDR-32MB
656
TP  I n2
TP  I n1
SiI3512
SiI3512
Peri Bus
PCI Bus
PCI Bus
PCI Bus
TP Out11
VSB TP
QAM TP
TP Out2
CCIR656
V/Q TP
VSB TP
QAM TP
1394 Out
V/Q TP
Peri Bus
TP Out12
656
TP  I n2
TP  I n1
1394 TP_In
IEP3
IEP3
      
       HD 2.4
-TP De-Mux
- MPEG Decoding : MP@HL
-Format Converter
-Host I/F, Memory I/F 
-Digital I/F
-NTSC Encoder
-AC-3 Decoder/SPDIF In/out
Video 
Pre-proc
Motion
Estimator
MPEG-2 SD
Video Enc
EISC
ROM
MEM
Int
Timer,
Bus Master
System Decoder
& De-scramblers
(ATSC/DIRECTV
/ARIB/DVB/OC)
Ch Input
I/F
PVR Up
Controller
Video
Feature
Extractor
PVR Down
Controller
ATAPI I/F
SDRAM I/F
Ch Output I/F
SC-AES
DSC-AES
NTSC/PAL
Decoder
DMA
PCI2.2
Audio
Encoder
SCI I/F
PLL/DLL
LGDT1304(PVR SOC)
IC909
IC908
IC301
IC402
IC804
IC803
IC603
IC1100~03
IC603
IC603
Gemstar Flash Mem
24MB[IC207,IC208]
Gemstar Flash Mem
24MB[IC207,IC208]
IC306
IC305
IC1200
- 20 -
BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
  DCR DVR NO OSD
OOB
Cable
LGDT3703
LGDT3703
AV1
AV2
RGB
HDMI1
HDMI2
Monitor Out
AT/NT
AT/NT
LGDT3703
LGDT3703
LGDT3502
LGDT3502
CXA2069
CXA2069
CXA2181
CXA2181
COMP1
COMP2
uPD64015
uPD64015
uPD64015
uPD64015
S-Card
S-Card
MST3361
MST3361
VSB TP
QAM TP
1394 Out
MUX CPLD
HDD
EPF
OOB Data
TP
VSB TP
QAM TP
V/Q TP
IF V2
IF
GEM_CVBS
V1
V2
V_S
V_M
Y/C
RGB/ YC
/YCbCr
V1
HD2_CVBS
IF
PPC405GPr
PPC405GPr
Flash Mem
24MB
Flash Mem
24MB
SDRAM
64MB
SDRAM
64MB
CCIR656
Peri Bus
14bit
IEP2
IEP2
LVDS
LVDS
VSB TP
QAM TP
1394 In
CCIR656
TP Out1
MPG656
V/Q TP
TP/D1
Gemstar
Block
Gemstar
Block
DDR-32MB
DDR-32MB
656
TP  I n2
TP  I n1
SiI3512
SiI3512
Peri Bus
PCI Bus
PCI Bus
PCI Bus
TP Out11
VSB TP
QAM TP
TP Out2
CCIR656
V/Q TP
VSB TP
QAM TP
1394 Out
V/Q TP
Peri Bus
TP Out12
656
TP  I n2
TP  I n1
1394 TP_In
IEP3
IEP3
      
       HD 2.4
-TP De-Mux
- MPEG Decoding : MP@HL
-Format Converter
-Host I/F, Memory I/F 
-Digital I/F
-NTSC Encoder
-AC-3 Decoder/SPDIF In/out
Video 
Pre-proc
Motion
Estimator
MPEG-2 SD
Video Enc
EISC
ROM
MEM
Int
Timer,
Bus Master
System Decoder
& De-scramblers
(ATSC/DIRECTV
/ARIB/DVB/OC)
Ch Input
I/F
PVR Up
Controller
Video
Feature
Extractor
PVR Down
Controller
ATAPI I/F
SDRAM I/F
Ch Output I/F
SC-AES
DSC-AES
NTSC/PAL
Decoder
DMA
PCI2.2
Audio
Encoder
SCI I/F
PLL/DLL
LGDT1304(PVR SOC)
- 21 -
BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
Check
D1601, D1602,D1603,
D1604(Digital board)
Check
IC1601,Q1600,Q1602,Q1603
Check LGDP4412(IC804)
(DE), (
C
lk
), (
H
sync
), (
V
sync
)
Check THC63LVD103 
(IC803)
#58(DE), #12(Clk), #55(Hsync),
#57(Vsync)
Check P801
#27(DISP_EN), #9(TXCC-),
#10(TXCC+)
Check LVDS 
Cable
Check PDP 
Module
Control board
1
3
4
5
6
1 : _Check the 
D1601, D1602, D1603, D1604 (Digital board)
) ON.
     _Check Power connector.
Y
N
Y
Y
YY
Y
2 : _Check the 
LGDP4412(IC804)
 input signal
#(
Vsync
) :
#(DE) :
#(
Clk
) :
33.75KHz
80.1MHz
#(
Hsync
):
33.75KHz
59.94Hz
3 : _Check the 
THC63LVD103 (IC1302)  
input signal
     _Signal shape is same(above)
4 : _Check the P801
 input signal
#27(DISP_EN) :
#9 (TXCC-)
 :
80.1MHz
3.3V
GND
#9 (TXCC-)
 :
80.1MHz
5 : _Check the 
LVDS Cable
6 : _Check the 
PDP Module control board
  DCR DVR NO OSD
Check LGDT1102F (IC402)
(DE), (
C
lk
), (
H
sync
), (
V
sync
)
2
Y
Check
Power connector
Replace Power board
NY
- 22 -
BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
 DCR DVR RF/AV MODE
OOB
Cable
LGDT3703
LGDT3703
AV1
AV2
RGB
HDMI1
HDMI2
Monitor Out
AT/NT
AT/NT
LGDT3703
LGDT3703
LGDT3502
LGDT3502
CXA2069
CXA2069
CXA2181
CXA2181
COMP1
COMP2
uPD64015
uPD64015
uPD64015
uPD64015
S-Card
S-Card
MST3361
MST3361
VSB TP
QAM TP
1394 Out
MUX CPLD
HDD
EPF
OOB Data
TP
VSB TP
QAM TP
V/Q TP
IF V2
IF
GEM_CVBS
V1
V2
V_S
V_M
Y/C
RGB/ YC
/YCbCr
V1
HD2_CVBS
IF
PPC405GPr
PPC405GPr
Flash Mem
24MB
Flash Mem
24MB
SDRAM
64MB
SDRAM
64MB
CCIR656
Peri Bus
14bit
IEP2
IEP2
LVDS
LVDS
VSB TP
QAM TP
1394 In
CCIR656
TP Out1
MPG656
V/Q TP
TP/D1
Gemstar
Block
Gemstar
Block
DDR-32MB
DDR-32MB
656
TP  I n2
TP  I n1
SiI3512
SiI3512
Peri Bus
PCI Bus
PCI Bus
PCI Bus
TP Out11
VSB TP
QAM TP
TP Out2
CCIR656
V/Q TP
VSB TP
QAM TP
1394 Out
V/Q TP
Peri Bus
TP Out12
656
TP  I n2
TP  I n1
1394 TP_In
IEP3
IEP3
      
       HD 2.4
-TP De-Mux
- MPEG Decoding : MP@HL
-Format Converter
-Host I/F, Memory I/F 
-Digital I/F
-NTSC Encoder
-AC-3 Decoder/SPDIF In/out
Video 
Pre-proc
Motion
Estimator
MPEG-2 SD
Video Enc
EISC
ROM
MEM
Int
Timer,
Bus Master
System Decoder
& De-scramblers
(ATSC/DIRECTV
/ARIB/DVB/OC)
Ch Input
I/F
PVR Up
Controller
Video
Feature
Extractor
PVR Down
Controller
ATAPI I/F
SDRAM I/F
Ch Output I/F
SC-AES
DSC-AES
NTSC/PAL
Decoder
DMA
PCI2.2
Audio
Encoder
SCI I/F
PLL/DLL
LGDT1304(PVR SOC)
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