LG 60PB4DT-UB (CHASSIS:PA72A) Service Manual ▷ View online
- 25 -
BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
1. Check follow
1-2. When it is normal output of the TUNER
.
Is normal the main of D/W MODE?
Is normal the sub of D/W MODE?
Is it 9V #42 of CXA2069(IC101) ?
Is normal #56 output of CXA2069(IC101)?
FIG1
Is it 9V #42 of CXA2069(IC101) ?
Is normal #44 output of CXA2069(IC101)?
FIG1
Is normal
outpu
of FMS6400(IC702) ?
FIG2
Is normal UPD64015 Power(1.5V,3.3V)
Is
noramlly
connected P101 to P1612 ?
Flat cable
Is
noraml
output of
UPD64015
(IC701)?
Digital Output Y(10bit),C(10bit),H/V,FID
FIG1
FIG2
(TV/CATV mode does not display .)
DCR DVR RF MODE
Is normal
outpu
of FMS6400(IC704) ?
FIG2
Is normal UPD64015 Power(1.5V,3.3V)
Is
noraml
output of
UPD64015
(IC701)?
Digital Output Y(10bit),C(10bit),H/V,FID
- 26 -
BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
COMPONENT/RGB/HDMI/DVI
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
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)
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
- 27 -
BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
DCR COMPONENT/RGB
Check Signal format
(supported format?)
Check CXA2181(IC1702)
Power
Pins, Osc
,
Comp1(#41,#42,#43),
Comp2(#1,#2,#17),
RGB(#33,#34,#35,#36,#37)
Check CXA2181
(IC1702
)
outputs
#23(Y_out),#22(Cb_out),
#21(Cr_out),#15(V),#16(H)
Check MC14053B(IC1703)
Check MST3361(IC603)
Power pins,#44(
Y_in),
#41(Cb_in),#46(Cr_in)
#37(H),#38(V)
Check CPLD (IC301)
HD(#96),VD(#95)
Check CPLD (IC301)
1
2
3
4
6
H/V
NG
7
Check MST3361(IC603) Outputs V-
out (#99) , H-out (#98) , Clock (#96)
, Data (30Bit) , DE(#97)
8
Check CY2309 (IC203)
REF(#1), CLKA4(#15)
8
Digital Board
7 : _Check the
MST3361(IC603) Output Signals
(V
sync
) :
(DE) :
(C
lk
) :
(H
sync
)
59.94Hz
Frequency : Different according to
format !!
(Data) :
8 : _Check
CPLD (IC301) HD(#96),VD(#95)
6 : _
C
heck MST3361(IC603) Power pins, Input Signals, Signal Shape is Same (above)
9 : _
C
heck CY2309 (IC203) REF(#1), CLKA4(#15)
_Signal shape is same (above)
- 28 -
BLOCK DIAGRAM & TROUBLESHOOTING GUIDE
DCR DVR HDMI/DVI
Snow noise (White dot) ?
Power off and on
(TV or STB/DVD
)
Video is normal & No Sound ?
Check HDCP Power Pin(IC604),
MST3361(IC603)
IIC(#69,#70)
Check MST3361(IC603) inputs
Power, Osc
#25,#26(RX1C-,RX1C+),
#14,#15(RX0C-,RX0C+)
Re-download EDID(IC605,IC606)
Check MST3361(IC603)
Outputs
V-out (#99) , H-out (#98) , Clock (#96)
, Data
Check CY2309
(IC203)
REF(#1), CLKA4(#15)
1
2
3
4
5
6
N
Y
N
Y
YY
Y
Y
Check
CPLD (IC301) V-Sync,
H-Sync Output #95(VD), #96(HD)
1 : _Check HDCP Error
_Retry power off and on (TV or STB/DVD
)
_Check MST3361(IC603) HDCP IIC line (#69,#70)
2 : _Check EDID Download
(RX0C-,RX0C+
) :
Frequency : Different according to
format !!
4 : _Check
MST3361(IC603) Outputs
5 : _Check
CPLD (IC301) V-Sync, H-Sync Output #95(VD), #96(HD)
_Signal shape is same (above)
SCL :
SDA :
3 : _
MST3361(IC603) inputs
(RX1C-,RX1C+
) :
(V
sync
) :
(DE) :
(C
lk
) :
(H
sync
)
59.94Hz
Frequency : Different according to
format !!
(Data) :
6 : _Check
CY2309 (IC203) REF(#1), CLKA4(#15)
_Signal shape is same (above)
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