LG 47LH70YR (CHASSIS:LP91D) Service Manual ▷ View online
- 17 -
BLOCK DIAGRAM
RG
B
_
P
C
PC
_
A
u
d
io
TV
(R
F
)
COM
P
1
HDM
I1
HDM
I2
HDM
I3
R
S
232
TX
2
32C
D
riv
e
r
S
T
3232C
Tx
/
R
x
:
±
15V
p
p
P
C
_
R
/
G
/B
/H
S
/
V
S
PC
_
A
u
d
io
_
L
/
R
:
700m
V
rm
s
MN
T
_
V
O
U
T
:
1V
p
p
AV
2
_
V
IN
:
1V
p
p
AV
2
_
LI
N
/
R
IN
:
500
mV
rm
s
L
_
S
PK_
O
U
T
R
_
S
PK_
O
U
T
EEP
R
O
M
24C
02
Co
m
p
1
_
L
/
R
:
500m
V
rm
s
TU
N
E
R
AV
1
_
V
IN
:
1V
p
p
AV
1
_
L
IN/
R
IN
:
500m
V
rm
s
PW
M
N
T
P
3100L
MNT
_
O
U
T
MNT
_
LO
U
T
/
R
O
U
T
:
500
mV
rm
s
AV
2
M
A
IN
SC
A
L
ER
LGE
3
7
6
x
A
TX
D
/
R
X
D
:
5V
D
ig
it
a
l
COM
P
1
_
Y
/
P
b
/
P
r
:
1/
0.
7V
p
p
COM
P
2
_
Y
/
P
b
/
P
r
:
1/
0.
7V
p
p
IR
HDM
I_
DA
T
A
_
1
HDM
I_
DA
T
A
_
2
TU
_
M
A
IN
S I
F
CO
M
P
1
_
Y
/
P
b
/
P
r
:
1/
0.
7V
p
p
AV
1
_
V
IN
PC
_
A
u
d
io
_
L
/
R
COM
P
1
_
L
IN
/
R
IN
L_
C
H
R_C
H
FR
CL
VDS
con
nec
tor
TU
_
M
A
IN
M
_
SC
L
/
SD
A
M
_
SC
L
/
SD
A
EEP
R
O
M
24C
02
SI
F
AV
1
_
LI
N/
R
IN
MNT
_
L
/
R
O
U
T
AV
1
MN
T
_
OUT
Co
m
p
2
_
L
/
R
:
500m
V
rm
s
CO
M
P
2
_
Y
/
P
b
/
P
r
:
1/
0.
7V
p
p
COM
P
2
_
L
IN
/
R
IN
COM
P
2
P
C
_
R
/G
/B
/H
S
/
V
S
DDC_SCL1/SDA1
DDC_SCL1/SDA2
DDC_SCL1/SDA3
DS
U
B
_
S
CL
/S
DA
MNT
_
V
O
UT
AV
2
_
V
IN
AV
2
_
LI
N/
R
IN
IIS
_
O
U
T
US
B
US
B
_
D
P
/
D
N
AU
D
IO
AM
P
HDM
I_
DA
T
A
_
3
TM
D
S
TM
D
S
TM
D
S
EEP
R
O
M
24C
02
FUL
LH
DL
VD
Sc
on
ne
cto
r
FR
C
IC
L
G
E
7329A
UR
S
A
_
[C
~
D
]
UR
S
A
_
[
A
:B
]
OP
C_
E
N
D
D
R2
S
D
RA
M
(2
*
256M
B)
S
e
ri
al
F
las
h
PS
U
RL
_
O
N
/
I-D
IM
M
IN
G
/
D
IS
P
_
E
N
PA
N
E
L
_
ST
A
T
U
S
E-
D
IM
OP
C
_
O
U
T
Bl
u
e
to
o
th
Ci
rc
u
it
BL
T
_
D
P
/
D
N
D
D
R2
S
D
RA
M
(512M
B
)
EEP
R
O
M
(256K
)
Se
ri
a
l F
la
s
h
(8
M
B
y
te
)
EEP
R
O
M
fo
r H
D
C
P
(8
K
)
EEP
_
S
C
L
/
S
D
A
EEP
_
S
C
L
/
S
D
A
M
E
M
C
_
R
XE2
±
M
E
M
C
_
R
XE4
±
ME
M
C
_
R
X
C
3±
ME
M
C
_
R
X
C
±
M
E
M
C
_
R
XE1
±
M
E
M
C
_
R
XE0
±
ME
M
C
_
R
X
O
2±
ME
M
C
_
R
X
O
4±
ME
M
C
_
R
X
O
3±
ME
M
C
_
R
X
O
C±
ME
M
C
_
R
X
O
1±
ME
M
C
_
R
X
O
0±
EEP
R
O
M
24C
02
M
_
SC
L
/
SD
A
- 18 -
121
300
200
200T
400
805
804
803
801
802
910
900
A10
510
580
570
310
500
806
540
550
560
530
820
122
120
830
200N
A2
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
TMDS2_RX1+
CAT24C02WI-GT3
IC302
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
DDC_SCL1
TMDS3_RX1-
2SC3875S
Q302
E
B
C
DDC_SDA1
100
R306
TMDS1_RX2+
TMDS3_RX0+
2SC3875S
Q300
E
B
C
10K
R300
JP305
JP303
10K
R301
1K
R303
TMDS2_RX0+
TMDS3_RX2+
+5V_HDMI_3
100
R331
100
R307
TMDS2_RX2+
0.01uF
C302
TMDS1_RXC-
100
R329
+5V_HDMI_1
DDC_SCL2
CEC
1K
R302
DDC_SDA2
100
R304
TMDS3_RXC-
TMDS1_RX0+
CAT24C02WI-GT3
IC301
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
+5V_HDMI_2
KDS184S
D302
A1
C
A2
100
R317
TMDS1_RX1+
TMDS2_RXC-
TMDS1_RXC+
CAT24C02WI-GT3
IC300
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
0.01uF
C301
CEC
JP302
2SC3875S
Q301
E
B
C
0.01uF
C300
TMDS2_RX0-
+5V_HDMI_2
KDS184S
D300
A1
C
A2
TMDS3_RXC+
DDC_SCL3
HPD_MST_2
DDC_WP
DDC_WP
HPD_MST_1
TMDS2_RX2-
TMDS1_RX0-
TMDS3_RX0-
1K
R314
KDS184S
D301
A1
C
A2
JP304
100
R327
TMDS1_RX1-
TMDS1_RX2-
TMDS2_RX1-
+5V_HDMI_1
TMDS3_RX1+
HPD_MST_3
100
R318
+5V_HDMI_3
100
R305
CEC
TMDS3_RX2-
TMDS2_RXC+
10K
R312
DDC_SDA3
DDC_WP
+5V_MULTI
+5V_MULTI
+5V_MULTI
CEC
0
R313
68K
CEC_READY
R315
CEC_C
MMBD301LT1G
30V CEC_READY
D303
CDS3C30GTH
30V CEC_READY
D304
+3.3V_MST
BSS83
Q303
CEC_READY
CEC_READY
S
B
D
G
YKF45-7058V
EAG59023302
JK303
14
14
NC
13
13
CEC
55
DATA1_SHIELD
20
20
12
12
CLK-
11
11
CLK_SHIELD
22
DATA2_SHIELD
19
19
HPD
18
18
+5V_POWER
10
10
CLK+
44
DATA1+
11
DATA2+
17
17
DDC/CEC_GND
99
DATA0-
88
DATA0_SHIELD
33
DATA2-
16
16
SDA
77
DATA0+
66
DATA1-
15
15
SCL
YKF45-7058V
EAG59023302
JK302
14
14
NC
13
13
CEC
55
DATA1_SHIELD
20
20
12
12
CLK-
11
11
CLK_SHIELD
22
DATA2_SHIELD
19
19
HPD
18
18
+5V_POWER
10
10
CLK+
44
DATA1+
11
DATA2+
17
17
DDC/CEC_GND
99
DATA0-
88
DATA0_SHIELD
33
DATA2-
16
16
SDA
77
DATA0+
66
DATA1-
15
15
SCL
YKF45-7054V
EAG59023301
JK301
14
14
NC
13
13
CEC
55
DATA1_SHIELD
20
20
12
12
CLK-
11
11
CLK_SHIELD
22
DATA2_SHIELD
19
19
HPD
18
18
+5V_POWER
10
10
CLK+
44
DATA1+
11
DATA2+
17
17
DDC/CEC_GND
99
DATA0-
88
DATA0_SHIELD
33
DATA2-
16
16
SDA
77
DATA0+
66
DATA1-
15
15
SCL
10K
R308
10K
R310
10K
R309
10K
R320
10K
R311
10K
R319
56000
READY
R316
EAX58298501
Mstar LCD LH70
2008/09/20
H6 LH70
2 9
INPUT-HDMI
HDMI3
HDMI2
HDMI1
USB_DP
USB_DN
+5V_USB
10uF
OCP_READY
C204
30V
D207
READY
30V
D208
READY
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
0.1uF
OCP_READY
C203
1KOCP_READY
R204
MIC2009YM6-TR
OCP_READY
IC201
3
ENABLE
2
GND
4 FAULT/
1
VIN
6 VOUT
5 ILIMIT
4.7K
OCP_READY
R205
KJA-UB-0-0037
JK200
1
1
2
3
4
5
120-ohm
OCP_READY
L202
0
Non_OCP
R202
10uF
6.3V
C201
500
L200
0 R200
0 R201
100uF
16V
16V
C200
100uF
16V
16V
C202
100uF
16V
16V
C205
KDS226
OCP_READY
D213
A
AC
C
510
OCP_READY
R238
160
OCP_READY
R203
DSUB_SDA
+5VST_MST
DSUB_SCL
100
R119
4.7K
R128
0 . 0 1 u F
C113
100
R110
100
R120
4.7K
R129
CAT24C02WI-GT3
IC100
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
4.7K
R154
READY
DDC_WP
USB
**1A Design
I t s p o s s i b e l
to 27~47ohm
EAX58298501
Mstar LCD LH70
2008/09/20
H6 LH70
1 9
INPUT-USB
P i n t o P i n w i t h
EAN43439401
c l o s e t o J K 2 0 0
PC EDID
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
0.1uF
C411
+3.3V_MST
KEY2
120ohm
L403
2SC3052
Q404
IR-OUT
E
B
C
+5VST_MST
IR
+3.3V_MST
2SC3052
Q405
IR-OUT
E
B
C
KEY1
22
IR-OUT
R430
ZD401 ESD_READY
47pF
C403
4.7K
R420
0.1uF
C408
470pF
C404
+3.3V_MULTI_MST
120ohm
L406
10K
IR-OUT
R428
IR_OUT
500-ohm
L411
0
R403
4.7K
R421
SUB_SDA
0
R400
ZD400 ESD_READY
120ohm
L402
0.1uF
C407
READY
500-ohm
L410
ZD402 ESD_READY
SUB_SCL
+5VST_MST
10
K
IR-OUT
R427
47K
IR-OUT
R426
470pF
C412
+5VST_MST
10
K
IR-OUT
R429
0.1uF
C414
SPK_N
10K
R404
0
R401
READY
0
R402
47uF
16
V
C406
6630V90141J
P400
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
120-ohm
L404
120-ohm
L407
PC_AUD_R
PC_B
SIDE_LIN
S_VIDEO_DET
COMP2_L
COMP1_L
PC_AUD_L
M_SCL
TV_MAIN
COMP1_Y
MNT_LOUT
+5V_TUNER
COMP2_PR
MUTE_LINE
MNT_ROUT
IR_OUT
COMP2_R
COMP2_PB
DSUB_SDA
PC_G
PC_VS
COMP1_R
COMP2_Y
SIDE_V
SIDE_Y
+5V_MULTI
+3.3V_MST
CVBS_RIN
M_SDA
TXD
PC_R
COMP1_PR
PC_HS
SIDE_RIN
SIDE_C
502500-7011
P401
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
CVBS_VIN
MNT_VOUT
MAIN_SIF
RXD
DSUB_SCL
COMP1_PB
CVBS_LIN
CONTROL KEY
EAX58298501 Mstar LCD LH70
2008/09/20
H6 LH70
3 9
CONTROL & INTERFACE
INTERFACE
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