LG 47LC7DF (CHASSIS:LA73A) Service Manual ▷ View online
- 17 -
TROUBLESHOOTING & BLOCK DIAGRAM
ATI
X2
60
ATI
X2
60
SIF
NT
P3
000
NT
P3
000
I2S
SP
DI
F
I2S
CV
BS
(N
T
M
ai
n)
DD
R2
64MBx
2
DD
R2
64MBx
2
Flex Bu
s
RG
B
3
0bi
t
TPA
A
nal
og
Front
En
d
U
SB 1.1
I2C
P
ort0
I2C
C
H
1
I2C
C
H
2
I2C
C
H
3
MTV415
Mic
om
MTV415
Mic
om
U
SB (up
grade rea
dy!!)
Dea
d IC w
hen
Sta
ndby
Dea
d IC w
hen
Sta
ndby
Vi
de
o
Sc
al
er
0
Vi
de
o
Sc
al
er
1 or 2
Al
iv
e IC w
hen Sta
ndby
Al
iv
e IC w
hen Sta
ndby
Aud
io
Vide
o
TP
AV
2
/ L/R
MNT Out
L/
R
COMP1 L/R
COMP2 L/R
RGB L/R
TP_IN1
AV
1
AV
2
AV
1,
Y/
C1
AV
2,
Y/
C2
Flash
(NOR 32MB)
Flash
(NOR 32MB)
Latch
x
2
Latch
x
2
24C
51
2
24C
51
2
Cable
AT/N
T
VSB
LGDT
3303
VSB
LGDT
3303
63L
V
D
1023
63L
V
D
1023
10
80P
LV
D
S
Con.
10
80P
LV
D
S
Con.
Dual
AV
1
/ L/R
GPIO
I2S
ATI
X260
(# of
MPEG de
cod
er)
COMP2
RGB
CS
84
16
CS
84
16
HDMI
SPDI
F
I2S
I2S
MST336
1
1H
DMI +
1A
D
C
MST336
1
1H
DMI +
1A
D
C
RGB
HD
M
I1/2/3
SP
DI
F
SP
DI
F
Opt.
FRC
94
xyH
FRC
94
xyH
DD
R1
16MB
DD
R1
16MB
RGB odd
RGB ev
en
120
H
z
TPB
U
SB 1.1
U
SB(
EMF)
PCI
3:1
Demux
3:1
Demux
24C
16
24C
16
Air
3:1
Demux
3:1
Demux
MSP4
45
0K
MSP4
45
0K
I2S
SIF
- 18 -
AT
I
(X
260
)
I2C Ma
st
er
AT
/N
T Tune
r
0x
C2
HDMI
ADC
(M
ST
3361
)
0X9
C
Tem
p.
Se
nsor
(LM7
5)
0X94
U-Com
(MTV
416
)
0x50
I2C_CH
1
(+3.
3V
_
L
&
+5V
_
L)
I2C_CH
2
(+3.
3V
_
L
&
+5V
_
L)
I2C_CH
3
(+3.
3V
_
L)
Po
rt
Ex
pande
r
(M
62320
)
0X74
Au
dio
Sw
itc
h
(M
SP
4450K
)
0X80
DAS
P
(N
TP
3000
)
0X54
PD
P M
odu
le
0x1
C
VS
B/QAM
(L
GD
T3703
)
Main
0X1
C
Live
D
ead
CS
8416A
0X20
(W
)
0X21
(R
)
EE
PRO
M
(24L
C512
)
0x
A6
CH1
CH2
CH3
F
RC
94XY
H
0x
D4
EE
PRO
M
(24L
C16
)
5V
5V
5V
2.5
V
- 19 -
+
12.0V
+
12.0V
+6
.0
V
+6
.0
V
CS
4344
CS
4344
CS
5340
CS
5340
PQ05
D
Z
1U
PQ05
D
Z
1U
KI
A
7
8R09
KI
A
7
8R09
FAN
1
FAN
1
KIA
7
8R09
KIA
7
8R09
FAN
2,
3
FAN
2,
3
MC
33078
MC
33078
X260
X260
HY
B18
T512
(4EA
)
HY
B18
T512
(4EA
)
AZ
1117
H
-1.8
AZ
1117
H
-1.8
LM7
5
LM7
5
IC
L3232
CB
N
Z
IC
L3232
CB
N
Z
+5
.0
VS
T
+5
.0
V
S
T
+3
.3
V_L
+3
.3
V
_L
AT
/N
T Tune
r
AT
/N
T Tune
r
+5V
_
L
+5.
0V
S
I3865
S
I3865
PQ
05
D
Z
1U
PQ05
D
Z
1U
Live Power
Dead Power
Live-o
n
AZ
1117
H
-3.3
AZ
1117
H
-3.3
LG
D
T
3703
(M
AIN
)
LG
D
T
3703
(M
AIN
)
SC
1565
-1.8
SC
1565
-1.8
IS
L6549
CB
IS
L6549
CB
1.2
V
1.8
V
IS
L6549
CB
IS
L6549
CB
1.8
V
MK
3727
D
MK
3727
D
74LV
T16373
(2
EA
)
74LV
T16373
(2
EA
)
S29GL256
S29GL256
TH
C
63LV
D
1023
T
HC
63LV
D
1023
+3.
3V
_
L
HY
B18
T512
(4EA
)
HY
B18
T512
(4EA
)
MK
3727
D
MK
3727
D
+
19.0V
+
19.0V
NT
P3000
NT
P3000
NT
P3000
NT
P3000
1.8
V
BA033
FP-3
.3
BA033
FP
-3
.3
MTV
416
MTV
416
AZ1086
-1
.8
AZ1086
-1
.8
AZ
1117
H
-3.3
AZ
1117
H
-3.3
SC
1565
-2.5
SC
1565
-2.5
MS
T
3369
MS
T
3369
9.0
V
TE
A6420
TE
A6420
9.0
V
CS
8416
CS
8416
KIA
7
8R09
KIA
7
8R09
MK
3727
D
MK
3727
D
MI
C
2505
MI
C
2505
3.
3V
ST
_MIC
OM
24
C08
24
C08
FR
C
94XY
H
F
RC
94XY
H
Live-o
n
24
C512
24
C512
ST
MA
V335
ST
MA
V335
ISP1504
ISP1504
MI
C
2505
MI
C
2505
K
IA7805
K
IA7805
AZ
1085
S
-3.3
AZ
1085
S
-3.3
AZ
1085
S
-1.8
AZ
1085
S
-1.8
24
C16
24
C16
FRC
FRC
SC
1565
-2.6
SC
1565
-2.6
MI
C
3910
-2
.5
MI
C
3910
-2
.5
SC
1592
-1.0
SC
1592
-1.0
12.0
V
HY
5D
U281622
HY
5D
U281622
SC
2595
-1.0
SC
2595
-1.0
- 20 -
ATI
X2
60
ATI
X2
60
SIF
NT
P3
000
NT
P3
000
I2S
SP
DI
F
I2S
CV
BS
(N
T
M
ai
n)
DD
R2
64MBx
2
DD
R2
64MBx
2
Flex Bu
s
RG
B
3
0bi
t
TPA
A
nal
og
Front
En
d
U
SB 1.1
I2C
P
ort0
I2C
C
H
1
I2C
C
H
2
I2C
C
H
3
MTV415
Mic
om
MTV415
Mic
om
U
SB (up
grade rea
dy!!)
Dea
d IC w
hen
Sta
ndby
Dea
d IC w
hen
Sta
ndby
Vi
de
o
Sc
al
er
0
Vi
de
o
Sc
al
er
1 or 2
Al
iv
e IC w
hen Sta
ndby
Al
iv
e IC w
hen Sta
ndby
Aud
io
Vide
o
TP
AV
2
/ L/R
MNT Out
L/
R
COMP1 L/R
COMP2 L/R
RGB L/R
TP_IN1
AV
1
AV
2
AV
1,
Y/
C1
AV
2,
Y/
C2
Flash
(NOR 32MB)
Flash
(NOR 32MB)
Latch
x
2
Latch
x
2
24C
51
2
24C
51
2
Cable
AT/N
T
VSB
LGDT
3303
VSB
LGDT
3303
63L
V
D
1023
63L
V
D
1023
10
80P
LV
D
S
Con.
10
80P
LV
D
S
Con.
Dual
AV
1
/ L/R
GPIO
I2S
ATI
X260
(# of
MPEG de
cod
er)
COMP2
RGB
CS
84
16
CS
84
16
HDMI
SPDI
F
I2S
I2S
MST336
1
1H
DMI +
1A
D
C
MST336
1
1H
DMI +
1A
D
C
RGB
HD
M
I1/2/3
SP
DI
F
SP
DI
F
Opt.
FRC
94
xyH
FRC
94
xyH
DD
R1
16MB
DD
R1
16MB
RGB odd
RGB ev
en
120
H
z
TPB
U
SB 1.1
U
SB(
EMF)
PCI
3:1
Demux
3:1
Demux
24C
16
24C
16
Air
3:1
Demux
3:1
Demux
MSP4
45
0K
MSP4
45
0K
I2S
SIF
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