LG 19LC2D (CHASSIS:LA75E) Service Manual ▷ View online
- 13 -
2. No RASTER
Check LED status
On Display Unit.
Fail
Pass
Repeat No power (1) process.
Check
IC701,IC702,IC703,
IC705,IC706,IC709,
IC705,IC706,IC709,
IC710.
Pass
Fail
Change IC701, IC702, IC703, IC705,
IC706, IC709, IC710.
IC706, IC709, IC710.
Check Input/output
of IC100.
Fail
Change IC100.
Pass
Change panel link cable or module.
Check inverter
connector or
inverter.
Pass
Check panel link
cable or module.
Pass
Check Input source Cable and Jack.
Fail
Fail
Change inverter connector or inverter.
3. No Raster on AV(AV/ COMPONENT/
S-Video, RGB-PC) signal
4. No Raster on TV(RF) Signal
- 14 -
Check input source cable and jack.
Repeat No power
(1) process.
Fail
Check the
output of TU600.
Pass
Pass
Fail
Check 5V of TU600.
Re-Soldering or change
the defect part.
Re-Soldering or change
the defect part.
Check
the signal of R602,
R622, R623,R615,R616,
R617,R640,R641,
R642.
Fail
Change L804, L1002,
L1003, L1004.
L1003, L1004.
Pass
Check input/output
of IC100.
Pass
Fail
Re-soldering of Change defect part.
Check the X100.
Check the X100.
Pass
Pass
5. No sound
- 15 -
Check the
input Source.
Fail
Pass
Change the source input.
Check input/
Output of IC100.
Fail
Pass
Re-soldering of Change the defect part.
Check the X110
Check the X110
Check the input/
output of IC500
Fail
Re-soldering or Change the defect part.
Pass
Check the Speaker.
Pass
Check the Speaker wire.
Fail
Change the Speaker.
- 16 -
Re
a
r A
V
_
1
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L
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Re
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1
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1
IN
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28M
(D
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128M
(D
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CL
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25
M
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62
12
A
B
28
72A
IF
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P
IF
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N
LV
D
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(8
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)
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12
M
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(A
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0-7
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(V
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(D
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PC
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Tx
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(M
X
2
3
2
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P
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P
0
0009A
0I
M
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23
2162A
EEPR
O
M
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M
M
R
0
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14
A
ST
-
5
V
EE
PR
OM
(
5
1
2
K
)
2
4
C
512
0I
M
M
R
A
L
0
25
A
Fla
s
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3
2
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)
M
25L
3
2
05M
I
3.
3
V
KE
Y
_
C
T
L
[
1
,2
]
Po
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r/
L
IP
S
Po
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r
15
V
/
S
T-5
V
US
B
(S
W
Up
g
ra
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6612F
0
0099A
E
A
G
3
1022001
US
B
_
DM
[
2
5
1
]
US
B
_
DP
[
2
5
2
]
US
B
_
O
CD_
N
[
8
3
]
AU
R
_
IN
[
5
9
]
AU
L_
IN
[
5
8
]
Tx_
O
u
t
Rx
_I
n
661
2
B
0
0015C
HDM
I
HP
DC
T
R
L
[
1
2
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D
D
C
D
A_
S
D
A[
1
4
]
DDCDA_
S
C
L
[
1
5
]
TX
C
L
K
-[
2
]
TX
C
L
K+
[
3
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POW
E
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1.
2
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[16]
[15]
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B
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SI
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F
P
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M
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TU
N
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MSC
L
MS
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A
[
2
0,
22
,
2
4,
26
,
27,
28,
29
,
3
1]
5V
[3
]
SD
A
[
7
]
SC
L
[
8
]
[P
:1
0
]
[12]
[N
:1
1
]
IF
_
A
G
C
C
V
B
S
0[
44
]
3.
3V
3.
3.
3V
M
P
23
05D
S
15
V
1
1
2V
3.
3V
AV
DD_
DV
I
2.
5V
V
DD_
DDR
G-
5
V
23
"
19
"/
20
"/
22
"
CL
K
_
5
7
M
H
z
C
L
K
_
20
0M
H
z
12
V
ST
-
5
V
R2
3
2
C
_
T
x
R2
3
2
C
_
Rx
DDC
_
S
DA/
U
A
R
T
_
T
X
DD
C_
S
C
L
/
UA
R
T
_
R
X
663
0
G
7
0016
A
66
12J
1
003
1
A
H
Y
5D
28162
2
L
C
D
.5
V
BLOCK DIAGRAM
1. MAIN BOARD
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