LG 47SL80YR-LA / 47SL80YR-TA / 47SL80YR-TB (CHASSIS:LP91T) Service Manual ▷ View online
- 13 -
TROUBLESHOOTING
No power
(LED indicator off)
Check 24V, 12V, 5,2V
of Power B/D
Check short of Main B/D
or Change Power B/D
Pass
Check Output of
IC1001, IC1003, IC1007
Check P307 Connector
Change LED
Assy
:
[A] PROCESS
Fail
Fail
Pass
Pass
Check LED Assy
Change IC1002,, Q1003
Pass
Check short of IC1001,
IC1003, IC1007
Fail
Re-soldering or Change defect
part of IC1001, IC1003, IC1007
Fail
No Raster
[B]: Process
Check LED status
On Display Unit
Repeat A PROCESS
Pass
Fail
Check Output of IC802
Change IC802
Fail
Change Inverter Connector
Or Inverter
Fail
Pass
Fail
Pass
Change Module
Fail
Check LVDS Cable
Pass
Check Panel Link Cable
Or Module
Change Panel Link Cable
Or Module
Check Inverter Connector
Or Inverter
Pass
- 14 -
No Raster on PC Signal
Check Input source Cable
And Jack
Pass
Re-soldering or
Change the defect part
Change the defect part
Check the Input/Output
Of P401
Fail
Pass
Check the Input/Output
Of IC100
Re-soldering or
Change the defect part,
Check FFC cable
Fail
Pass
Re-soldering or
Change the defect part,
Check RGB EDID Data
Repeat [A], & [B] Process
Pass
Check the Input/Output
Of J104
Fail
Pass
Check the Input/Output
Of IC800
Fail
Re-soldering or
Change the defect part
Pass
No Raster on COMMPONENT Signal
Check Input source
Cable And Jack
Pass
Re-soldering or
Change the defect part
Check The input/Output
Of P401
Fail
Pass
Check the Input/Output
Of IC800
Re-soldering or
Change the defect part
Check FFC Cable
Fail
Pass
Re-soldering or
Change the defect part
Repeat [A], & [B] Process
Check The Input/Output
Of JK101
Fail
Pass
No Raster on HDMI Signal
Check Input source
Cable And Jack
Pass
Check the Input/Output
Of JK301, JK302, JK303
Fail
Re-soldering or
Change the defect part
Pass
Pass
Check the Input/Output
Of IC300, IC301, JK302
Fail
Re-soldering or
Change the defect part
Check HDMI EDID Data
Check HDMI EDID Data
Re-download HDCP
Pass
Pass
Check the Input/Output
Of IC800
Fail
Re-soldering or
Change the defect part
Repeat [A], & [B] Process
- 15 -
No Sound
Check The Input Sourse
Check The Input/Output
Of IC600
Re-soldering or
Change the defect part
Fail
Pass
Pass
Check The Speaker
Change Speaker
Fail
Check The Speaker Wire
Pass
Change The Source Input
Fail
No Raster On AV (Video, S-Video)Signal
No Signal On TV(RF) Signal
Check Input source
Cable And Jack
Pass
Check Input source
Cable And Jack
Pass
Check The Input/Output
Of JK101, JK201
Pass
Re-soldering or
Change the defect part
Pass
Fail
Pass
Check the Input/Output
Of P401
Fail
Re-soldering or
Change the defect part
Check FFC Cable
Repeat [A], & [B] Process
Pass
Check the Input/Output
Of IC800
Fail
Re-soldering or
Change the defect part
Pass
Check The Input/Output
Of TU500
Pass
Re-soldering or
Change the defect part
Pass
Fail
Check the Input/Output
Of P401
Fail
Re-soldering or
Change the defect part
Check FFC Cable
Pass
Check the Input/Output
Of IC800
Fail
Re-soldering or
Change the defect part
Repeat [A], & [B] Process
- 16 -
BLOCK DIAGRAM
RG
B
_
P
C
PC
_
A
u
d
io
TV
(R
F
)
COM
P
1
HD
M
I1
HD
M
I2
HD
M
I3
TX
P
C
_
R
/G
/B
/H
S
/
V
S
P
C
_A
u
d
io
_L
/
R
:
70
0m
V
rm
s
MNT
_
V
O
U
T
:
1V
p
p
AV
2
_
V
IN
:
1V
p
p
AV
2
_
L
IN
/
R
IN
:
500m
V
rm
s
L_
S
P
K
_
OU
T
R
_
SP
K_
O
U
T
EE
PR
O
M
24C
0
2
Co
m
p
1
_
L
/
R
:
500m
V
rm
s
TU
NE
R
AV
1
_
V
IN
:
1V
p
p
AV
1
_
LI
N/
R
IN
:
500m
V
rm
s
PW
M
N
T
P
3100L
MNT
_
O
U
T
MNT
_
LO
UT
/
R
O
U
T
:
500m
V
rm
s
AV
2
MAI
N
S
C
AL
E
R
LG
E
3
7
6
x
A
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
HD
M
I_
D
A
T
A
_
1
HD
M
I_
D
A
T
A
_
2
DDC_
S
C
L
2
/
S
DA
2
TU
_
M
A
IN
S I
F
C
O
M
P
1
_
Y/
Pb
/
P
r
:
1/
0.
7V
p
p
AV
1
_
V
IN
P
C
_A
u
d
io
_L
/
R
COM
P
1
_
L
IN
/
R
IN
L_
C
H
R_
C
H
TU
_
M
A
IN
M_
S
C
L/
S
D
A
EE
PR
O
M
24C
0
2
SI
F
AV
1
_
L
IN/
R
IN
MNT
_
L/
R
O
U
T
AV
1
MNT
_
O
U
T
Co
m
p
2
_
L
/
R
:
500m
V
rm
s
C
O
M
P
2
_
Y/
Pb
/
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_
S
C
L
1
/
S
DA
1
DS
U
B
_
S
CL
/
S
DA
MNT
_
V
O
U
T
AV
2
_
V
IN
AV
2
_
L
IN/
R
IN
IIS
_
OUT
US
B
US
B
_
D
P
/
D
N
AU
D
IO
AM
P
DDC_
S
C
L
3
/
S
DA
3
HD
M
I_
D
A
T
A
_
3
TM
D
S
TM
D
S
TM
D
S
EE
PR
O
M
24C
0
2
FR
C
I
C
LG
E
7
3
2
9
A
UR
S
A
_
[
C
~
D
]
UR
S
A
_
[
A
:B
]
OP
C
_
E
N
DDR
2
S
D
R
A
M
(2
*
256M
B)
Se
ri
a
l F
la
s
h
PS
U
R
L
_
O
N/
I-
D
IMMI
NG
/
D
IS
P
_
E
N
PA
N
E
L
_
ST
A
T
U
S
E-
D
IM
B
lu
e
toot
h
Ci
rc
u
it
BL
T
_
D
P
/
D
N
DDR
2
S
D
R
A
M
(5
1
2
M
B
)
EEP
R
O
M
(2
56K
)
S
e
ri
a
l F
las
h
(8
M
B
y
te
)
EEP
R
O
M
fo
r
H
DCP
(8
K
)
EEP
_
S
C
L
/
S
D
A
EEP
_
S
C
L
/
S
D
A
ME
MC
_
R
X
E
2±
ME
MC
_
R
X
E
4±
ME
MC
_
R
X
C
3±
ME
MC
_
R
X
C
±
ME
MC
_
R
X
E
1±
ME
MC
_
R
X
E
0±
ME
MC
_
R
X
O
2±
ME
MC
_
R
X
O
4±
ME
MC
_
R
X
O
3±
ME
MC
_
R
X
O
C±
ME
MC
_
R
X
O
1±
ME
MC
_
R
X
O
0±
EE
PR
O
M
24C
0
2
M_
S
C
L/
S
D
A
FULL HD L
VDS connector
FRC LVDS connector
* OPC_OUT
is directly connected
between
T
-con and Module Inverter
by using FFC.
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