LG 60LN54XX / 60LN5400 / 60LN5420 / 60LN542Y (CHASSIS:LB31F / LB36B) Service Manual ▷ View online
- 17 -
6. MHL Video
Check input signal format.
Is it supported?
Check MHL Cable conductors
for damage or open conductor.
Check MHL Signal (R214, R215)
Check JK803
ok
ok
ok
No
No
Replace the defective IC or re-download EDID data
ok
Replace Jack
Check MHL Signal
Check other set
If no problem, check signal line
ok
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
No
Replace Main Board
No
Check CD_Sense, Cbus, Vbus
No
Replace R810, R802, R831, R830, IC802, D800
Check URSA5 LVDS Output
Replace URSA5(IC6101) or Main Board.
ok
No
- 18 -
7. All Source Audio
Check the TV Speaker Menu
(Menu -> Audio -> TV Speaker)
On
ok
ok
Check Output Signal P3401
1, 2, 3, 4 pin.
Replace Audio AMP IC(IC3401)
ok
No
Check Connector & P3401
Replace connector
if found to be damaged.
ok
No
Check speaker resistance
and connector damage.
Replace speaker.
ok
No
Off
Toggle the Menu
Check AMP IC(IC3401) Power
24V, 3.3V
No
Replace Amp IC(IC501)
Check Mstar I2S Output
IC3401 37,38,39 Pin
No
Check signal line. Or replace Mstar(IC101)
Check Mstar AUDIO_MASTER_CLK
R148
No
Replace Mstar(IC101) or Main Board.
ok
Check AMP I2C Line
R3406, R3407
No
Check signal line. Or replace Mstar(IC101)
- 19 -
8. Digital/Analog TV Audio
9. AV Audio
10. Component Audio
Check RF Cable & Signal
Follow procedure ‘7. All source audio’
trouble shooting guide.
ok
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.8V Power
IC3703 2 pin : 1.8V
Check IF_P/N Signal
TU3700 10/11 Pin
Replace IC3703
ok
ok
ok
No
No
No
Bad Tuner. Replace Tuner.
Check AV Cable for damage
for damage or open conductor
Check JK1702 Signal Line
R1714,R1715
ok
ok
No
Replace Jack
Follow procedure
‘7. All source audio’
trouble shooting guide.
Check Component Cable
for damage or open conductor.
Check JK1702 Signal Line
R1714,R1715
ok
ok
No
Replace Jack
Follow procedure
‘7. All source audio’
trouble shooting guide.
- 20 -
(P
64
02
)
41P
LV
DS
waf
er
51P
LV
DS
waf
er
(P
64
01
)
SI
D
E
U
SB
(J
K
700)
H
D
M
I2
(M
H
L)
(J
K
803)
C
K
+/
-,
D
0+
/-,
D
1+
/-,
D
2+
/-,
_H
D
M
I4
SI
D
E_U
SB
_D
M
/D
P
U
SB
1_O
C
D
/C
TL
O
C
P
IC
:
TP
S6
52
81
(IC
40
1)
+5
V_
U
SB
C
O
M
P1_
L/
R
_I
N
C
O
M
P1_Y
+/
AV
_C
VB
S_
IN
, C
O
M
P1_Pb
+/
Pr
+
SPD
IF
_O
U
T
C
K
+/
-,
D
0+
/-,
D
1+
/-,
D
2+
/-_
H
D
M
I2
D
D
C
_SC
L/
SD
A_2,
H
D
M
I_C
EC
Se
ria
l F
la
sh
(1
6M
bi
t)
IC
13
00
SP
I_
SC
K
/SD
I/S
D
O
/C
S
Sy
st
em
E
EP
R
O
M
(2
56
K
bi
t)
IC
10
4
I2
C
_SC
L/
SD
A
N
A
N
D
F
LA
SH
(1
G
bi
t)
IC
10
2
PC
M
_A
[0-7]
,…
D
D
R
3
SD
R
A
M
(2
G
bi
t)
IC
12
01
A-
M
D
Q
L[
0-
7]
, A
-M
D
QU
[0-7],
…
TX
A0
+/
-~
TX
A4
+/
-,
TX
AC
K
+/
-
TX
B
0+
/-~
TX
B
4+
/-,
T
XB
C
K
+/
-
M
ai
n
SO
C
M
1(
M
S
D
80
4K
K
X
)
(IC
10
1)
C
on
ne
ct
or
(P
60
0)
K
EY1
/2
, L
ED
_R
, I
R
,
SD
A,
SC
L
R
EA
R
H
D
M
I1
(J
K
802)
SPD
IF
(O
pt
ic
)
(J
K
1103
)
TU
_SC
L
/ SD
A
SI
F
(R
ead
y)
C
omp
1
&
A
V1
(J
K
1602
)
D
D
C
_SC
L/
SD
A_4,
H
D
M
I_C
EC
, M
H
L_
C
D
_SE
N
SE
IF
R
F
TD
SH
-G
50
1D
H
al
f N
IM
TX
C
0+
/-~
TX
C
4+
/-,
T
XC
C
K
+/
-
TX
D
0+
/-~
TX
D
4+
/-,
T
XD
C
K
+/
-
U
R
SA
5
LG
E
73
03
C
(IC
61
01
)
D
D
R
3
SD
R
A
M
(1
G
bi
t)
IC
62
01
A-
M
D
QL
[0
-7
],
A-
M
D
Q
U
[0
-7
],…
Se
ria
l F
la
sh
(2
M
bi
t)
IC
61
02
SP
I_
SC
K
/SD
I/SD
O/
C
S
R
XA
0+
/-~
R
XA
4+
/-,
R
XA
C
K
+/
-
R
XB
0+
/-~
R
XB
4+
/-,
R
XB
C
K
+/
-
U
R
S
A
B
lo
ck
SP
K
_R
SP
K
_L
AM
P_SC
L/
SD
A
AU
D
_M
AST
ER
_C
LK
,
AU
D
_L
R
C
H
,
AU
D
_L
R
C
K
, A
U
D
_SC
K
ST
A
38
0B
W
(IC
34
01
)
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