Read LG 42LN549C / 42LN549E (CHASSIS:LJ3AC) Service Manual online
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.
4
7
u
F
25
V
C
92
3
E
X
T
_S
PK
4.7K
R935
EXT_SPK
EXT_OUT_L
0.1uF
50V
C914
EXT_SPK
EXT_AMP_L
10K
R931
EXT_SPK
1uF
50V
C911
EXT_SPK
4.7uF
50V
C916
EXT_SPK
TPA3124D2PWPR
IC901
EXT_SPK
3
PVCCL_2
2
SD
4
MUTE
1
PVCCL_1
6
RIN
5
LIN
7
BYPASS
8
AGND_1
9
AGND_2
10
PVCCR_1
11
VCLAMP
12
PVCCR_2
13
PGNDR_1
14
PGNDR_2
15
ROUT
16
BSR
17
GAIN1
18
GAIN0
19
AVCC_1
20
AVCC_2
21
BSL
22
LOUT
23
PGNDL_1
24
PGNDL_2
EXT_OUT_R
4.7K
R923
EXT_SPK
SUB_AMP_MUTE
001:AC13
1uF
50V
C912
EXT_SPK
10K
OPT
R930
22.0uH
L905
EXT_SPK
10K
OPT
R932
0.1uF
50V
C913
EXT_SPK
10K
R933
EXT_SPK
BLM18PG121SN1D
L903
EXT_SPK
0.1uF
50V
C915
EXT_SPK
100
R922
EXT_SPK
22.0uH
L904
EXT_SPK
MMBT3904(NXP)
Q903
EXT_SPK
E
B
C
+24V
EXT_AMP_R
4.7K
R934
EXT_SPK
10K
R928
EXT_SPK
100
R924
EXT_SPK
B
L
M
18
PG
12
1S
N
1D
L
9
0
2
E
X
T
_S
PK
4
7
u
F
25
V
C
92
4
E
X
T
_S
PK
0.22uF
50V
C918
EXT_SPK
+3.5V_ST
0.22uF
50V
C917
EXT_SPK
100
R940
OPT
100
OPT
R925
10K
R936
EXT_SPK
10K
R937
EXT_SPK
100K
R939
EXT_SPK
EXT_SPK_DET
1uF
OPT
C925
EXT_OUT_R
1uF
OPT
C926
100
R938
EXT_SPK
+3.3V_Normal
EXT_OUT_L
10K
RJP
R914
0
.0
1
u
F
R
JP
C
90
7
0
.0
1
u
F
R
JP
C
90
2
1uF
25V
OPT
C903
+12V
5
.1
V
R
JP
Z
D
90
3
22uF
16V
OPT
C908
0
RJP_PROTECTION
R906
5
.1
V
R
JP
Z
D
90
4
RJP_CTRL4
510 RJP
R912
0
.0
1
u
F
R
JP
C
90
5
5.1K
RJP_PROTECTION
R903
3
.9
K
R
JP
R
91
6
0
.0
1
u
F
R
JP
C
90
6
RJP_CTRL1
2.2uF
16V RJP
C901
3
.9
K
R
JP
R
91
7
10K
RJP
R902
3
.9
K
R
JP
R
91
5
5
.1
V
R
JP
Z
D
90
2
5.1K
RJP_PROTECTION
R904
510 RJP
R913
100K
RJP_PROTECTION
R908
RJP_CTRL2
5
.1
V
R
JP
Z
D
90
1
8
.2
K
R
JP
R
91
9
1K
RJP_PROTECTION
R905
510 RJP
R909
0
RJP_NORMAL
R907
5
.1
V
R
JP
Z
D
90
5
KRJV9768-1001-024
RJP
JK901
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
RJP_CTRL3
AO3407ARJP_PROTECTION
Q901
G
D
S
BLM18PG121SN1D
RJP
L901
10K
RJP
R901
0
.0
1
u
F
R
JP
C
90
4
510 RJP
R911
AO3407A RJP
Q902
G
D
S
RJP_CTRL0
3
.9
K
R
JP
R
91
8
510 RJP
R910
PEJ034-01
JK902
EXT_SPK
6B T_TERMINAL2
7B B_TERMINAL2
5 T_SPRING
4 R_SPRING
3 E_SPRING
2.2uF
50V
C919
EXT_SPK
2.2uF
50V
C921
EXT_SPK
2.2uF
50V
C920
EXT_SPK
2.2uF
50V
C922
EXT_SPK
10K
EXT_SPK
R941
1uF
10V
C927
EXT_SPK
1uF
10V
C928
EXT_SPK
RJP / EXT AMP
9
LA2AW
2 0 1 2 . 0 9 . 1 1
Single ended
EXT_SPEAKER
RJP
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