LG 42LN549C / 42LN549E (CHASSIS:LJ3AC) Service Manual ▷ View 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.
5V_HDMI_2
DDC_SDA_2
DDC_SCL_1
DDC_SDA_4
D0+_HDMI2
DDC_SDA_1
+5V_Normal
5V_DET_HDMI_2
D0-_HDMI2
5V_DET_HDMI_4
2.7K
R813
5V_HDMI_1
10K
R808
D1-_HDMI4
CEC_REMOTE_S7
5V_HDMI_4
D1-_HDMI2
1.8K
R802
10K
R811
D2+_HDMI2
100
R816
CK+_HDMI2
2.7K
R820
H
D
M
I_
2
10K
R809
HDMI_2
D2-_HDMI4
CK-_HDMI2
0.1uF
16V
C802
NON_CI_CAP
DDC_SDA_4
HDMI_CEC
1K
R803
HDMI_2
D2-_HDMI2
D2-_HDMI1
HPD2
0.1uF
16V
C801
NON_CI_CAP_HDMI_2
5V_HDMI_2
CK-_HDMI1
DDC_SDA_1
+5V_Normal
HDMI_CEC
1K
R801
DDC_SCL_4
D1-_HDMI1
CK+_HDMI4
10K
R821
HDMI_SIDE
10K
HDMI_SIDE
R823
1.8K
HDMI_SIDE
R815
DDC_SCL_2
20
33
20
95
G
A
E
JK801
la
mr
o
N_
2_
I
M
D
H
14
13
5
D1_GND
20
SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
D0-_HDMI4
HPD4
D2+_HDMI1
D1+_HDMI2
1.8K
R804
HDMI_2
3
.3
K
R
80
5
+5V_Normal
DDC_SDA_2
HDMI_CEC
HPD1
20
33
20
95
G
A
E
JK802
la
mr
o
N_
1_
I
M
D
H
14
13
5
D1_GND
20
SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
HDMI_CEC
D0-_HDMI1
5V_DET_HDMI_1
D0+_HDMI1
D0+_HDMI4
CK-_HDMI4
2.7K
R812
DDC_SCL_1
5V_HDMI_4
DDC_SCL_2
10K
R810
HDMI_2
2.7K
R819
H
D
M
I_
2
3
.3
K
H
D
M
I_
SI
D
E
R
81
7
D1+_HDMI1
DDC_SCL_4
0.1uF
16V
NON_CI_CAP_HDMI_SIDE
C803
5V_HDMI_1
D1+_HDMI4
CK+_HDMI1
1K
HDMI_SIDE
R814
D2+_HDMI4
3
.3
K
R
80
6
H
D
M
I_
2
2.7K
R827
H
D
M
I_
SI
D
E
2.7K
R828
H
D
M
I_
SI
D
E
MMBT3904(NXP)
Q801
E
B
C
MMBT3904(NXP)
Q802
HDMI_2
E
B
C
MMBT3904(NXP)
HDMI_SIDE
Q804
E
B
C
MMBD6100
D801
2
A
C
1
A
MMBD6100
D802
H
D
M
I_
2
2
A
C
1
A
MMBD6100
D803
H
D
M
I_
SI
D
E
2
A
C
1
A
OPT
VA803
VA803
VA802
OPT
VA801
OPT
51U019S-312HFN-E-R-E-LG
JK803-*1
SIDE_HDMI_32LS3500
14
RESERVED
13
CEC
5
TMDS_DATA1_SHIELD
20
BODY_SHIELD
12
TMDS_CLK-
11
TMDS_CLK_SHIELD
2
TMDS_DATA2_SHIELD
19
HOT_PLUG_DETECT
18
VDD[+5V]
10
TMDS_CLK+
4
TMDS_DATA1+
1
TMDS_DATA2+
17
DDC/CEC_GND
9
TMDS_DATA0-
8
TMDS_DATA0_SHIELD
3
TMDS_DATA2-
16
SDA
7
TMDS_DATA0+
6
TMDS_DATA1-
15
SCL
0
HDMI1_ARC
R807
HDMI_ARC
YKF45-7054V
HDMI_2_BDP_Model
JK801-*1
14
NC
13
CEC
5
DATA1_SHIELD
20
SHIELD
12
CLK-
11
CLK_SHIELD
2
DATA2_SHIELD
19
HPD
18
+5V_POWER
10
CLK+
4
DATA1+
1
DATA2+
17
DDC/CEC_GND
9
DATA0-
8
DATA0_SHIELD
3
DATA2-
16
SDA
7
DATA0+
6
DATA1-
15
SCL
YKF45-7054V
HDMI_1_BDP_Model
JK802-*1
14
NC
13
CEC
5
DATA1_SHIELD
20
SHIELD
12
CLK-
11
CLK_SHIELD
2
DATA2_SHIELD
19
HPD
18
+5V_POWER
10
CLK+
4
DATA1+
1
DATA2+
17
DDC/CEC_GND
9
DATA0-
8
DATA0_SHIELD
3
DATA2-
16
SDA
7
DATA0+
6
DATA1-
15
SCL
E
A
G
62
61
12
04
H
D
M
I_
SI
D
E
JK803
14
13
5
D1_GND
20
BODY_SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
HDMI/RJP
8
HDMI_2
For CEC
SIDE_HDMI
HDMI
HDMI_1
For BDP In-Packing Model
- EMI Gasket Touch Jack
LA2AW
2 0 1 2 . 0 9 . 1 1
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
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.
5pF
50V
ASIA
C1017
0
R1003
NON_BR
100pF
50V
C1009
4.7K
TU_BUFFER
R1027
0.1uF 16V
NON_ASIA
C1004
FE_TS_DATA[0-7]
TDSN_B001F
SI2176_BR_2INPUT_H
TU1001
1
RF_S/W_CTL
2
RESET
3
SCL
4
SDA
5
+B1[3.3V]
6
SIF
7
+B2[1.8V]
8
CVBS
9
NC_1
10
NC_2
11
NC_3
12
+B3[3.3V]
13
+B4[1.23V]
14
NC_4
15
GND
16
ERROR
17
SYNC
18
VALID
19
MCLK
20
D0
21
D1
22
D2
23
D3
24
D4
25
D5
26
D6
27
D7
28
SHIELD
A1
A1
B1
B1
0
R1002
NON_BR
10K
FULL_NIM_BCD
R1013
FU
L
L
_N
IM
L
1
0
0
2
20pF
50V
OPT
C1023
+5V_Normal
10K
FULL_NIM_OPT
R1005
100pF
50V
C1003
MLB-201209-0120P-N2
L1003
0
NON_ASIA R1024
1K
R1022
1K
R1019
1/16W
1
5%
R1009
0
NON_ASIA R1023
AZ1117BH-1.8TRE1
IC1001
1
ADJ/GND
2 OUT
3
IN
82
R1032
0.1uF
16V
FULL_NIM
C1018
0.1uF
16V
FULL_NIM
C1002
470
TU_BUFFER
R1030
100
R1008
IF_N_MSTAR
1005
20K
FULL_NIM_BCD
R1011
220
TU_BUFFER
R1029
0
ASIA
R1017
100K
R1010
0.1uF
16V
C1001
MMBT3906(NXP)
TU_BUFFER
Q1002
E
B
C
10uF
10V
C1015
+3.3V_TU
TU_SCL
+1.2V/+1.8V_TU
0.1uF
16V
C1011
0.1uF
16V
C1012
NON_BR
FE_TS_VAL_ERR
33 R1014
22uF
10V
C1024
3 . 3
ASIA
R1020
10
K
FU
L
L
_N
IM
R
10
04
10uF
6.3V
C1008
TU_SIF
0.1uF
16V
C1025
220
TU_BUFFER
R1031
+3.3V_TU
18pF
50V
C1019
TDSS-H101F
H
_
T
U
P
NI
1
_
C
S
T
A
_
6
7
1
2I
S
TU1002-*1
5
+B1[3.3V]
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
NC
9
IF_AGC
8
CVBS
3
SCL
7
+B2[1.8V]
6
SIF
12
SHIELD
A1
A1
B1
B1
0
TU_NON_BUFFER
R1026
1K
OPT
R1028
0
TU_NON_BUFFER
R1025
10uF
10V
FULL_NIM
C1021
+3.3V_TU
+3.3V_TU
0
ASIA
R1021
RF_SWITCH_CTL
+1.2V/+1.8V_TU
5pF
50V
ASIA
C1020
+3.3V_TU
0.1uF
16V
C1007
3 . 3
ASIA
R1016
FE_TS_CLK
MMBT3906(NXP)
TU_BUFFER
Q1001
E
B
C
0
RF_SW_OPT
R1001
0.1uF
16V
C1010
+1.23V_TU
120
FULL_NIM
L1001
100
R1007
NON_BR
11K
FULL_NIM_BCD
R1012
18pF
50V
C1016
+3.3V_Normal
TH
ER
M
A
L
AP2132MP-2.5TRG1
FULL_NIM_BCD
IC1002
3
VIN
2
EN
4
VCTRL
1
PG
5
NC
6
VOUT
7
ADJ
8
GND
9
[EP]
IF_P_MSTAR
0.1uF
16V
C1005
+3.3V_TU
TUNER_RESET
0.1uF
16V
C1013
22uF
10V
C1026
0
FULL_NIM_BCD
R1006
2K
OPT
R1018
0.1uF
16V
C1027
FE_TS_SYNC
+1.23V_TU
TDSS-G102D
SI2176_DVB_1INPUT_H
TU1002
5
+B1[3.3V]
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
NC
9
IF_AGC
8
CVBVS
3
SCL
7
+B2[1.8V]
6
SIF
12
SHIELD
A1
A1
B1
B1
22uF
25V
C1006
0
ASIA
C1004-*1
+3.3V_TU
TU_CVBS
TU_SDA
33
R1015
20pF
50V
OPT
C1022
0.1uF
16V
C1014
IF_AGC_MAIN
FE_TS_DATA[4]
FE_TS_DATA[6]
FE_TS_DATA[5]
FE_TS_DATA[3]
FE_TS_DATA[7]
FE_TS_DATA[0]
FE_TS_DATA[2]
FE_TS_DATA[1]
GP4R_GLOBAL_TUNER_BLOCK
TUNER
10
LA2AW
2 0 1 2 . 0 9 . 1 1
C l o s e t o t h e t u n e r
BCD Vo=0.6*(1+R1/R2)
c l o s e t o t h e t u n e r p i n , a d d , 0 9 0 2 9
close to TUNER
TJ Vo=0.8*(1+R1/R2)
s h o u l d b e g u a r d e d b y g r o u n d
R1
380mA
1 . s h o u l d b e g u a r d e d b y g r o u n d
2 . N o v i a o n b o t h o f t h e m
3 . S i g n a l W i d t h > = 1 2 m i l s
S i g n a l t o S i g n a l W i d t h = 1 2 m i l s
G r o u n d W i d t h > = 2 4 m i l s
add,0929
S i z e c h a n g e , 0 9 2 9
R2
C l o s e t o t h e C I S l o t
60mA
P u l l - u p c a n ’ t b e a p p l i e d
because of MODEL_OPT_2
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.
RXA4+
10uF
16V
OPT
C1103
RXB1-
RXA3-
RXA0+
RXB3-
PANEL_VCC
RXA2+
1000pF
50V
C1101
OPT
10K
OPT
R1108
RXA0-
10K
AUO_GND
R1101
RXA0+
RXB4-
RXA1+
RXA0-
RXACK-
0
HD_GND_2pin
R1106
RXA2-
RXACK+
1000pF
50V
OPT
C1104
10uF
16V
OPT
C1100
RXA1-
FI-RE51S-HF-J-R1500
P1100
FHD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
3.3K
OPT
R1107
+3.3V_Normal
0.1uF
16V
HD
C1105
RXA1+
RXB1+
RXB0-
RXACK-
RXA2+
FF10001-30
P1101
HD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
RXA2-
PANEL_VCC
RXA4-
RXACK+
RXB0+
RXA1-
RXA3-
0.1uF
16V
C1102
FHD
RXA3+
RXB4+
RXBCK-
RXB3+
RXA3+
RXB2+
RXB2-
RXBCK+
3.3K
OPT
R1102
10K
OPT
R1103
+3.3V_Normal
0
PSU_T120_LGD
R1100
PWM_DIM
OPC&SCANNING_CTRL
3.3K
OPT
R1104
+3.3V_Normal
10K
OPT
R1105
70-ohm
FHD
L1100
BLM18SG700TN1D
70-ohm
HD
L1101
AUO_GND/LGD_NC
LVDS_SEL
[30Pin LVDS Connector]
(For HD 60Hz_Normal)
LVDS for large inch
[51Pin LVDS Connector]
(For FHD 60Hz)
RXB3-
RXA4-
RXA0+
RXB4-
RXB1+
RXB1+
RXA4+
RXB3-
RXA4+
RXA2-
RXB3+
RXB2+
MIRROR
FOR FHD REVERSE(8bit)
RXA0+
RXA3-
RXB0-
RXA2+
RXACK-
RXA1+
RXA4-
RXB1+
RXB3-
RXA2+
RXB2-
RXB4+
RXB3-
RXB0+
MIRROR
RXB3+
RXB2-
RXBCK+
RXACK-
RXB3+
RXB1+
RXA1+
RXA0-
RXB2-
RXB4+
RXA2+
RXA2+
RXA4+
RXB1-
RXB0-
RXA3+
RXA0-
RXB4-
RXBCK-
RXB1-
RXA1-
RXA4-
RXA3-
RXA1+
RXA0-
RXA4-
RXB2+
RXA2-
RXB4-
RXA3-
RXACK+
RXA4+
RXB1-
RXB3+
RXA4-
RXB1-
Pol-change
S h i f t
RXB2-
RXA2+
RXB4+
RXACK-
RXA1-
RXB4+
RXB0+
RXB3-
RXA1-
RXA0+
RXA3-
RXBCK+
RXA0-
RXB0-
RXB1+
RXA0+
RXBCK+
RXA0-
RXBCK+
RXACK-
RXA2-
RXA4+
RXACK+
RXA2-
RXB0-
RXB1-
RXB3+
RXBCK+
RXB3-
RXB0-
RXB2+
RXB0-
RXB2-
RXA3+
RXACK-
RXB0+
RXB2+
RXA3+
RXB0+
RXA1-
RXA4-
RXB4+
RXA2-
RXA2+
RXA0+
RXB1-
RXB2-
RXA3+
RXBCK+
RXB4-
RXB2+
RXA3+
RXB4-
RXB2+
RXBCK-
RXA1-
RXA0+
Change in S7LR
RXBCK-
RXA4+
Pol-change
RXA0-
RXB3-
RXB4-
RXACK+
RXB0+
RXB4+
RXBCK-
RXACK+
RXB0+
RXA3-
RXA3+
Change in S7LR
RXBCK-
RXA3-
RXBCK-
RXACK+
RXA4-
RXB0-
RXACK-
RXA1+
RXACK-
RXB1+
RXA1-
RXA3+
RXA2-
RXB4-
RXA3-
RXA0-
RXB1-
RXBCK-
RXBCK+
RXA1+
RXB3+
RXB3+
RXA1-
RXB2-
RXB1+
RXA2-
RXB4+
RXACK+
RXA0+
RXA1+
RXA4+
FOR FHD REVERSE(10bit)
RXB2+
RXB0+
RXA1+
RXACK+
RXA2+
LVDS_SEL
SCANNING_EN
LA2AW
2 0 1 2 . 0 9 . 1 1
LVDS_LARGE
11
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