LG 37LK450 (CHASSIS:LA01U) 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.
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.
HDMI_CEC
D2+_HDMI1
DDC_SDA_4
IC802
AT24C02BN-SH-T
HDMI_2_ATMEL
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
D1+_HDMI2
C806
0.1uF
DDC_SDA_1
D804
D801
OPT
DDC_SDA_4
Q802
2SC3052
E
B
C
R853
68K
D1+_HDMI4
DDC_SCL_4
5V_DET_HDMI_1
GND
C807
0.1uF
EDID_WP
D825
D824
ENKMC2838-T112
A
1
C
A
2
+5V_Normal
DDC_SCL_2
CK-_HDMI2
5V_DET_HDMI_4
D1-_HDMI1
+5V_Normal
5V_HDMI_4
R862
10K
R830
10K
CEC_REMOTE_S7
D822
ENKMC2838-T112
A
1
C
A
2
R895
1K
5V_HDMI_2
DDC_SCL_1
HPD2
+3.5V_ST
Q803
2SC3052
E
B
C
R828
10K
R874
10K
D826
AVRL161A1R1NT
OPT
D0-_HDMI1
JP805
+5V_Normal
C803
0.1uF
16V
0.1uF
16V
D1+_HDMI1
CK+_HDMI1
R801
3.3K
CK+_HDMI2
R803
1.8K
D2-_HDMI4
EDID_WP
D2-_HDMI1
D811
OPT
R855
0
OPT
D1-_HDMI4
5V_HDMI_4
+3.3V_Normal
CEC_ON/OFF
DDC_SDA_2
IC801
AT24C02BN-SH-T
HDMI_1_ATMEL
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
R856
10K
10K
R882
22
C802
0.1uF
16V
0.1uF
16V
R837
1.8K
JK802
EAG59023302
HDMI_1
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
R881
22
D802
OPT
GND
DDC_SCL_2
BSS83
Q805
S
B
D
G
CEC_REMOTE_NEC
DDC_SCL_4
GND
HDMI_CEC
CK+_HDMI4
JP806
R854
68K
R875
22
R835
3.3K
HPD1
HPD4
D0+_HDMI1
R878
22
HDMI_CEC
D0+_HDMI2
R804
1.8K
R897
1K
C810
0.1uF
16V
0.1uF
16V
C801
0.1uF
16V
0.1uF
16V
D0+_HDMI4
D803
AVRL161A1R1NT
OPT
5V_HDMI_1
BSS83
Q806
S
B
D
G
R876
22
C805
0.1uF
16V
0.1uF
16V
DDC_SDA_1
R893
10K
10K
IC804
AT24C02BN-SH-T
HDMI_SIDE_ATMEL
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
JK801
EAG59023302
HDMI_2
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
D1-_HDMI2
GND
CK-_HDMI1
EDID_WP
R877
22
D2+_HDMI2
D821
ENKMC2838-T112
A
1
C
A
2
D0-_HDMI4
R896
1K
D2+_HDMI4
R802
3.3K
DDC_SCL_1
R883
0
OPT
R873
10K
R871
10K
C809
0.1uF
D2-_HDMI2
R857
68K
OPT
5V_DET_HDMI_2
5V_HDMI_1
DDC_SDA_2
D0-_HDMI2
R892
68K
CK-_HDMI4
Q801
2SC3052
E
B
C
5V_HDMI_2
JK803
EAG62611201
HDMI_SIDE
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
R824
0
R841
0
R815
0
JP812
JP810
IC801-*1
R1EX24002ASAS0A
HDMI_1_RENESAS
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
IC802-*1
R1EX24002ASAS0A
HDMI_2_RENESAS
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
IC804-*1
R1EX24002ASAS0A
HDMI_SIDE_RENESAS
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
R885
2.7K
R889
2.7K
R888
2.7K
R884
2.7K
R887
2.7K
R891
2.7K
For CEC
HDMI EEPROM
HDMI_1
$0.055
SIDE_HDMI
$0.055
$0.055
HDMI_2
20101023
GP2R
HDMI
8
Fiber Optic
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.
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.
Q1104
MMBT3904-(F)
E
B
C
C1115
1000pF
50V
1000pF
50V
OPT
C1121
100pF
50V
100pF
50V
DSUB_G+
D1113
30V
DSUB_R+
D1111
30V
30V
C1118
10uF
16V
10uF
16V
D1114
5.6V
OPT
OPT
R1103
470K
470K
Q1103
MMBT3904-(F)
E
B
C
R1130
10K
PC_L_IN
002:S12
C1122
68pF
50V
68pF
50V
OPT
C1107
100pF
50V
DSUB_DET
HP_ROUT
002:V7
D1112
30V
30V
R1142
10K
C1108
100pF
50V
50V
RGB_DDC_SCL
DSUB_VSYNC
RGB_DDC_SDA
C1128
18pF
18pF
50V
R1143
22
22
Q1106
2SC3052
E
B
C
Q1105
ISA1530AC1
E
B
C
R1133
75
75
C1131
0.1uF
16V
16V
D1115
ENKMC2838-T112
A1
C
A2
R1110
10K
R1111
10K
R1125
1K
1K
Q1102
MMBT3904-(F)
E
B
C
D1116
5.6V
OPT
R1146
10K
10K
+3.5V_ST
R1102
470K
470K
+3.3V_Normal
+5V_Normal
HP_DET
R1128
1K
JK1104
SPG09-DB-010
1
RED
2
GREEN
3
BLUE
4
GND_1
5
DDC_GND
6
RED_GND
7
GREEN_GND
8
BLUE_GND
9
NC
10
SYNC_GND
11
GND_2
12
DDC_DATA
13
H_SYNC
14
V_SYNC
15
DDC_CLOCK
16
SHILED
R1107
15K
15K
JK1103
JST1223-001
1
GND
2
VCC
3
VINPUT
4
FIX_POLE
+3.3V_Normal
R1135
75
75
R1155
1K
1K
HP_LOUT
002:V7
C1126
68pF
50V
68pF
50V
OPT
C1119
10uF
16V
10uF
16V
SPDIF_OUT
002:T18
D1109
30V
C1129
0.1uF
16V
PC_R_IN
002:S12
R1129
3.3K
R1137
75
+3.3V_Normal
D1101
5.6V
OPT
OPT
AMOTECH
EDID_WP
R1147
1K
1K
SIDE_HP_MUTE
IC1105
AT24C02BN-SH-T
RGB_EEMPROM_ATMEL
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
Q1101
MMBT3904-(F)
E
B
C
D1110
30V
30V
JK3301
KJA-PH-0-0177
3
DETECT
4
L
5
GND
1
R
C1127
18pF
50V
DSUB_HSYNC
DSUB_B+
JK1102
PEJ027-01
6B
T_TERMINAL2
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
C1116
1000pF
50V
1000pF
50V
OPT
D1102
5.6V
OPT
OPT
AMOTECH
D1117
5.6V
OPT
R1108
15K
15K
R1141
22
22
IC1105-*1
R1EX24002ASAS0A
RGB_EEMPROM_RENESAS
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
R1139
2.2K
R1140
2.2K
2.2K
5.15 Mstar Circuit Application
SPDIF OPTIC JACK
RGB/SPDIF/PC/HP
PC AUDIO
RGB PC
EARPHONE BLOCK
New Item Development
20101023
GP2R
RGB/SPDIF/HP
9
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.
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.
R1124
100
100
JK1101
SPG09-DB-009
1
2
3
4
5
6
7
8
9
10
JP1121
IC1101
MAX3232CDR
EAN41348201
3
C1-
2
V+
4
C2+
1
C1+
6
V-
5
C2-
7
DOUT2
8
RIN2
9
ROUT2
10
DIN2
11
DIN1
12
ROUT1
13
RIN1
14
DOUT1
15
GND
16
VCC
S7_NEC_TXD
D1108
30V
CDS3C30GTH
OPT
C1102
0.1uF
JP1122
C1106
0.1uF
0.1uF
S7_NEC_RXD
C1103
0.1uF
C1101
0.33uF
C1104
0.1uF
+3.5V_ST
D1107
30V
CDS3C30GTH
OPT
R1123
100
100
C1105
0.1uF
RS232C
20101023
GP2R
RS232C_9PIN
10
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.
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.
RXA0+
RXB3-
R705
3.3K
OPT
RXA0-
RXB0-
PANEL_VCC
RXC2-
PANEL_VCC
RXA2+
RXACK-
RXA3-
RXB0+
RXA1-
RXD4+
RXC3-
RXD0+
RXB4+
RXB4-
RXACK+
RXB1+
RXB2+
RXD4-
RXC0-
RXDCK-
RXC2+
RXDCK+
RXACK-
RXA2-
RXD0-
L701
120-ohm
HD
RXD3+
RXA3+
L702
120-ohm
WAFER_FHD
C702
1000pF
50V
1000pF
50V
OPT
RXC4+
RXA3-
RXD2+
TP721
RXC3+
RXC4-
RXA4+
RXA1-
RXA1+
RXA2+
C701
10uF
16V
10uF
16V
OPT
RXA1+
SCAN_BLK2
RXACK+
R712
3.3K
OPT
RXCCK-
OPC_OUT
RXD3-
RXA4-
R711
10K
OPT
RXA0+
R709
10K
10K
BIT_SEL_LOW
+3.3V_Normal
RXA3+
RXB3+
+3.3V_Normal
RXBCK+
RXB1-
C703
0.1uF
16V
0.1uF
16V
HD
RXCCK+
C709
1000pF
50V
1000pF
50V
OPT
TP722
RXC1+
RXC0+
PWM_DIM
C700
10uF
16V
10uF
16V
OPT
RXD1-
RXA0-
RXC1-
R710
10K
OPT
PWM_DIM
RXBCK-
C710
0.1uF
16V
0.1uF
16V
WAFER_FHD
SCAN_BLK1/OPC_OUT
RXA2-
RXB2-
RXD2-
P705
FF10001-30
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
RXD1+
P703
FI-RE51S-HF-J-R1500
WAFER_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
P704
FI-RE41S-HF-J-R1500
WAFER_FHD_120HZ
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
2D/3D_CTL
R707
0
LVDS_51PIN_GND
R706
100
100
LVDS_51PIN_GPIO
R713
0
OPT
LVDS_SEL
[51Pin LVDS Connector]
(For FHD 60/120Hz)
(For FHD 60/120Hz)
LVDS_SEL
[41Pin LVDS Connector]
(For FHD 120Hz)
(For FHD 120Hz)
[30Pin LVDS Connector]
(For HD 60Hz_Normal)
(For HD 60Hz_Normal)
BIT_SEL
20101023
GP2R
LVDS_LARGE
11
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