LG 32LK457C (CHASSIS:LB0EC) 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.
2.7K
R888
DDC_SCL_2
5V_DET_HDMI_4
0 . 1 u F
C807
D804
OPT
DDC_SDA_1
10K
R862
D1+_HDMI2
HDMI_CEC
10K
R871
HDMI_SIDE_EEPROM
D0-_HDMI1
GND
EAG59023302
JK801
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
J P 8 0 5
2SC3052
Q801
E
B
C
22
R878
CK-_HDMI4
22
R875
22
R881
68K
R854
OPT
D0+_HDMI2
0
R815
R1EX24002ASAS0A
IC804-*1
HDMI_SIDE_RENESAS
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
5V_HDMI_1
2.7K
R889
+5V_Normal
D2-_HDMI2
HPD4
10K
R828
CK+_HDMI1
D0+_HDMI4
1K
R896
0
OPT
R805
2SC3052
Q803
E
B
C
2.7K
R884
1.8K
R803
HPD2
OPT
D811
D801
OPT
5V_DET_HDMI_2
D802
OPT
2.7K
R885
ENKMC2838-T112
D824
D824
A1
C
A2
HDMI_CEC
22
R876
1.8K
R837
DDC_SCL_4
HDMI_CEC
AT24C02BN-SH-T
IC804
HDMI_SIDE_ATMEL
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
ENKMC2838-T112
D821
D821
A1
C
A2
DDC_SDA_2
DDC_SCL_4
EAG62611201
HDMI_SIDE
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
D0+_HDMI1
10K
R808
DDC_SDA_1
J P 8 1 0
AT24C02BN-SH-T
IC802
HDMI_2_ATMEL
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
1.8K
R804
+5V_Normal
R1EX24002ASAS0A
IC801-*1
HDMI_1_RENESAS
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
22
R877
10K
R874
HDMI_1_EEPROM
D2+_HDMI4
CK-_HDMI2
0 . 1 u F
C806
EDID_WP
EDID_WP
10K
R806
D1-_HDMI2
DDC_SCL_1
ENKMC2838-T112
D822
D822
A1
C
A2
DDC_SDA_2
CK+_HDMI4
J P 8 0 6
AT24C02BN-SH-T
IC801
HDMI_1_ATMEL
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
EAG59023302
JK802
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
CK+_HDMI2
SI1012CR-T1-GE3
Q806
OPT
S
D
G
0 . 1 u F
16V
16V
C805
OPT
2.7K
R887
5V_DET_HDMI_1
R1EX24002ASAS0A
IC802-*1
HDMI_2_RENESAS
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
GND
10K
R830
D0-_HDMI2
DDC_SCL_1
22
R882
5V_HDMI_2
CK-_HDMI1
J P 8 1 2
+5V_Normal
0 . 1 u F
16V
16V
C802
D1-_HDMI1
DDC_SDA_4
AVRL161A1R1NT
OPT
D803
0
R841
1K
R897
68K
OPT
OPT
R857
10K
R807
1K
R895
2SC3052
Q802
E
B
C
D1+_HDMI4
3.3K
R835
DDC_SCL_2
10K
R873
HDMI_2_EEPROM
0 . 1 u F
16V
16V
C803
5V_HDMI_4
HDMI_ARC
D2-_HDMI4
HDMI_CEC
EDID_WP
0 . 1 u F
C809
D2+_HDMI2
5V_HDMI_2
D0-_HDMI4
+3.5V_ST
10K
R856
OPT
D1-_HDMI4
D2+_HDMI1
D2-_HDMI1
3.3K
R802
2.7K
R891
5V_HDMI_4
DDC_SDA_4
CEC_REMOTE_S7
3.3K
R801
HPD1
0 . 1 u F
16V
16V
C801
5V_HDMI_1
D1+_HDMI1
0
R824
100
R855
20110324
GP3_S7LR
HDMI
8
HDMI_1
$0.055
HDMI EEPROM
HDMI_2
$0.055
For CEC
SIDE_HDMI
$0.055
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.
DSUB_DET
5.6V
OPT
D1114
AMOTECH
5.6V
OPT
D1101
RGB_DDC_SDA
2.2K
R1140
30V
D1110
PC_R_IN
2 : T 1 1
30V
D1113
18pF
50V
C1128
EDID_WP
DSUB_HSYNC
2.2K
R1139
AT24C02BN-SH-T
IC1105
RGB_EEMPROM_ATMEL
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
10K
R1142
RGB_EEPORM
+3.3V_Normal
DSUB_B+
R1EX24002ASAS0A
IC1105-*1
RGB_EEMPROM_RENESAS
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
10K
R1110
10K
R1146
10K
R1111
75
R1133
30V
D1112
15K
R1107
15K
R1108
0 . 1 u F
16V
16V
C1131
1K
R1147
22
R1143
+5V_Normal
470K
R1102
75
R1137
RGB_DDC_SCL
68pF
50V
50V
OPT
C1126
18pF
50V
C1127
100pF
50V
C1107
75
R1135
AMOTECH
5.6V
OPT
D1102
22
R1141
5.6V
OPT
OPT
D1116
30V
D1109
SPG09-DB-010
JK1104
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
10uF
16V
16V
C1110
OPT
DSUB_G+
5.6V
D1117
OPT
ENKMC2838-T112
D1115
A1
C
A2
DSUB_R+
DSUB_VSYNC
+3.3V_Normal
10K
R1104
OPT
SPDIF_OUT
2:Q18
PC_L_IN
2 : T 1 2
100pF
50V
50V
C1108
68pF
50V
50V
OPT
C1122
30V
D1111
22uF
16V
16V
C1109
OPT
470K
R1103
100pF
50V
50V
C1121
0 . 1 u F
16V
C1129
Fiber Optic
2F01TC1-CLM97-4F
JK1103
3
VIN
2
VCC
1
GND
4
SHIELD
P E J 0 2 7 - 0 4
JK1102
6B
T_TERMINAL2
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
2SC3052
Q1106
HEAD_PHONE
E
B
C
+3.5V_ST
1000pF
50V
50V
C1116
OPT
10uF
16V
16V
C1118
HEAD_PHONE
1K
R1128
H/P_EXT_SPK
3.3K
R1129
HEAD_PHONE
MMBT3904-(F)
Q1102
HEAD_PHONE
E
B
C
1K
R1155
H/P_EXT_SPK
MMBT3904-(F)
Q1101
HEAD_PHONE
E
B
C
1K
R1125
H/P_EXT_SPK
MMBT3904-(F)
Q1103
HEAD_PHONE
E
B
C
ISA1530AC1
Q1105
HEAD_PHONE
E
B
C
HP_DET
HP_LOUT
2:V7
HP_ROUT
2:V7
EXT_OUT_L
AN23
SIDE_HP_MUTE
MMBT3904-(F)
Q1104
HEAD_PHONE
E
B
C
EXT_OUT_R
AN22
+3.3V_Normal
KJA-PH-0-0177
JK3301
H/P_EXT_SPK
3
DETECT
4
L
5
GND
1
R
10uF
16V
16V
C1119
HEAD_PHONE
10K
R1130
H/P_EXT_SPK
1000pF
50V
50V
C1115
OPT
22.0uH
L22
EXT_SPK
0 . 1 u F
50V
C22
EXT_SPK
0 . 4 7 u F
50V
50V
C31
EXT_SPK
0 . 2 2 u F
50V
50V
C24 EXT_SPK
EXT_AMP_MUTE
1uF
50V
50V
C28
EXT_SPK
1uF
50V
50V
C29
EXT_SPK
+24V
AMP_RESET
100uF
25V
C33
EXT_SPK
100uF
25V
C32
EXT_SPK
0 . 1 u F
50V
C23
EXT_SPK
100
R25
OPT
100
R26
EXT_SPK
EXT_OUT_R
4.7K
R31
EXT_SPK
BLM18PG121SN1D
L20
EXT_SPK
0 . 1 u F
50V
50V
C26
EXT_SPK
1uF
50V
50V
C20
EXT_SPK
10uF
35V
35V
C27
EXT_SPK
10K
OPT
R29
EXT_L_AMP_IN
10K
R28
EXT_SPK
4.7K
R32
EXT_SPK
2SC3052
EXT_SPK
Q20
E
B
C
0 . 4 7 u F
50V
50V
C30
EXT_SPK
1uF
50V
50V
C21
EXT_SPK
10K
EXT_SPK
R34
TPA3124D2PWPR
IC20
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
1K
EXT_SPK
R33
EXT_OUT_L
10K
OPT
R27
0 . 2 2 u F
50V
50V
C25
EXT_SPK
22.0uH
L23
EXT_SPK
EXT_R_AMP_IN
10K
R30
EXT_SPK
SIDE_HP_MUTE
0
R9
EXT_SPK
0
OPT
R8
20110324
GP3_S7LR
RGB/SPDIF/HP
9
5 . 1 5 M s t a r C i r c u i t A p p l i c a t i o n
SPDIF OPTIC JACK
PC AUDIO
RGB PC
RGB/SPDIF/PC/HP
New Item Development
EARPHONE BLOCK or EXTERNAL SPEAKER JACK4
EXT_SPEAKER_AMP
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.
JP1112
0 . 1 u F
C1106
PM_RXD
0 . 1 u F
C1103
0 . 3 3 u F
C1101
0 . 1 u F
C1104
+3.5V_ST
CDS3C30GTH
30V
30V
OPT
D1107
100
R1123
0 . 1 u F
C1105
0 . 1 u F
C1102
100
R1124
SPG09-DB-009
JK1101
1
2
3
4
5
6
7
8
9
10
JP1111
EAN41348201
MAX3232CDR
IC1101
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
PM_TXD
CDS3C30GTH
30V
30V
OPT
D1108
BAP70-02
50V
D1100
1K
R1100
+3.5V_ST
IR_OUT
20110324
GP3_S7LR
RS232C_9PIN
10
RS232C
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.
RXACK-
RXA2+
RXA1-
RXA3-
RXACK+
10K
OPT
R710
RXB1+
RXA2-
RXB3+
10uF
16V
16V
OPT
C700
RXACK+
RXBCK+
120-ohm
WAFER_FHD
L702
RXACK-
RXB0+
RXA3+
+3.3V_Normal
10uF
16V
16V
OPT
C701
RXBCK-
RXA0-
RXA4+
RXA4-
1000pF
50V
50V
C709
OPT
RXB0-
3.3K
OPT
R705
+3.3V_Normal
F I - R E 5 1 S - H F - J - R 1 5 0 0
P703
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
RXA2-
RXA0+
0 . 1 u F
16V
16V
HD
C703
RXB1-
0 . 1 u F
16V
16V
C710
WAFER_FHD
FF10001-30
P705
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
RXB2-
RXB4+
RXA0+
RXA1+
RXA0-
PANEL_VCC
1000pF
50V
50V
OPT
C702
RXA3-
10K
OPT
R711
120-ohm
HD
L701
RXA3+
RXA1+
PANEL_VCC
10K
BIT_SEL_LOW
R709
0
OPT
R713
RXB3-
RXB4-
RXB2+
RXA1-
3.3K
OPT
R712
RXA2+
20110324
GP3_S7LR
LVDS_LARGE
11
LVDS_SEL
[ 5 1 P i n L V D S C o n n e c t o r ]
( F o r F H D 6 0 / 1 2 0 H z )
BIT_SEL
LVDS_SEL
[ 3 0 P i n L V D S C o n n e c t o r ]
(For HD 60Hz_Normal)
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