Read LG 32LK457C (CHASSIS:LB0EC) 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.
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
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