Read LG 42LT760H-SA (CHASSIS:LJ3AZ) 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.
220K
R8627
330pF
C8619
220K
R8623
EXT_SPK_ROUT_MAIN
330pF
C8618
EXT_AMP_R_IN
EXT_SPK_LOUT_MAIN
EXT_AMP_L_IN
SN324
OP_AMP_AUK
I C 8 6 0 2 - * 1
3
NON_INV_IN1
2
INV_IN1
4
VCC
1
OUT1
6
INV_IN2
5
NON_INV_IN2
7
OUT2
8
OUT3
9
INV_IN3
10
NON_INV_IN3
11
GND
12
NON_INV_IN4
13
INV_IN4
14
OUT4
470K
OPT
R8622
2.2K
R8630
470K
OPT
R8621
10K
R8625
2.2K
R8628
10K
R8624
33pF
C8620
33pF
C8617
5.6K
R8626
5.6K
R8629
AS324MTR-E1
OP_AMP_BCD
IC8602
3
IN1+
2
I N 1 -
4
VCC
1
OUT1
6
I N 2 -
5
IN2+
7
OUT2
8
OUT3
9
I N 3 -
10
IN3+
11
GND
12
IN4+
13
I N 4 -
14
OUT4
+12V
0 . 1 u F
50V
50V
SCART_AMP
C8625
EXT_R_IN
EXT_L_IN
EXT_R_IN
EXT_L_IN
100
R87023
OPT
100
R87024
OPT
10uF
25V
C804
22.0uH
L803
100uF
25V
C816
+3.5V_ST
10K
OPT
R801
1uF
50V
50V
C812
4.7K
R808
0 . 1 u F
16V
C811
1uF
10V
10V
C800
10K
R806
OPT
0 . 2 2 u F
50V
50V
C807
100
R800
10K
R805
10K
OPT
R804
10K
R807
1uF
50V
50V
C803
0 . 4 7 u F
50V
50V
C815
1uF
10V
10V
C801
0 . 2 2 u F
50V
50V
C808
TPA3124D2PWPR
IC8601
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
0 . 4 7 u F
50V
50V
C814
10uF
25V
25V
C810
10uF
25V
25V
OPT
C809
4.7K
R809
EXT_SPK_L
1uF
50V
C802
10K
R802
L800
0 . 1 u F
16V
C806
EXT_SPK_R
BLM18PG121SN1D
L801
0 . 1 u F
16V
C805
100uF
25V
C817
100
R803
MMBT3904(NXP)
OPT
Q800
E
B
C
22.0uH
L802
1uF
50V
50V
C813
EXT_AMP_MUTE
MAIN_AMP_RESET
EXT_AMP_L_IN
EXT_AMP_R_IN
P E J 0 3 4 - 0 1
JK8600
6B
T_TERMINAL2
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
3
E_SPRING
10K
R812
EXT_SPK_DET
100pF
50V
OPT
C818
10K
R814
68K
R810
+3.3V_NORMAL
4.7K
OPT
R811
100pF
50V
50V
OPT
C819
C819
100
R813
EXT_SPK_L
EXT_SPK_R
0
R87025
0
R87026
MMBT3904(NXP)
Q371
E
B
C
4 . 7 u F
50V
C373
AO3407A
Q372
G
D
S
1.8K
R393
BLM18SG121TN1D
L371
0 . 1 u F
50V
50V
C372
10K
R390
1uF
25V
25V
OPT
C374
10K
R392
0 . 0 1 u F
50V
C371
10K
R391
+12V_EXT_AMP
1/8W
2K
R395
0 . 1 u F
50V
50V
C375
+12V
1/8W
2K
R394
+12V_EXT_AMP
+3.5V_ST
10K
R381
OPT
EXT_SPK_POWER_CTL
5.6K
R8632
5.6K
R8631
2 0 1 1 . 0 2 . 0 9
xxLT760H-UA
86
EXT_SPK
EXT_SPK AMP
EXT_SPK OUT
CLOSE TO MTK
EXT_SPK OP AMP
DEBUG
EXT_SPK_POWER
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