Read LG 42LH250C (CHASSIS:LD91Z) Service Manual online
0 . 1 u F
50V
50V
C729
0 . 1 u F
50V
C749
0 . 1 u F
50V
50V
C735
SPK_R+
007:AH12
3 . 3
R734
22000pF
50V
C732
0 . 4 7 u F
50V
C746
SPK_R-
007:AH13
MS_LRCK
002:X23
AMP_VCC
0 . 0 1 u F
50V
50V
C758
3 . 3
R736
0 . 1 u F
50V
C728
0 . 0 1 u F
50V
C756
4.7K
R730
0 . 1 u F
50V
C733
0 . 0 1 u F
50V
50V
C757
DA-8580
EAP38319001
EAP38319001
L704
2S
1S
1F
2F
SDA_SUB/AMP
0 0 1 : F 2 1
SPK_L-
007:AH12
0 . 1 u F
50V
C750
3 . 3
R737
4.7K
R732
MS_LRCH
002:X23
SPK_L+
007:AH11
MS_SCK
002:X23
AUDIO_MASTER_CLK
002:X22
0 . 1 u F
50V
50V
C734
22000pF
50V
50V
C731
+1.8V_AMP
22000pF
50V
C726
+1.8V_AMP
0 . 4 7 u F
50V
C745
0 . 1 u F
50V
50V
C752
0 . 1 u F
50V
50V
C751
AMP_RST
001:AA21
DA-8580
EAP38319001
EAP38319001
L705
2S
1S
1F
2F
0 . 0 1 u F
50V
C755
3 . 3
R735
SCL_SUB/AMP
0 0 1 : F 2 1
4.7K
R733
22000pF
50V
50V
C716
4.7K
R731
+1.8V_AMP
SPK_R-
0 0 7 : A J 8
SPK_L-
0 0 7 : A J 4
SPK_L+
0 0 7 : A J 2
SPK_R+
0 0 7 : A J 6
WAFER-ANGLE
P700
1
2
3
4
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.
+3.3V
2SC3052
Q701
E
B
C
+3.3V_ST
AMP_VCC
SB_MUTE
001:AA19;007:E23;009:AA22
NTP_MUTE
001:AA22
ENKMC2838-T112
D709
A1
C
A2
100
R722
100
R720
100
R721
1N4148W
100V
OPT
D704
1N4148W
100V
OPT
D705
1N4148W
100V
OPT
D706
1N4148W
100V
OPT
D707
BLM18PG121SN1D
L700
BLM18PG121SN1D
L701
33pF
50V
C712
33pF
50V
50V
C714
100
R710
100
R709
12
R726
12
R727
12
R725
12
R728
12
R716
12
R705
12
R713
12
R719
10uF
35V
35V
C725
10uF
35V
35V
C736
0
R740
0
R703
0 . 1 u F
C709
0 . 1 u F
16V
16V
C702
0 . 1 u F
16V
C715
0 . 1 u F
16V
16V
C706
100
R704
1000pF
50V
C741
1000pF
50V
50V
C707
1000pF
50V
50V
C708
1000pF
50V
C743
1000pF
50V
C742
1000pF
50V
C744
100pF
50V
50V
C705
10K
R724
10K
R729
3.3K
R708
33K
R717
OPT
NTP-3100L
EAN60664001
IC701
1
BST1A
2
VDR1A
3
RESET
4
AD
5
DVSS_1
6
VSS_IO
7
CLK_I
8
VDD_IO
9
DGND_PLL
10
AGND_PLL
11
LFM
12
AVDD_PLL
13
DVDD_PLL
14
TEST0
15
DVSS_2
16
DVDD
17
SDATA
18
WCK
19
BCK
20
SDA
21
SCL
22
MONITOR_0
23
MONITOR_1
24
MONITOR_2
25
FAULT
26
VDR2B
27
BST2B
28
PGND2B_1
29
PGND2B_2
30
OUT2B_1
31
OUT2B_2
32
PVDD2B_1
33
PVDD2B_2
34
PVDD2A_1
35
PVDD2A_2
36
OUT2A_1
37
OUT2A_2
38
PGND2A_1
39
PGND2A_2
40
BST2A
41
VDR2A
42
NC
43
VDR1B
44
BST1B
45
PGND1B_1
46
PGND1B_2
47
OUT1B_1
48
OUT1B_2
49
PVDD1B_1
50
PVDD1B_2
51
PVDD1A_1
52
PVDD1A_2
53
OUT1A_1
54
OUT1A_2
55
PGND1A_1
56
PGND1A_2
120-ohm
L709
120-ohm
L706
120-ohm
L708
120-ohm
L707
0 . 1 u F
16V
C727
0 . 1 u F
16V
C713
0 . 1 u F
16V
C724
0 . 1 u F
16V
C730
1uF
10V
C700
1uF
10V
10V
C704
1uF
10V
C760
100
R718
0 . 1 u F
16V
16V
C721
0 . 1 u F
50V
C720
10K
R745
1uF
C765
10K
R744
100uF
25V
25V
C778
1uF
C764
DA-8580
EAP38319001
EAP38319001
L713
2S
1S
1F
2F
0 . 1 u F
50V
C768
EXT_OUT_R
0 0 4 : P 1 0
EXT_L_AMP
002:X22
1uF
16V
16V
C763
TPA3124D2PWPR
IC702
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
100uF
25V
25V
C777
4.7K
R743
4.7K
R750
10K
OPT
R747
10uF
50V
50V
C772
1uF
16V
16V
C766
0 . 1 u F
50V
50V
C771
SUBAMP_SD
001:AA20
4.7K
R749
10K
OPT
R746
0 . 2 2 u F
50V
50V
C770
10K
R748
2SC3052
Q702
E
B
C
SUBAMP_MUTE
0 0 1 : A I 1 4
EXT_OUT_L
0 0 4 : P 1 0
EXT_R_AMP
002:X21
0 . 1 u F
50V
C767
0 . 2 2 u F
50V
50V
C769
CB3216UA121
L712
AMP_VCC
27K
R706
27K
R711
0 . 1 u F
16V
C710
HP_DET
10K
R741
22uF
16V
16V
C761
0 . 1 u F
C723
1K
R715
+5V_ST
DJ-S3600LM
JK700
BOTTOM_EARPHONE
1
2
3
4
5
HP_ROUT
002:X21
BLM18PG121SN1D
L711
ENKMC2838-T112
D700
A1
C
A2
SIDE_HP_MUTE
0 0 1 : A J 1 9
47uF 16V
C718
10K
R707
P E J 0 2 6 - 0 1
TOP_EARPHONE
JK701
3
TRANSFER[L]
4
BREAK[L]
5
C-LUG-EL
6
C-LUG-ES
7
C-LUG-ER
8
BREAK[R]
9
TRANSFER[R]
10
FIX-TER
+5V_EARPHONE
+3.3V
22uF
16V
16V
C762
ENKMC2838-T112
D708
A1
C
A2
0 . 2 2 u F
16V
C717
+5V_EARPHONE
47uF 16V
C719
1uF
6.3V
6.3V
C701
+5V_GENERAL
2SC3052
Q700
E
B
C
AMOTECH
5.6V
D711
BLM18PG121SN1D
L710
OPT
TPA6110A2DGNRG4
IC700
3
SHUTDOWN
2
GND
4
I N 2 -
1
BYPASS
5
VO2
6
VDD
7
VO1
8
I N 1 -
0 . 1 u F
C722
HP_LOUT
002:X21
20K
R702
2SC3052
Q705
E
B
C
SB_MUTE
001:AA19;007:Y12;009:AA22
10K
R742
100uF
16V
16V
C711
20K
R712
1K
R714
10K
R701
10K
R700
0 . 2 2 u F
16V
C703
AMOTECH
5.6V
D710
+5V_EARPHONE
1uF
50V
50V
C774
1uF
50V
50V
C773
0 . 4 7 u F
50V
50V
C775
0 . 4 7 u F
50V
50V
C776
SPEAKER_L
SPEAKER_R
7 1 1
AMP
MCLK SDATA WCK BCK TP is necessory
M o n i t o r 0 _ 1 _ 2 T P i s n e c e s s o r y
EXT_SPEAKER_AMP
2A => 5A
EARPHONE AMP
2 0 0 9 . 0 6 . 0 9
EAX61353501
COMMERCIAL_LITE LH250
AMP
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