Read LG 37LH7000 / 37LH7020 / 37LH7030 (CHASSIS:LD91D) Service Manual online
0.1uF
50V
C729
OPT
0.1uF 50V
C749
0.1uF
50V
C735
SPK_R+
007:AA17
POWER_DET
22000pF
50V
C732
SPK_R-
007:AA17
MS_LRCK
002:V8
+24V_AMP
0.1uF
50V
C728
4.7K
R730
AMP_MUTE
002:C25
0.1uF
50V
C733
OPT
SDA_SUB/AMP
001:L3;004:Y11
SPK_L-
007:AA18
0.1uF 50V
C750
4.7K
R732
MS_LRCH
002:V8
SPK_L+
007:AA18
MS_SCK
002:V8
AUDIO_MASTER_CLK
002:V8
+24V_AMP
0.1uF
50V
C734
22000pF 50V
C731
+1.8V_AMP
22000pF 50V
C726
+1.8V_AMP
0.1uF
50V
C752
0.1uF
50V
C751
AMP_RST
001:AA9
SCL_SUB/AMP
001:L3;004:Y11
4.7K
R733
22000pF
50V
C716
4.7K
R731
+1.8V_AMP
SPK_R-
007:AG19
SPK_L-
007:AG24
SPK_L+
007:AG26
SPK_R+
007:AG22
+24V_AMP
HP_ROUT
002:Y10
HP_LOUT
002:Y10
TPA6110A2DGNRG4
IC700
3
SHUTDOWN
2
GND
4
IN2-
1
BYPASS
5
VO2
6
VDD
7
VO1
8
IN1-
+5V_GENERAL
20K
R712
20K
R702
1uF
10V
C701
2SC3052
Q700
E
B
C
HP_MUTE
1N4148W
100V
D704
OPT
1N4148W
100V
D705
OPT
1N4148W
100V
D707
OPT
1N4148W
100V
D706
OPT
0.22uF 16V
C703
0.22uF
16V
C717
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.
+3.3V
2SC3052
Q701
E
B
C
+3.3V_ST
HP_L_OUT
HP_R_OUT
+24V
10uF 10V
C700
0.1uF
C709
0.1uF
16V
C702
0.1uF
16V
C710
0.1uF
16V
C706
0.1uF 16V
C715
1000pF
50V
C707
1000pF 50V
C708
33pF
50V
C714
33pF
50V
C712
10K
R700
10K
R729
10K
R724
10K
R701
10uF 10V
C704
10uF
10V
C760
0.1uF 50V
C720
100
R721
100
R720
100
R722
HP_LOUT
+5V_GENERAL
BT_AU_SW
680K
R744
+5V_GENERAL
680K
R743
MC74HC4066ADR2G
IC702
3
YB
2
YA
4
XB
1
XA
6
CONTROL_C
5
CONTROL_B
7
GND
8
XC
9
YC
10
YD
11
XD
12
CONTROL_D
13
CONTROL_A
14
VCC
680K
R751
+5V_GENERAL
680K
R752
HP/BT_ROUT
+5V_GENERAL
HP/BT_LOUT
0
OPT
R745
BT_ON/OFF
1uF
C771
BT_DM
+5V_GENERAL
2SC3052
Q705
E
B
C
BT_DP
BT_LOUT_AMP
RTR030P02
Q706
S
D
G
+5V_GENERAL
HP_AU_SW
BT_LOUT
HP_ROUT
12507WR-08L
P701
1
2
3
4
5
6
7
8
9
100uF
16V
C719
100uF
16V
C718
0
OPT
R719
33K
R717
OPT
10K
R753
4.7K
R748
47K
R746
10K
R741
0
R740
100
R704
100
R709
100
R710
0
R749
BLM18PG121SN1D
L700
BLM18PG121SN1D
L701
0
R742
0
R750
0.1uF
16V
C773
1000pF
OPT
C723
1000pF
OPT
C722
0.47uF 50V
C745
0.47uF 50V
C746
CIC21J501NE
L703
1K
R715
1K
R714
100pF
50V
C705
390pF 50V
C743
390pF 50V
C744
390pF 50V
C742
390pF 50V
C741
0.01uF 50V
C756
0.01uF
50V
C758
0.01uF 50V
C755
0.01uF
50V
C757
3.3
R736
3.3
R737
3.3
R735
3.3
R734
0
R747
100
R718
2.2uF
16V
C770
2.2uF
16V
C772
10uF 10V
C736
OPT
10uF 10V
C737
OPT
2SC3052
Q707
E
B
C
10K
R707
+3.3V_ST
R705
OPT
10K
R713
CIC21J501NE
L780
OPT
47K
R785
BT_LOUT_AMP
2SC3052
Q781
E
B
C
+12V
0.1uF
16V
C783
15K
R786
BT_LOUT
0.1uF
16V
C784
470
R784
3K
R781
3K
R782
0.1uF
16V
C782
OPT
10uF
6.3V
C781
1K
R783
47K
R780
OPT
22uF
16V
C780
0
R756
0
R757
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
D V
D D
17
S D
A T
A
18
W C
K
19
B C
K
20
S D
A
21
SCL
22
MONITOR_0
23
MONITOR_1
24
MONITOR_2
25
F A
U L
T
26
V D
R 2B
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
V D
R 1B
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
C725
C762
2SA1504S
Q780
E
B
C
ENKMC2838-T112
D708
A1
C
A2
+5V_EARPHONE
+5V_EARPHONE
+5V_EARPHONE
10uF
10V
C711
10uF
10V
C790
0.1uF 50V
C724
0.1uF
50V
C730
0.1uF 50V
C727
0.1uF
50V
C713
0.1uF
16V
C721
3.3K
R708
SMAW250-04Q
P700
1
2
3
4
5
20K
R706
20K
R711
AD-8770
EAP60684501
L704
2S
1S
1F
2F
AD-8770
EAP60684501
L705
2S
1S
1F
2F
12
R727
12
R792
12
R791
12
R793
12
R726
12
R725
12
R728
12
R790
0
R754
CIC21J501NE
L781
0.1uF
16V
C785
+5V_GENERAL
SPEAKER_L
SPEAKER_R
EARPHONE AMP
AUDIO/BT/FAN
7
1
0
MSD3369GV Platform
0
8
/
12/26 (MP)
MCLK SDATA WCK BCK TP is necessory
BT & HP AUDIO SWITCH
BLUETOOTH
68uF/35V
105
105
68uF/35V
For protect Peak noise
BLUETOOTH Audio TR Amp
EU_HP[OPT]
360mVrms(8mW) => 450mVrms(13mW)
15uH
15uH
Click on the first or last page to see other 37LH7000 / 37LH7020 / 37LH7030 (CHASSIS:LD91D) service manuals if exist.