Read LG 37LH7000 / 37LH7020 / 37LH7030 (CHASSIS:LD91D) Service Manual online
+5V_ST
VGA_EEPROM_WP
ENKMC2838-T112
D400
A1
C
A2
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.
USB_DP
USB_DM
DDC_SCL/UART_RX
DDC_SDA/UART_TX
ISP_TXD
ISP_RXD
2SC3052
Q400
E
B
C
+12V
2SC3052
Q401
E
B
C
SC_RE1
2SC3052
Q402
E
B
C
SC_RE2
REC_8
0
R424
KEY2
IR
SDA_SUB/AMP
+3.3V_ST
+3.3V_ST
+5V_ST
KEY1
0
R423
SCL_SUB/AMP
+5V_VGA
+5V_EXT
SUB_SPK_MONO
100pF
50V
C410
1000pF
50V
C409
1000pF 50V
C405
18pF
50V
C401
18pF
50V
C402
0.1uF
C423
0.1uF
16V
C400
0.1uF
16V
C403
0.
1u
F
C407
0.1uF
16V
C406
0.
1u
F
C408
0
R413
R413
0
R409
R409
0
R439
BREATHING_SPK
0
R419
0
R417
100
1%
R403
100
1%
R402
100
R416
1K
R411
1K
R410
10K
R412
12K
R418
2SC3052
Q418
E
B
C
47K
R467
470
R465
DTV/MNT_VOUT
DTV/MNT_V_OUT
15K
R463
+12V
47
R470
USB_CTL
USB_OCD
001:AI16
M24C02-RMN6T
IC400
3
E2
2
E1
4
VSS
1
E0
5
SDA
6
SCL
7
WC
8
VCC
10K
R415
CDS3C05HDMI1
5.6V
D401
CDS3C05HDMI1
5.6V
D402
CDS3C05HDMI1
5.6V
D404
CDS3C05HDMI1
5.6V
D403
SCART2_Lout
+12V
LM324D
IC403
3
3
2
2
4
4
1
1
6
6
5
5
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
DTV/MNT_R_OUT
TV_L_OUT
SCART2_Rout
SCART1_Lout
TV_R_OUT
DTV/MNT_L_OUT
SCART1_Rout
2SC3052
Q426
0.1uF
C431
TV_L_OUT
2SC3052
Q428
2SC3052
Q429
DTV/MNT_R_OUT
SCART1_MUTE
0.1uF
C432
2SC3052
Q427
DTV/MNT_L_OUT
RT1P141C-T112
Q431
1
2
3
RT1P141C-T112
Q430
1
2
3
SCART2_MUTE
TV_R_OUT
180
R438
+3.3V
AMOTECH
5.6V
ZD401
AMOTECH
5.6V
ZD400
AMOTECH
5.6V
ZD402
LED_ON
4.7K
R408
+3.3V_ST
R428
OPT
47uF
6.3V
C438
4.7K
R405
4.7K
R407
4.7K
R473
10uF
10V
C422
22uF
16V
C440
4.7K
R482
SUB_WARM_ST
OPT
R483
+3.3V_ST
2K
1/16W
R449
2K
1/16W
R451
2K
1/16W
R450
2K
1/16W
R452
33K
R455
33K
R445
33K
R456
33K
R446
5.6K
R443
5.6K
R458
5.6K
R444
5.6K
R457
10K
R453
R453
10K
R447
R447
10K
R448
R448
10K
R454
R454
120K
OPT
R480
4.7K
R478
10K
R475
BLM18PG121SN1D
L400
BLM18PG121SN1D
L401
33pF
C427
33pF
C429
33pF
C428
33pF
C430
0.1uF
16V
C426
0.1uF
16V
C437
0.1uF
16V
C439
CIC21J501NE
L418
BLM15BD121SN1
L403
BLM15BD121SN1
L404
BLM15BD121SN1
L405
FE_SIF
S_Y_IN
COMP_Y
AV_CVBS_IN
FE_DEMOD_SCL
FE_TS_DATA[6]
SC1_FB
0.1uF
C425
FE_TS_DATA[0]
DSUB_B
AV_L_OUT
COMP_Pr
MLB-201209-0120P-N2
L402
SC1_G
/FE_RESET
FE_VMAIN
FE_TUNER_SDA
TV_R_OUT
FE_TS_DATA[7]
+12V
SC2_ID
HP_DET
DBG_TX
DSUB_R
0.1uF
C424
FE_TS_DATA[1]
DTV/MNT_V_OUT
FE_TS_VAL_ERR
S_C_IN
SC1_CVBS_IN
47
R440
DBG_RX
DDC_SDA/UART_TX
COMP_Pb
FE_TS_DATA[2]
FE_TUNER_SCL
DTV/MNT_R_OUT
33
AR401
SC2_CVBS_IN
SC1_B
47
R441
33
AR400
AV_R_OUT
FE_AGC_SPEED_CTL
SPDIF_OUT
DDC_SCL/UART_RX
FE_TS_DATA[3]
HP_L_OUT
DSUB_G
DTV/MNT_L_OUT
SC1_R
FE_DEMOD_SDA
+3.3V_ST
DSUB_HSYNC
HP_R_OUT
FE_TS_DATA[4]
FE_TS_SYN
22uF
16V
C421
FE_TS_SERIAL_D
TV_L_OUT
47
R442
DSUB_VSYNC
FE_AM_AUDIO
BLM18PG121SN1D
L413
SC1_ID
FE_TS_DATA[5]
FE_TS_CLK
FE_ANT5V_MONITOR
REC_8
+5V_VGA
33
R468
FE_BOOSTER_CTRL
4.7K
R404
4.7K
R406
10uF
16V
C433
10uF
16V
C434
10uF
16V
C436
10uF
16V
C435
12507WR-14L
P402
1
3.3V_SCL
2
3.3V_SDA
3
GND
4
KEY1
5
KEY2
6
5V_ST
7
GND
8
IR
9
GND
10
3.3V_ST
11
WARM_ST
12
POWER ON
13
SPK N
14
SPK P
15
0.1uF
16V
C411
0.1uF
16V
C412
OPT
AMOTECH
5.6V
D405
OPT
AMOTECH
5.6V
D406
OPT
10uF
6.3V
C415
MIC2009YM6-TR
IC401
3
ENABLE
2
GND
4
FAULT/
1
VIN
6
VOUT
5
ILIMIT
KJA-UB-0-0037
JK400
1
2
3
4
5
120
R464
750
R466
750
R462
MLB-201209-0120P-N2
120-ohm
L411
MLB-201209-0120P-N2
L412
+5V_GENERAL
6800pF
50V
C791
6800pF
50V
C792
6800pF
50V
C793
6800pF
50V
C794
1K
R496
1K
R491
1K
R490
1K
R497
ISA1530AC1
Q417
E
B
C
GF05C-96S
P400
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
41
41
42
42
43
43
44
44
45
45
46
46
47
47
48
48
49
49
50
50
51
51
52
52
53
53
54
54
55
55
56
56
57
57
58
58
59
59
60
60
61
61
62
62
63
63
64
64
65
65
66
66
67
67
68
68
69
69
70
70
71
71
72
72
73
73
74
74
75
75
76
76
77
77
78
78
79
79
80
80
81
81
82
82
83
83
84
84
85
85
86
86
87
87
88
88
89
89
90
90
91
91
92
92
93
93
94
94
95
95
96
96
97
97
22uF
16V
C416
[ PC ]
AV INPUT/SCART/IR/USB
USB
TUNER JACK PIN
[SCART2 PIN 8]
[CONTROL IR & LED]
4 10
MSD3369GV Platform
[SCART2 DTV/MNT_VOUT]
08/12/19 (MP)
Audio Out Amp
$0.18
EU_SCART [OPT]
EU_SCART [OPT]
EU_SCART [OPT]
500mVpp => 2.14Vpp
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