Read LG 32LH70YD (CHASSIS:LJ91D) 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.
2008.10.15
BRAZIL VENUS
IR
12:D4;A3
SPK_INCM
10:C6
+5V_ST
ZD1104
OPT
C1109
1000pF
50V
C1107
0.1uF
C1108
0.47uF
C1101
0.1uF
UCOM_SCL_3.3V
12:F6
ZD1101
C1104
0.1uF
UCOM_SDA_3.3V
12:F6
ZD1103
KEY2
12:H3
C1105
0.1uF
0.1uF
16V
OPT
+3.3V_ST
SPK_P
10:C6
KEY1
12:H3
C1102
0.1uF
ZD1105
OPT
R1105
5.1
LED_WARM_STBY
ZD1108
8.2V
P1101
12507WR-14L
1
SCL
2
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
GND
14
AUDIO_OUT
15
C536
0.1uF
16V
R510
0
R514
0
RS232C_RxD
A3
BCM_RX
9:G6
BCM_TX
9:G6
C537
47uF
16V
16V
+5.0V
IC502
MC14053BDR2G
0ISTL00024A
3
Z1
2
Y0
4
Z
1
Y1
6
INH
5
Z0
7
VEE
8
VSS
9
C
10
B
11
A
12
X0
13
X1
14
X
15
Y
16
VDD
+5V_ST
R516
0
RS232_BYPASS
R512
0
0
RS232_BYPASS
UCOM_RX
12:D4
UCOM_TX
12:D4
RS232C_TxD
A3
COMP1_R_IN
10:C6
TU_CVBS_IN
11:B4
GAIN_SWITCH
9:G7
RS232C_RxD
I2
D1.2V
TU_SCLK
10:D1
PC_L_IN
10:C6
COMP2_DET
9:G4
TU_SYNC
10:D1
AV1_CVBS_IN
11:B4
COMP2_Pb_IN
11:C4
+5V_ST
SIDE_L_IN
10:C6
DDC_SCL
9:G7;12:D5
SCL0_3.3V
9:I4
SDA0_3.3V
9:I4
AV1_CVBS_DET
9:G5
R703
0
+12V
R704
0
TU_SDATA
10:D1
DSUB_DET
9:G7
TUNER_RESETb9:G7;9:I3
SPDIF_OUT
11:E5
COMP2_R_IN
10:C6
D3.3V
COMP1_Pb_IN
11:B5
DSUB_B
11:B5
COMP2_Y_IN
11:C4
SIDE_CVBS_DET
9:G6
RGB_VSYNC
11:D2
D2.5V
AV1_R_IN
10:C5
TU_SIF
11:B3
DSUB_G
11:B5
SIDE_R_IN
10:C6
COMP1_Pr_IN
11:B5
EDID_WP
12:I4
COMP2_Pr_IN
11:C4
COMP1_DET
9:G4
PC_R_IN
10:C6
RS232C_TxD
I2
DSUB_R
11:B5
SIDE_CVBS_IN
11:B3
RF_SWITCH
9:G6
R707
0
DDC_SDA
9:G7;12:D4
R701
0
COMP2_L_IN
10:C6
COMP1_Y_IN
11:B5
AV1_L_IN
10:C5
IR
12:D4;E6
RGB_HSYNC
11:D2
COMP1_L_IN
10:C6
USB_OCD1
10:D4
USB_CTL1
10:D5
USB_DP2 10:D4
R711
47
D703
5.6V
CDS3C05GTA
OPT
USB_DM1
10:D4
C703
100uF
16V
16V
BLUETOOTH_RESET
C701
0.1uF
16V
D3.3V
D704
5.6V
CDS3C05GTA
OPT
D701
5.6V
CDS3C05GTA
OPT
USB_DM2
10:D4
R702
180
D702
5.6V
CDS3C05GTA
OPT
D3.3V
VREG_CTRL
L703
BLM18PG121SN1D
IC701
MIC2009YM6-TR
3
ENABLE
2
GND
4
FAULT/
1
VIN
6
VOUT
5
ILIMIT
USB_DP1
10:D4
C2017
0.1uF
16V
0.1uF
16V
ZD1107
C
D
S
3
C
0
5
H
D
M
I
1
ZD1106
C
D
S
3
C
0
5
H
D
M
I
1
C2019
1000pF
50V
1000pF
50V
OPT
C2020
1000pF
50V
1000pF
50V
OPT
L1102
BG2012B080TF
L1104
BG2012B080TF
L1103
BG2012B080TF
L1105
CB3216PA501E
L1101
CB3216PA501E
R712
2.7K
2.7K
R713
2.7K
2.7K
R2022
0
0
R2019
0
0
R2021
0
0
OPT
ZD1102
5.6V
C
D
S
3
C
0
5
H
D
M
I
1
R705
0
R706
0
JP703
JP702
JP704
+5.0V
USB_POWER_OUT_2
USB_POWER_OUT_2
P704
KJA-UB-0-0037
1
2
3
4
5
C1103
100pF
R3022
27
27
R3023
27
27
P701
GF05C-96S
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
R1102
0
R3034
4.7K
4.7K
+3.3V_ST
R3035
10K
C3015
0.1uF
16V
0.1uF
16V
Q904
2SC3052
OPT
E
B
C
+3.3V_ST
R2020
10K
R3037
120K
OPT
R3036
0
0
Q905
2SC3052
E
B
C
R3038
0
0
OPT
R3039
0
0
OPT
R3040
0
0
RL_ON
LED_POWER_ON
C705
100uF
C3018
100uF
16V
16V
P705
12507WR-10L
1
2
3
4
5
6
7
8
9
10
11
JP1112
R4063
0
0
R4051
0
R4052
0
R4053
0
R4054
0
R4055
0
R4056
0
R4057 0
R4058
0
R4059
0
R4050 0
R4060
0
R4061 0
R4062
0
L701
MLB-201209-0120P-N2
L506
MLB-201209-0120P-N2
L702
CB3216PA501E
R517
4.7K
4.7K
R_RS232_SWITCHING
R517-*1
2.7K
RS-232 SET ON PROBLEM
R515-*1
4.7K
4.7K
RS-232 SET ON PROBLEM
R515
100K
15
14
PCB Path(SPK_INCM) go along The SPK_N/P
* CONTROL IR & LED
RS232_SWITCHING
BCM Tolerance
USB JACK & USB +5V Current Protection
* Blue Tooth
Make this trace minimum 12 mil
DO.J.G
ETC SUB BOARD I/F
Not enough space
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