Read LG 42LG61YD (CHASSIS:LB81C) 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.
HDMI
D2+_HDMI3
CK+_HDMI4
HDMI_SCL
R747
0
OPT
R7003
0
HPD4
R749
0
OPT
R725
47K
HPD3
R732
22
OPT
R781
0
+3.3V_VDDP_ST
HPD1
DDC_SCL_4
007:V9;007:AE24
CK+_HDMI1
R718
0
OPT
DDC_SCL_1
C711
0.1uF
C718
0.1uF
R779
0
R708
0
R794
4.7K
OPT
EEPROM_WP
D0-_HDMI4
DDC_SDA_4
D2+_HDMI4
+3.3V_HDMI_ST
D2+_HDMI2
R750
0
OPT
R762
4.7K
OPT
+3.3V_VDDP_ST
HDMI_CLK+
R797
4.7K
R7007
36K
OPT
+5V_ST
R702
3.6K
GND
R703
1K
+5V_ST
+5V_ST
C707 0.1uF
Q703
2SC3052
E
B
C
+3.3V_VDDP_ST
R731
22
OPT
CK+_HDMI2
GND
R705
1K
C720
0.1uF
CK+_HDMI1
5V_HDMI_1
R745
0
R756
22
OPT
5V_HDMI_4
D1+_HDMI3
C705
0.1uF
D2-_HDMI2
R774
0OPT
R728
0
OPT
R7900
IC702
AT24C02BN-10SU-1.8
OPT
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
R755
22
OPT
D2+_HDMI2
R701
3.6K
5V_HDMI_1
R784
100
OPT
C704 0.1uF
R768
0
HDMI_RX0-
DDC_SCL_3
Q704
2SC3052
E
B
C
R740
0
OPT
R772
0
R741
3.6K
D2-_HDMI1
HDMI_CEC
001:J20;007:AF11
CK-_HDMI4
HPD
CK-_HDMI2
R780
0
D1+_HDMI1
D1-_HDMI1
R743
27K
R7005
36K
OPT
R7006
0
D2+_HDMI1
R709
0
DDC_SCL_1
R788
0
OPT
D2-_HDMI4
R730
22
OPT
R766
0
DDC_SDA_3
R710
0
CK-_HDMI1
CK+_HDMI3
D705
ENKMC2838-T112
A1
C
A2
DDC_SCL_3
R714
0
C716
0.1uF
R746
0
DDC_SDA_1
5V_HDMI_2
D1+_HDMI4
+3.3V_VDDP_ST
5V_HDMI_2
HDMI_RX0+
IC703
AT24C02BN-10SU-1.8
OPT
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
D2-_HDMI3
D701
ENKMC2838-T112
A1
C
A2
D0+_HDMI2
BSS83
Q705
S
BD
G
D0-_HDMI1
CK-_HDMI3
DDC_SCL_2
C709
0.1uF
DDC_SDA_3
DDC_SCL_2
R729
0
OPT
D1-_HDMI4
R744
0
OPT
R7910
HDMI_CEC
GND
R727
47K
PS421/NTP_SDA
008:H15;001:H24
D702
ENKMC2838-T112
A1
C
A2
R711
0
R706
1K
CK+_HDMI3
SDA_EYEQ/AMP
Q701
2SC3052
E
B
C
R713
0
D0+_HDMI4
R716
0
OPT
D0-_HDMI2
D0+_HDMI1
C701
0.1uF
50V
HPD2
PS421/NTP_SCL
R765
36K
OPT
D1-_HDMI2
R742
1K
DDC_SCL_2
007:H17;007:AJ9
D0-_HDMI2
EEPROM_WP
CEC_REMOTE
007:F26;007:F17;007:O16;007:T8
D704
MMBD301LT1G
30V
A
C
D1+_HDMI2
CK-_HDMI4
D0+_HDMI1
DDC_SCL_3
EEPROM_WP
CK-_HDMI3
5V_HDMI_3
001:H24;007:O23;007:AD13
D0-_HDMI3
D1+_HDMI1
HDMI_RX2-
GND
C712
0.1uF
R783
100
OPT
CEC_REMOTE
DDC_SDA_2
CEC_REMOTE
007:F8;007:F26;007:F17;007:T8
R773
0
D0-_HDMI3
D1+_HDMI4
HDMI_RX2+
R707
0
R764
0
HPD1
CK-_HDMI2
R775
0
OPT
D0-_HDMI1
D0-_HDMI4
R753
22
OPT
R704
3.6K
D706
ENKMC2838-T112
A1
C
A2
HPD2
DDC_SDA_4
R796
4.7K
OPT
5V_HDMI_4
DDC_SCL_1
R771
0
5V_HDMI_3
D2-_HDMI2
R754
22
OPT
DDC_SCL_4
D1-_HDMI3
DDC_SDA_1
HDMI_RX1+
DDC_SCL_4
DDC_SDA_4
+5V_ST
R7008
0
R719
0
OPT
CK+_HDMI2
R770
0
5V_HDMI_3
R795
510
HPD4
HDMI_RX1-
R761
4.7K
OPT
Q702
2SC3052
E
B
C
R715
0
C702
0.1uF
50V
R776
4.7K
OPT
D2+_HDMI4
R769
0
D2+_HDMI3
D1-_HDMI2
R7920
C715
2.2uF
R7001
0
R789
0
OPT
R712
0
R787
0
OPT
R737
68K
R798
0
5V_HDMI_2
001:H23;007:W29;007:AM11
+3.3V_VDDP_ST
D1-_HDMI1
C706
0.1uF
50V
GND
D0+_HDMI4
D1+_HDMI2
CK-_HDMI1
DDC_SDA_3
HDMI_CLK-
C710
0.1uF
C714
0.1uF
HPD3
007:AF11
R738
0
OPT
D1+_HDMI3
D2-_HDMI4
IC701
AT24C02BN-10SU-1.8
OPT
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
D0+_HDMI2
R7002
0
EEPROM_WP
D703
OPT
D1-_HDMI3
C717
0.1uF
5V_HDMI_1
001:H23;007:O28;007:AK25
SCL_EYEQ/AMP
CEC_REMOTE
R763
36K
OPT
CEC_REMOTE
D0+_HDMI3
R786
0
OPT
D1-_HDMI4
R7004
0
D2-_HDMI3
D0+_HDMI3
D2-_HDMI1
GND
C703
0.1uF
50V
D2+_HDMI1
R767
4.7K
OPT
R733
22
OPT
DDC_SDA_2
R752
47K
R723
47K
IC704
AT24C02BN-10SU-1.8
OPT
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
DDC_SDA_2
HDMI_SDA
JK704
DC1R019NBH
EAG42025501
14
NC
13
CEC
5
DATA1_SHIELD
20
JACK_GND
12
CLK-
11
CLK_SHIELD
2
DATA2_SHIELD
19
HPD
18
+5V_POWER
10
CLK+
4
DATA1+
1
DATA2+
17
DDC/CEC_GND
9
DATA0-
8
DATA0_SHIELD
3
DATA2-
16
SDA
7
DATA0+
6
DATA1-
15
SCL
DDC_SDA_1
C719
0.1uF
R799
0
CK+_HDMI4
5V_HDMI_4
C713
0.1uF
C708 0.1uF
R722
1K
R724
1K
R726
1K
R751
1K
JK702
EAG39789401
1
D2+
2
D2_GND
3
D2-
4
D1+
5
D1_GND
6
D1-
7
D0+
8
D0_GND
9
D0-
10
CK+
11
12
13
14
15
16
17
18
19
20
GND
21
GND
22
JK701
EAG39789401
1
D2+
2
D2_GND
3
D2-
4
D1+
5
D1_GND
6
D1-
7
D0+
8
D0_GND
9
D0-
10
CK+
11
12
13
14
15
16
17
18
19
20
GND
21
GND
22
JK703
EAG39789401
1
D2+
2
D2_GND
3
D2-
4
D1+
5
D1_GND
6
D1-
7
D0+
8
D0_GND
9
D0-
10
CK+
11
12
13
14
15
16
17
18
19
20
GND
21
GND
22
R7009
0
R7010
0
OPT
+3.3V_CI
R777
3.3K
R778
3.3K
JP7010
JP7009
JP7003
JP7004
JP7005
JP7006
JP7002
JP7001
JP7007
JP7008
JP7012
JP7011
R735
10K
R739
10K
R757
10K
R758
10K
R759
10K
R734 10K
R760
10K
R736
10K
R7850
R7011
0
IC705
PS421
1
SCL1
2
SDA1
3
GPD1
4
POW1
5
CEC
6
DDCBUF_EN
7
GND_1
8
CEXT
9
PC0/I2C_RST
10
PC1/I2C_ADDR1
11
TEST
12
VCC_1
13
ECE_IN
14
CEC_OUT
15
S1/SDA_CTL
16
S2/SCL_CTL
17
S3/I2C_ADDR0
18
OE#/POWDN
19
I2C_CTL_EN
20
REXT
21
GND_2
22
POW4
23
HPD4
24
SDA4
25
SCL4
26
GND_3
27
IN4D1N
28
IN4D1P
29
VCC_2
30
IN4D2N
31
IN4D2P
32
GND_4
33
IN4D3N
34
IN4D3P
35
VCC_3
36
IN4D4N
37
IN4D4P
38
GND_5
39
IN3D1N
40
IN3D1P
41
VCC_4
42
IN3D2N
43
IN3D2P
44
GND_6
45
IN3D3N
46
IN3D3P
47
VCC_5
48
IN3D4N
49
IN3D4P
50
GND_7
51
SCL3
52
SDA3
53
HPD3
54
POW3
55
GND_8
56
OUT_D4P
57
OUT_D4N
58
VCC_6
59
OUT_D3P
60
OUT_D3N
61
GND_9
62
OUT_D2P
63
OUT_D2N
64
VCC_7
65
OUT_D1P
66
OUT_D1N
67
GND_10
68
SCL_SINK
69
SDA_SINK
70
HPD_SINK
71
POW_SINK
72
POW2
73
HPD2
74
SDA2
75
SCL2
76
GND_11
77
IN2D1N
78
IN2D1P
79
VCC_8
80
IN2D2N
81
IN2D2P
82
GND_12
83
IN2D3N
84
IN2D3P
85
VCC_9
86
IN2D4N
87
IN2D4P
88
GND_13
89
IN1D1N
90
IN1D1P
91
VCC_10
92
IN1D2N
93
IN1D2P
94
GND_14
95
IN1D3N
96
IN1D3P
97
VCC_11
98
IN1D4N
99
IN1D4P
100
GND_15
R793
0
R782
0
R720
1K
R721
1K
R717
1K
R748
1K
R7019
2.7K
R7020
2.7K
R7021
0
OPT
PS421_RST
SIDE HDMI
UI_HW_PORT3
UI_HW_PORT1
UI_HW_PORT2
UI_HW_PORT4
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