Read LG 55LH45YD (CHASSIS:LC91B) 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.
GND
D601
ENKMC2838-T112
A1
C
A2
DDC_SDA_1
2:E10;AL9
D0+_HDMI4
2:E13
+5V_ST
D0-_HDMI2
2:E11
DDC_SDA_4
2:E14;AL14
CK+_HDMI2
2:E10
EDID_WP
CEC_REMOTE
K19;K8;AH25
DDC_SDA_2
2:E12;AL19
D1+_HDMI1
2:E9
D2-_HDMI2
2:E12
EDID_WP
D602
ENKMC2838-T112
A1
C
A2
DDC_SDA_4
DDC_SCL_4
D1+_HDMI2
2:E11
D0+_HDMI1
2:E8
5V_HDMI_2
DDC_SDA_1
D0-_HDMI4
2:E13
CK-_HDMI4
2:E13
DDC_SCL_1
2:E10;AL9
D1-_HDMI2
2:E11
5V_HDMI_4
D0+_HDMI2
2:E11
D2+_HDMI4
2:E14
GND
D1-_HDMI1
2:E9
D1-_HDMI4
2:E14
D2-_HDMI4
2:E14
CK-_HDMI1
2:E8
D2+_HDMI1
2:E9
+5V_ST
GND
CK+_HDMI4
2:E13
GND
CEC_REMOTE
K19;X14;AH25
CK-_HDMI2
2:E11
DDC_SCL_4
2:E15;AL13
D0-_HDMI1
2:E9
DDC_SCL_2
D1+_HDMI4
2:E14
DDC_SCL_2
2:E12;AL18
D2-_HDMI1
2:E9
DDC_SCL_1
+5V_ST
CEC_REMOTE
K8;X14;AH25
D600
ENKMC2838-T112
A1
C
A2
DDC_SDA_2
5V_HDMI_1
D2+_HDMI2
2:E12
CK+_HDMI1
2:E8
EDID_WP
JK602
EAG42463001
14
13
5
D1_GND
20
JACK_GND
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
5V_HDMI_1
HPD1
Q601
2SC3052
E
B
C
5V_HDMI_2
HPD2
Q602
2SC3052
E
B
C
5V_HDMI_4
HPD4
Q603
2SC3052
E
B
C
Q604
2SC3052
HDMI3
E
B
C
D0+_HDMI3
GND
D0-_HDMI3
CEC_REMOTE
HPD3
DDC_SDA_3
D2+_HDMI3
D2-_HDMI3
5V_HDMI_3
D1-_HDMI3
D1+_HDMI3
DDC_SCL_3
CK+_HDMI3
CK-_HDMI3
DDC_SCL_3
+5V_ST
EDID_WP
DDC_SDA_3
D606
ENKMC2838-T112
HDMI3
A1
C
A2
5V_HDMI_3
IC603
TMDS351PAGR
TMDS351PAG
1
SDA3
2
SCL3
3
GND_1
4
B31
5
A31
6
VCC_1
7
B32
8
A32
9
GND_2
10
B33
11
A33
12
VCC_2
13
B34
14
A34
15
GND_3
16
VSADJ
17
Y4
18
Z4
19
VCC_3
20
Y3
21
Z3
22
GND_4
23
Y2
24
Z2
25
VCC_4
26
Y1
27
Z1
28
GND_5
29
SCL_SINK
30
SDA_SINK
31
HPD_SINK
32
S1
33
S2
34
EQ
35
HPD1
36
SDA1
37
SCL1
38
B11
39
A11
40
VCC_5
41
B12
42
A12
43
GND_6
44
B13
45
A13
46
VCC_6
47
B14
48
A14
49
VDD
50
HPD2
51
SDA2
52
SCL2
53
B21
54
A21
55
VCC_7
56
B22
57
A22
58
GND_7
59
B23
60
A23
61
VCC_8
62
B24
63
A24
64
HPD3
L600
BLM18PG121SN1D
+3.3V
R624
4.7K
1/10W
1%
D2+_HDMI_SW
D2-_HDMI_SW
D1+_HDMI_SW
D1-_HDMI_SW
D0+_HDMI_SW
D0-_HDMI_SW
CK+_HDMI_SW
CK-_HDMI_SW
DDC_SCL_SW
SEL1_HDMI_SW
SEL2_HDMI_SW
+3.3V_HDMI
DDC_SDA_SW
DDC_SCL_3
D0-_HDMI3
D1-_HDMI3
CK+_HDMI3
D1+_HDMI3
D0+_HDMI3
D2+_HDMI3
CK-_HDMI3
DDC_SDA_3
D2-_HDMI3
D1+_HDMI2
D0-_HDMI2
D1-_HDMI2
D2+_HDMI2
D0+_HDMI2
CK+_HDMI2
DDC_SDA_2
DDC_SCL_2
D2-_HDMI2
CK-_HDMI2
D0+_HDMI1
DDC_SCL_1
D1-_HDMI1
CK+_HDMI1
DDC_SDA_1
D0-_HDMI1
D2-_HDMI1
CK-_HDMI1
D2+_HDMI1
D1+_HDMI1
D605
30V
MMBD301LT1G
+5V_HDMI_SW
IC603-*1
BU16027KV
BU16027KV
1
SDA3
2
SCL3
3
GND_1
4
B31
5
A31
6
VCC_1
7
B32
8
A32
9
GND_2
10
B33
11
A33
12
VCC_2
13
B34
14
A34
15
GND_3
16
VSADJ
17
Y4
18
Z4
19
VCC_3
20
Y3
21
Z3
22
GND_4
23
Y2
24
Z2
25
VCC_4
26
Y1
27
Z1
28
GND_5
29
SCL_SILK
30
SDA_SILK
31
HPD_SILK
32
S1
33
S2
34
RESERVE1
35
HPD1
36
SDA1
37
SCL1
38
B11
39
A11
40
VCC_5
41
B12
42
A12
43
GND_6
44
B13
45
A13
46
VCC_6
47
B14
48
A14
49
RESERVE2
50
HPD2
51
SDA2
52
SCL2
53
B21
54
A21
55
VCC_7
56
B22
57
A22
58
GND_7
59
B23
60
A23
61
VCC_8
62
B24
63
A24
64
HPD3
IC600
CAT24C02WI-GT3
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
IC602
CAT24C02WI-GT3
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
IC601
CAT24C02WI-GT3
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
IC604
CAT24C02WI-GT3
HDMI3
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
R623
0
R621
0
R642
0
R619
0
R622
0
R640
0
R641
0
HDMI3
R648
0
HDMI3
R620
0
R618
0
R647
0
HDMI3
R645
0
R607
0
R639
0
HDMI3
R609
0
R605
0
C615 0.1uF
HDMI3
C603
0.1uF
C607 0.1uF
C604 0.1uF
C600
0.1uF
16V
C602
0.1uF
16V
C606
0.1uF
16V
HDMI3
C601
0.1uF
16V
C612 0.1uF
C611 0.1uF
C609 0.1uF
C608 0.1uF
C613 0.1uF
C610 0.1uF
C614 0.1uF
C616
0.1uF
R617
10K
R616
10K
R634
10K
HDMI3
R615
10K
R614
1K
R635
1K
HDMI3
R612
1K
R613
1K
R611
22
R637
22
HDMI3
R610
22
R603
22
R604
22
R638
22
HDMI3
R636
2K
HDMI3
R602
2K
R601
2K
R600
2K
R650
4.7K
4.7K
OPT
HDMI_CEC
+3.3V_ST
R625
0
D603
MMBD301LT1G
30V
R631
OPT
GND
R627
120K
C605
0.1uF
16V
OPT
CEC_REMOTE
Q600
SSM6N15FU
OPT
3
DRAIN2
2
GATE1
1
SOURCE1
4
SOURCE2
5
GATE2
6
DRAIN1
R632
0
OPT
HDMI_EQ_SEL
R633
4.7K
+3.3V
L601
BLM18PG121SN1D
+3.3V_HDMI
C617
0.1uF
R651
4.7K
R652
4.7K
R653
10K
R654
10K
R655
10K
HDMI3
R656
10K
+3.3V_HDMI
R608
22
R606
22
JK603
EAG39789402
HDMI3
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
21
22
JK600
EAG39789402
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
21
22
JK601
EAG39789402
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
21
22
R662
4.7K
4.7K
OPT
R661
4.7K
4.7K
OPT
+3.3V_HDMI
R667
10K
OPT
R663
1K
OPT
+3.3V_HDMI
+3.3V_HDMI
R668
10K
OPT
R665
1K
OPT
R664
1K
OPT
R669
1K
OPT
+3.3V_HDMI
R666
10K
OPT
+3.3V_HDMI
R670
10K
OPT
R644
4.7K
HDMI3
R628 4.7K
R630
4.7K
R643 4.7K
HDMI3
R649
4.7K
R626
4.7K
R646
4.7K
R629
4.7K
R657
0
OPT
R658
0
OPT
R660
0
OPT
R659
0
OPT
UI_HW_PORT4
UI_HW_PORT1
UI_HW_PORT2
EAX60737402
6 13
HDMI
2009. 1.15.
SIDE HDMI
$0.26
UI_HW_PORT3
UI_HW_PORT1
UI_HW_PORT2
UI_HW_PORT3
HDMI EEPROM
L
L
DDC1, HPD1
Unselected, HPD ALL
H
L
H
H
SEL1
L
DDC3, HPD3
I/O Selected
SEL2
H
DDC2, HPD2
L: HDMI1.3 Compliant Cable
H: 10m 28 AWG Cable
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