LG 42LH3000 / 42LH3010 / 42LH3020 / 42LH3040 (CHASSIS:LD91A) Service Manual ▷ View 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+_HDMI3
2:E13
+5V_ST
D0-_HDMI2
2:E11
DDC_SDA_3
2:E14;AL14
CK+_HDMI2
2:E10
EDID_WP
1:AJ20;AI16;AL12
CEC_REMOTE
K19;K8;AH25
DDC_SDA_2
2:E12;AL19
D1+_HDMI1
2:E9
D2-_HDMI2
2:E12
JP601
EDID_WP
D602
ENKMC2838-T112
A1
C
A2
DDC_SDA_3
DDC_SCL_3
JP603
D1+_HDMI2
2:E11
D0+_HDMI1
2:E8
5V_HDMI_2
DDC_SDA_1
2:E10;K7
JP605
D0-_HDMI3
2:E13
CK-_HDMI3
2:E13
DDC_SCL_1
2:E10;AL9
D1-_HDMI2
2:E11
JP600
5V_HDMI_3
D0+_HDMI2
2:E11
D2+_HDMI3
2:E14
GND
D1-_HDMI1
2:E9
D1-_HDMI3
2:E14
D2-_HDMI3
2:E14
CK-_HDMI1
2:E8
D2+_HDMI1
2:E9
+5V_ST
GND
CK+_HDMI3
2:E13
GND
CEC_REMOTE
K19;X14;AH25
CK-_HDMI2
2:E11
DDC_SCL_3
2:E15;AL13
D0-_HDMI1
2:E9
DDC_SCL_2
D1+_HDMI3
2:E14
DDC_SCL_2
2:E12;AL18
D2-_HDMI1
2:E9
JP606
DDC_SCL_1
2:E10;K7
+5V_ST
CEC_REMOTE
K8;X14;AH25
JP604
D600
ENKMC2838-T112
A1
C
A2
DDC_SDA_2
5V_HDMI_1
D2+_HDMI2
2:E12
CK+_HDMI1
2:E8
JP611
EDID_WP
JP607
5V_HDMI_1
HPD1
Q601
2SC3052
E
B
C
5V_HDMI_2
HPD2
Q602
2SC3052
E
B
C
5V_HDMI_3
HPD3
Q603
2SC3052
E
B
C
IC601
CAT24C02WI-GT3
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
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
R607
0
GND
+3.3V_ST
HDMI_CEC
Q600
SSM6N15FU
OPT
3
DRAIN2
2
GATE1
1
SOURCE1
4
SOURCE2
5
GATE2
6
DRAIN1
D603
MMBD301LT1G
30V
CEC_REMOTE
R625
0
C605
0.1uF
16V
OPT
R627
120K
C600
0.1uF
16V
C601
0.1uF
16V
C602
0.1uF
16V
C603
0.1uF
C604 0.1uF
C607 0.1uF
R600
2K
R601
2K
R602
2K
R603
22
R609
0
R618
0
R619
0
R620
0
R621
0
R622
0
R645
0
R642
0
R640
0
R623
0
R605
0
R617
10K
R616
10K
R615
10K
R613
1K
R614
1K
R612
1K
R606
22
R604
22
R610
22
R611
22
R608
22
R631
OPT
JP602
R646
4.7K
R649
4.7K
R6
2
8
4.
7K
R626
4.7K
R630
4.7K
R629
4.7K
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
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
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
UI_HW_PORT3
UI_HW_PORT1
UI_HW_PORT2
SIDE HDMI (OPT:SIDE_HDMI)
$0.26
(OPT:REAR_HDMI_2EA)
HDMI_CEC
HDMI
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.
0.1uF
C729
50V
0.1uF
C749
50V
0.1uF
C735
50V
SPK_R+
AB11
R734
3.3
C732
22000pF
50V
C746 0.47uF 50V
SPK_R-
AB12
MS_LRCK
2:X21
AMP_VCC
0.01uF
C758
50V
R736
3.3
0.1uF
C728
5
0V
0.01uF
C756
50V
R730
4.7K
0.1uF
C733
50V
0.01uF
C757
50V
L704
DA-8580
EAP38319001
2S
1S
1F
2F
SDA_SUB/AMP
1:L22;11:AG10
SPK_L-
AB11
0.1uF
C750
50V
R737
3.3
R732
4.7K
MS_LRCH
2:X21
SPK_L+
AB10
MS_SCK
2:X21
AUDIO_MASTER_CLK
2:X21
0.1uF
C734
50V
C731
22000pF 50V
+1.8V_AMP
C726 22000pF 50V
+1.8V_AMP
C745 0.47uF 50V
0.1uF
C752
50V
0.1uF
C751
50V
AMP_RST
1:AA21
L705
DA-8580
EAP38319001
2S
1S
1F
2F
0.01uF
C755
50V
R735
3.3
SCL_SUB/AMP
1:L22;11:AG9
R733
4.7K
C716
22000pF
50V
R731
4.7K
+1.8V_AMP
SPK_R-
AE9
SPK_L-
AE5
SPK_L+
AE3
SPK_R+
AE7
HP_ROUT
2:X19
C719
100uF
16V
HP_LOUT
2:X19
IC700
TPA6110A2DGNRG4
3
SHUTDOWN
2
GND
4
IN2-
1
BYPASS
5
VO2
6
VDD
7
VO1
8
IN1-
C718
100uF
16V
Q700
2SC3052
E
B
C
+5V_EARPHONE
P700
WAFER-ANGLE
1
2
3
4
C703 0.22uF 16V
C717
0.22uF
16V
+3.3V
Q701
2SC3052
E
B
C
+3.3V_ST
AMP_VCC
JK700
DJ-S3600LM
BOTTOM_EARPHONE
1
2
3
4
5
+3.3V
HP_DET
SIDE_HP_MUTE
1:AJ19
D708
ENKMC2838-T112
A1
C
A2
SB_MUTE
1:AA19;R15;9:AI24;9:AI25
SB_MUTE
1:AA19;G25;9:AI24;9:AI25
NTP_MUTE
1:AA22
D709
ENKMC2838-T112
A1
C
A2
R722
100
R720
100
R721
100
D704
100V
1N4148W
OPT
D705
100V
1N4148W
OPT
D706
100V
1N4148W
OPT
D707
100V
1N4148W
OPT
D710
5.6V
AMOTECH
D711
5.6V
AMOTECH
L700
BLM18PG121SN1D
L701
BLM18PG121SN1D
C712
33pF
50V
C714
33pF
50V
R710
100
R709
100
R726
12
R727
12
R725
12
R728
12
R716
12
R705
12
R713
12
R719
12
C725
10uF
35V
C736
10uF
35V
+5V_EARPHONE
Q705
2SC3052
E
B
C
R740
0
R703
0
0.1uF
C709
C710
0.1uF
16V
C702 0.1uF
16V
0.1uF
C715
16V
0.1uF
C706
16V
R704
100
C741 1000pF 50V
C707 1000pF
50V
C708 1000pF 50V
C743 1000pF 50V
C742 1000pF 50V
C744 1000pF 50V
C705
100pF
50V
R700
10K
R724 10K
R729
10K
R707 10K
R741
10K
R714
1K
R715
1K
C701 1uF
6.3V
R708
3.3K
R717
33K
OPT
+5V_GENERAL
+5V_EARPHONE
C711
100uF
16V
D700
ENKMC2838-T112
A1
C
A2
R742
10K
R701 10K
R711
20K
R702
20K
R712
20K
R706
20K
IC701
NTP-3100L
EAN60664001
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
DVDD
17
SDATA
18
WCK
19
BCK
20
SDA
21
SCL
22
MONITOR_0
23
MONITOR_1
24
MONITOR_2
25
FAULT
26
VDR2B
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
VDR1B
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
C723
0.1uF
C722
0.1uF
JK701
PEJ026-01
TOP_EARPHONE_out_of_stock
3
TRANSFER[L]
4
BREAK[L]
5
C-LUG-EL
6
C-LUG-ES
7
C-LUG-ER
8
BREAK[R]
9
TRANSFER[R]
10
FIX-TER
L709
120-ohm
L706
120-ohm
L708
120-ohm
L707
120-ohm
C727 0.1uF 16V
C7
1
3
0.
1uF
16V
C7
2
4
0.
1uF
16V
C7
3
0
0.
1uF
16V
C700 1uF 10V
C704 1uF 10V
C760
1uF
10V
R718
100
C721
0.1uF
16V
0.1uF
C720
50V
SPEAKER_L
SPEAKER_R
EARPHONE AMP
2A => 5A
MCLK SDATA WCK BCK TP is necessory
Monitor0_1_2 TP is necessory
AMP
Block Diagram
Block Diagram
RGB
COMPONENT
F-SCART
AV3
BUF_TS_CLK/ERR/SYN/DATA[0]
AV_CVBS_IN
DDR2 SDRAM
(1Gb)
IC300
IC300
NAND Flash
HYNIX
IC102
USB
Digital amp
(NTP3100L)
IC701
COMP_Y/Pb/Pr
SC1_CVBS_IN
SC2_CVBS_IN
I2S
DSUB_ R/G/B
Tuner
(TDFW-G235D1)
TU1000
LCD Panel
- 19/22/26/32/37/42LH2000
- 32/37/42/47LH3000
- 32/37/42/47LH3000
- 32/37/42/47LH4000
74LVC541A
Buffer
IC502
CI Slot
(P500)
74LCX244
Buffer
IC501
PCM_A[0:7]
FE_VMAIN
PCM_A[0:7]
SDDR_D[0:15]
DDR2 SDRAM
(512Mb)
IC301
TDDR_D[0:15]
SDDR_A[0:12]
Mstar S6
LGE3368A
(No-DVIX)
(IC100)
MP6211DH
USB Power
IC402
USB Power
FE_TS_DATA[0:7]
CI_MDI[0:7]
H-SCART
SC1_R/G/B
SC1/2_L/R_IN,
FE_AM_AUDIO,AV_L/R_IN,
COMP_L/R_IN, PC_L/R_IN
FE_AM_AUDIO,AV_L/R_IN,
COMP_L/R_IN, PC_L/R_IN
FE_ VOUT
DTV/MNT_VOUT
TDDR_A[0:12]
TPA6110A
IC700
Head
Phone
RS-232C
MAX3232CDR
IC403
SPDIF
SPDIF_OUT
DSUB_H/VSYNC
HP_L/ROUT
L/R
CI_TS_DATA[0:7]
PCM_D[0:7]
CI_DATA[0:7]
CI_ADDR[0:7]
AUDIO IN
DGB_TX/RX
HPD1/2/3, HDMI_CEC
TMDS[0:7] ( Data, Clock (+/-))
USB_DM/DP
EEPROM
AT24C512
(IC105)
EEPROM
AT24C512
(HDCP)IC107
I2C
LVDS (10 bit)
Serial Flash
IC104
For Triton
Serial Flash
IC103
For Boot
KIA7027
(IC101)
Voltage Detector
74LX1G14C
(IC108)
Schmitt Trigger
Reset
5V_HDMI_1/2/3
HDMI
1/2/3
1/2/3
Block diagram
Main Block
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