LG 42LT760H-SA (CHASSIS:LJ3AZ) 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.
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.
RCLAMP0502BA
D4303
USB DOWN STREAM
3AU04S-345-ZC-H-LG
JK4304
1
2
3
4
5
10uF
10V
C4321
WIFI
0 . 1 u F
16V
16V
C4320
WIFI
USB_CTL2
USB DOWN STREAM
3AU04S-345-ZC-H-LG
JK4303
1
2
3
4
5
USB_CTL1
22pF
50V
50V
C4332
10K
R4323
3300pF
50V
C4329
/USB_OCD1
1/10W
27K
R4314
100K
R4328
BLM18PG121SN1D
L4302
WIFI
BLM18PG121SN1D
L4305
+5V_USB
10K
OPT
OPT
R4311
0 . 1 u F
16V
16V
C4319
WIFI
22uF
10V
10V
C4334
USB_DM1
22uF
10V
10V
C4333
1uF
10V
10V
C4327
THERMAL
TPS54425PWPR
IC4305
3
VREG5
2
VFB
4
SS
1
VO
6
PG
5
GND
7
EN
8
PGND1
9
PGND2
10
SW1
11
SW2
12
VBST
13
VIN1
14
VIN2
15
[EP]PGND
USB_DP1
10K
R4312
+5V_USB
10uF
10V
C4323
THERMAL
TPS2554
IC4306
3
IN_2
2
IN_1
4
ILIM_SEL
1
GND
5
EN
6
ILIM1
7
ILIM0
8
OUT_1
9
OUT_2
10
FAULT
11
[ E P ]
+3.3V_NORMAL
WIFI_DM
WIFI_DP
1/10W
27K
R4341
OPT
+12V
+3.3V_NORMAL
1/10W
27K
R4300
POWER_ON/OFF2_4
0 . 1 u F
C4328
12507WR-04L
P4301
WIFI
1
VDD
2
DM
3
DP
4
GND
5
.
THERMAL
TPS2554
IC4303
3
IN_2
2
IN_1
4
ILIM_SEL
1
GND
5
EN
6
ILIM1
7
ILIM0
8
OUT_1
9
OUT_2
10
FAULT
11
[ E P ]
+5V_USB
120K
1%
1%
R4330
10uF
16V
16V
C4324
+5V_USB
10uF
10V
C4340
USB_DM2
/USB_OCD2
10K
R4329
10K
R4327
OPT
0 . 1 u F
50V
50V
C4326
1/10W
27K
OPT
R4313
2uH
L4308
RCLAMP0502BA
D4304
USB_DP2
22K
1%
R4331
RCLAMP0502BA
D4300
10uF
10V
C4339
WIFI
+5V_USB
43
USB3_HUB_WiFi
2 0 1 1 . 0 9 . 2 9
xxLT760H-UA
USB_WIFI
For EMI
DVR Ready
MAX 0.4A
V o u t = ( 0 . 7 6 3 + 0 . 0 0 1 7 * V o u t . s e t ) * ( 1 + R 1 / R 2 ) = 4 . 9 8 V
4A
USB1
To SOC
MAX 1.8A
R1
USB2
+5V_USB FOR USB
R2
To SOC
MAX 1.8A
DVR Ready
To SOC
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.
1N4148W
100V
OPT
D5402
100
R5402
0 . 1 u F
50V
50V
C5421
12
R5411
0 . 4 7 u F
50V
C5434
33pF
50V
50V
C5408
12
R5407
1000pF
50V
C5403
100
R5405
3 . 3
OPT
R5406
12
R5413
100
R5403
12
R5414
0 . 1 u F
50V
50V
C5419
1uF
25V
25V
C5427
22000pF
50V
C5425
22000pF
50V
C5416
10uF
35V
35V
C5422
0 . 1 u F
50V
C5436
+3.3V_NORMAL
22000pF
50V
50V
C5426
NRS6045T100MMGK
10.0uH
L5402
12
R5412
10uF
35V
C5423
0 . 1 u F
50V
C5400
390pF
50V
C5432
0 . 1 u F
50V
C5437
0 . 1 u F
50V
50V
C5418
12
R5409
0 . 1 u F
50V
C5401
SPK_L-
100pF
50V
C5402
33pF
50V
50V
C5406
10uF
10V
C5405
1N4148W
100V
OPT
D5400
1000pF
50V
C5404
390pF
50V
C5430
390pF
50V
C5429
NRS6045T100MMGK
10.0uH
L5405
SPK_R-
+24V_AMP
NRS6045T100MMGK
10.0uH
L5403
0 . 1 u F
16V
C5411
AUD_MASTER_CLK
0 . 1 u F
50V
C5438
SPK_R-
AUD_SCK
1N4148W
100V
OPT
D5401
3.3K
R5404
AUD_LRCK
1000pF
50V
C5415
10K
R5401
I2C_SDA1
0 . 1 u F
16V
C5413
AUD_LRCH
BLM18PG121SN1D
L5401
+24V_AMP
SPK_R+
390pF
50V
C5431
+24V_AMP
1N4148W
100V
OPT
D5403
10uF
10V
10V
C5414
OPT
12
R5408
1uF
25V
25V
C5433
NRS6045T100MMGK
10.0uH
L5404
SPK_L-
0 . 4 7 u F
50V
C5435
1uF
25V
25V
C5428
I2C_SCL1
10uF
10V
C5409
SPK_L+
WAFER-ANGLE
P5400
1
2
3
4
MAIN_AMP_MUTE
0 . 1 u F
50V
50V
C5439
22000pF
50V
C5417
10K
R5400
12
R5410
SPK_R+
0 . 1 u F
16V
C5412
+24V
10uF
10V
OPT
C5410
0 . 1 u F
50V
50V
C5420
SPK_L+
0 . 0 1 u F
50V
50V
OPT
C5424
MMBT3904(NXP)
Q5400
E
B
C
4 . 7 u F
10V
C5407
5.1K
R5418
5.1K
R5415
5.1K
R5416
5.1K
R5417
MAIN_AMP_RESET
33
R5421
10K
R5422
THERMAL
NTP-7500L
IC5400
1
AGND_PLL
2
AVDD_PLL
3
DVDD_PLL
4
LF
5
DGND_PLL
6
GND_1
7
DGND
8
DVDD
9
SDATA
10
WCK
11
BCK
12
SDA
13
SCL
14
/FAULT
15
MONITOR0
16
MONITOR1
17
MONITOR2
18
BST2B
19
PGND2B
20
OUT2B_1
21
OUT2B_2
22
PVDD2_1
23
PVDD2_2
24
PVDD2_3
25
OUT2A_1
26
OUT2A_2
27
PGND2A
28
BST2A
29
VDR2
30
AGND
31
VCC_5
32
VDR1
33
BST1B
34
PGND1B
35
OUT1B_1
36
OUT1B_2
37
PVDD1_1
38
PVDD1_2
39
PVDD1_3
40
OUT1A_1
41
OUT1A_2
42
PGND1A
43
BST1A
44
/RESET
45
AD
46
GND_IO
47
CLK_I
48
VDD_IO
49
[EP]
+3.5V_ST
MLB-201209-0120P-N2
L5400
SPEAKER_R
DUAL COMPONENT
Q1801
0x54
SPEAKER_L
1ST : 0TRIY80001A 2ND : 0TR387500AA
54
AMP_NEO
2 0 1 1 . 0 4 . 3 0
From SOC
xxLT760H-UA
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.
10pF
C601
OPT
AV_L_IN_SOC
100
R617
75
1%
1%
R604
AV_CVBS_IN_SOC
0 . 0 4 7 u F
C616
AV_R_IN_SOC
470K
OPT
OPT
R601
470K
OPT
R602
10uF
16V
16V
C610
10uF
16V
16V
C611
330pF
50V
50V
OPT
C603
330pF
50V
50V
OPT
C602
120-ohm
R611
100pF
C607
30K
R625
30K
R626
100pF
50V
50V
C608
100pF
50V
50V
C609
TP600
TU_CVBS
120-ohm
L1101
220pF
50V
50V
OPT
C1101
12K
R1108
5.6V
VA1101
5.6V
VA1102
5.6V
D1102
5.5V
VA1100
+3.3V_NORMAL
5.6V
OPT
D1103
10K
R1105
1K
R1104
10K
R1103
5.6V
D1101
75
R1100
10K
R1106
30V
D1100
12K
R1107
AV_DET
120-ohm
L1100
5.6V
VA1103
330pF
50V
C1103
330pF
50V
50V
C1104
47pF
50V
50V
C1100
470K
R1102
470K
R1101
P P J 2 3 3 - 0 1
JK1100
4A
[YL]O-SPRING
5A
[YL]E-LUG
3A
[YL]CONTACT
4B
[WH]C-LUG
5C
[RD]E-LUG
4C
[RD]O-SPRING
3C
[RD]CONTACT
18pF
50V
50V
C1102
OPT
18pF
50V
50V
C1105
2 0 1 1 . 1 1 . 2 1
11
MID_MAIN_SCART
PLACE AT MAIN SOC SIDE
READY FOR FILTER (EMI)
L-MONO
Rear AV
FOR ESD
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.
DDC_SDA_2_JACK
100
R3314
5V_HDMI_3_JACK
CEC_REMOTE
D1-_HDMI2_JACK
5V_HDMI_2_JACK
47K
R3324
1K
R3316
1K
R3317
HDMI_HPD_4_JACK
0 . 1 u F
16V
C3303
D2+_HDMI2_JACK
CK-_HDMI2_JACK
D2+_HDMI4_JACK
47K
R3326
100K
R3313
0 . 1 u F
16V
C3301
47K
R3339
D0-_HDMI4_JACK
47K
R3337
DDC_SCL_2_JACK
D2-_HDMI4_JACK
100K
R3307
5V_HDMI_2_JACK
HDMI_HPD_2_JACK
5V_HDMI_4_JACK
1K
R3311
+5V_NORMAL
0 . 1 u F
16V
C3302
47K
R3338
DDC_SCL_4_JACK
5V_HDMI_4_JACK
DDC_SDA_2_JACK
D0+_HDMI4_JACK
CK+_HDMI2_JACK
4.7K
R3318
100
R3308
D1+_HDMI2_JACK
100
R3309
47K
R3340
D0-_HDMI2_JACK
DDC_SDA_3_JACK
CK-_HDMI4_JACK
D0+_HDMI2_JACK
CK+_HDMI4_JACK
DDC_SCL_2_JACK
1K
R3310
DDC_SCL_4_JACK
DDC_SCL_3_JACK
D2-_HDMI2_JACK
100
R3315
+5V_NORMAL
DDC_SDA_4_JACK
D1+_HDMI4_JACK
DDC_SDA_4_JACK
D1-_HDMI4_JACK
+5V_NORMAL
CEC_REMOTE
4.7K
R3312
MMBT3904(NXP)
Q3301
E
B
C
MMBT3904(NXP)
Q3302
E
B
C
5V_HDMI_3_JACK
D0-_HDMI3_JACK
MMBT3904(NXP)
Q3303
E
B
C
CK+_HDMI3_JACK
CEC_REMOTE
HDMI_HPD_3_JACK
D2-_HDMI3_JACK
100
R3329
DDC_SDA_3_JACK
D1+_HDMI3_JACK
100K
R3327
4.7K
R3336
D1-_HDMI3_JACK
100
R3328
D2+_HDMI3_JACK
DDC_SCL_3_JACK
D0+_HDMI3_JACK
CK-_HDMI3_JACK
1K
R3331
1K
R3330
120K
R3303
CEC_REMOTE
27K
R3302
RUE003N02
Q3300
HDMI_CEC_FET_ROHM
S
D
G
+3.5V_ST
HDMI_CEC
BAT54_SUZHO
D3304
YKF45-7058V
JK3301
14
NC
13
CEC
5
DATA1_SHIELD
20
SHIELD
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
YKF45-7058V
JK3302
14
NC
13
CEC
5
DATA1_SHIELD
20
SHIELD
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
RSD-105156-100
JK3303
14
RESERVED
13
CEC
5
TMDS_DATA1_SHIELD
20
BODY_SHIELD
12
TMDS_CLK-
11
TMDS_CLK_SHIELD
2
TMDS_DATA2_SHIELD
19
HOT_PLUG_DETECT
18
VDD[+5V]
10
TMDS_CLK+
4
TMDS_DATA1+
1
TMDS_DATA2+
17
DDC/CEC_GND
9
TMDS_DATA0-
8
TMDS_DATA0_SHIELD
3
TMDS_DATA2-
16
SDA
7
TMDS_DATA0+
6
TMDS_DATA1-
15
SCL
MMBD6100
D3302
D3302
A2
C
A1
MMBD6100
D3301
D3301
A2
C
A1
MMBD6100
D3303
D3303
A2
C
A1
SI1012CR-T1-GE3
Q3300-*1
HDMI_CEC_FET_VISHAY
S
D
G
HDMI_ARC
0
R3300
0
R3342
OPT
0
R3343
OPT
4.7K
R3345
OPT
4.7K
OPT
R3346
4.7K
OPT
R3347
HDMI_HPD_2_JACK
+3.5V_ST
0 . 1 u F
C3306
HPD_CTL
0
R3375
OPT
NLASB3157DFT2G
IC3301
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
NEC_HPD
MTK_HPD
UI : HDMI2
UI : HDMI3
UI : HDMI1
33
HDMI 4
2 0 1 1 . 0 9 . 2 9
For CEC
From HDMI Connector
To NEC
xxLT760H-UA
R3300 MTK Recommend : 0 Ohm
L
MTK_HPD
B 1 - A
HPD_CTLCONNECTION
H
B 0 - A
HPD SWITCH
NEC_HPD
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