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.
0 . 1 u F
C532
+3.3V_NORMAL
POWER_ON/OFF1
0 . 1 u F
16V
16V
C544
0 . 1 u F
C535
10uF
C503
10uF
C539
+1.2V_MTK_CORE
EMMC_VCCQ
0 . 1 u F
C550
10uF
C525
+1.2V_MTK_CORE
0 . 1 u F
C529
+1.2V_MTK_CORE
TP500
3.3V_EMMC
1
R500
0 . 1 u F
16V
16V
C512
0 . 1 u F
C546
10uF
10V
10V
C540
0 . 1 u F
C543
BLM18PG121SN1D
L500
DAC_3V3
+3.3V_NORMAL
BLM18PG121SN1D
L504
+3.3V_NORMAL
VDD3V3
0 . 1 u F
C548
10uF
C500
0 . 1 u F
C510
+1.2V_MTK_CORE
VDD3V3
0 . 1 u F
16V
16V
C522
10uF
10V
10V
C526
BLM18PG121SN1D
L506
+5V_NORMAL
0 . 1 u F
C552
0 . 1 u F
C553
VDD3V3
BLM18PG121SN1D
L501
0 . 1 u F
C501
AVDD_33SB
BLM18PG121SN1D
L502
+1.2V_MTK_CORE
+1.2V_MTK_AVDD
10uF
C505
10uF
C506
+1.2V_MTK_CORE
+1.5V_DDR
AP1117E33G-13
IC501
OUT
IN
ADJ/GND
10uF
C524
LGE2112
IC105
DVSS_51
R2
DVSS_52
R3
DVSS_37
J 4
DVSS_53
R4
DVSS_107
Y4
DVSS_20
F5
DVSS_38
J 5
DVSS_54
R5
DVSS_108
Y5
DVSS_95
W5
DVSS_44
L7
DVSS_46
M7
DVSS_56
R7
DVSS_120
AA5
DVSS_130
AB5
DVSS_43
K7
DVSS_77
U7
DVSS_97
W7
DVSS_13
E9
DVSS_12
E8
DVSS_22
F9
DVSS_28
G14
DVSS_39
J 6
DVSS_57
R15
DVSS_68
T15
DVSS_78
U15
DVSS_87
V15
DVSS_99
W15
DVSS_112
Y15
DVSS_122
AA15
DVSS_132
AB15
DVSS_34
H11
DVSS_58
R16
DVSS_69
T16
DVSS_79
U16
DVSS_88
V16
DVSS_100
W16
DVSS_113
Y16
DVSS_123
AA16
DVSS_133
AB16
DVSS_59
R17
DVSS_70
T17
DVSS_80
U17
DVSS_89
V17
DVSS_114
Y17
DVSS_71
T18
DVSS_90
V18
DVSS_115
Y18
DVSS_72
T19
DVSS_91
V19
DVSS_116
Y19
DVSS_101
W17
DVSS_124
AA17
DVSS_134
AB17
DVSS_60
R18
DVSS_131
AB6
DVSS_35
H19
DVSS_36
H22
DVSS_40
J 1 1
DVSS_41
J 1 2
DVSS_42
J 2 2
DVSS_55
R6
DVSS_62
R20
DVSS_73
T20
DVSS_83
U20
DVSS_92
V20
DVSS_104
W20
DVSS_117
Y20
DVSS_127
AA20
DVSS_137
AB20
DVSS_29
G16
DVSS_63
R21
DVSS_74
T21
DVSS_84
U21
DVSS_93
V21
DVSS_105
W21
DVSS_118
Y21
DVSS_128
AA21
DVSS_138
AB21
DVSS_64
R22
DVSS_75
T22
DVSS_85
U22
DVSS_94
V22
DVSS_106
W22
DVSS_119
Y22
DVSS_129
AA22
DVSS_139
AB22
DVSS_65
R23
DVSS_76
T23
DVSS_86
U23
DVSS_140
AB23
DVSS_96
W6
DVSS_30
G17
DVSS_27
F25
DVSS_109
Y6
DVSS_17
E21
DVSS_25
F21
DVSS_45
L8
DVSS_66
T7
DVSS_7
D11
DVSS_14
E11
DVSS_8
D12
DVSS_18
E22
DVSS_26
F22
DVSS_33
G25
DVSS_136
AB19
DVSS_126
AA19
DVSS_49
P22
DVSS_103
W19
DVSS_82
U19
DVSS_61
R19
DVSS_110
Y7
DVSS_135
AB18
DVSS_125
AA18
DVSS_102
W18
DVSS_81
U18
DVSS_121
AA7
DVSS_47
N22
DVSS_67
T8
DVSS_98
W8
DVSS_111
Y8
DVSS_11
E7
DVSS_21
F8
LGE2112
IC105
VCCK_43
AR7
VCCK_45
AT7
VCCK_47
AU7
VCCK_42
AP8
VCCK_44
AR8
VCCK_46
AT8
VCCK_48
AU8
VCCK_37
AM7
VCCK_39
AN7
VCCK_41
AP7
VCCK_38
AM8
VCCK_40
AN8
VCCK_1
P14
VCCK_9
R14
VCCK_11
T14
VCCK_13
U14
VCCK_14
V14
VCCK_16
W14
VCCK_18
Y14
VCCK_20
AA14
VCCK_22
AB14
VCCK_23
AC14
VCCK_28
AC19
VCCK_2
P15
VCCK_24
AC15
VCCK_3
P16
VCCK_25
AC16
VCCK_15
V23
VCCK_17
W23
VCCK_19
Y23
VCCK_21
AA23
VCCK_31
AC22
VCCK_32
AC23
VCCK_36
AD24
VCCK_8
P23
VCCK_10
R24
VCCK_12
T24
VCCK_33
AC24
VCCK_30
AC21
VCCK_7
P20
VCCK_29
AC20
VCCK_6
P19
VCCK_27
AC18
VCCK_5
P18
VCCK_26
AC17
VCCK_4
P17
VCCK_34
AD18
VCCK_35
AD23
VCC3IO_B_4
AL9
VCC3IO_B_2
AK10
VCC3IO_B_1
AK9
VCC3IO_B_3
AK11
VCC3IO_A_5
H29
VCC3IO_A_7
J 2 9
VCC3IO_A_6
H30
VCC3IO_A_8
J 3 0
VCC3IO_A_3
G31
VCC3IO_A_4
G32
VCC3IO_A_2
F33
VCC3IO_A_1
E34
0 . 1 u F
C545
0 . 1 u F
C536
+1.2V_MTK_CORE
0 . 1 u F
C531
0 . 1 u F
C537
+1.5V_DDR
0 . 1 u F
C547
0 . 1 u F
C533
0 . 1 u F
C514
0 . 1 u F
C520
0 . 1 u F
C527
0 . 1 u F
C508
0 . 1 u F
C523
2 . 2 u F
C504
10uF
10V
10V
C509
VDD3V3
VDD3V3_ETN
BLM18PG121SN1D
L507
10
2 0 1 1 . 0 9 . 2 9
MID_MAIN_3
60mA
5600mA
DECAP FOR SOC (HIDDEN - UCC)
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.
0 . 0 1 u F
50V
C2432
BLM18PG121SN1D
L2407
+1.5V_DDR
+5V_NORMAL
10uF
16V
16V
C2415
1/16W 330K 5%
R2432
MMBT3904(NXP)
Q2406
E
B
C
+3.5V_ST
0 . 1 u F
50V
C2401
BLM18PG121SN1D
L2405
0 . 0 1 u F
50V
C2422
100pF
50V
C2416
0 . 1 u F
16V
16V
C2406
10uF
10V
10V
C2418
1/16W
56K
1%
R2433
BLM18SG121TN1D
L2408
+24V
1uF
10V
10V
C2417
1/16W
15K
5%
R2431
100
R2425
AO3407A
Q2407
G
D
S
0 . 1 u F
16V
16V
C2412
100
R2419
MMBT3906(NXP)
Q2401
1
2
3
10K
R2435
+12V
1uF
25V
25V
C2440
OPT
0 . 1 u F
16V
C2423
100
R2418
OPT
10K
R2408
100K
R2416
OPT
NR8040T3R6N
3.6uH
L2409
INV_CTL
0 . 1 u F
16V
16V
C2429
ERROR_OUT
0
R2420
POWER_16_GND
+3.5V_ST
NR8040T3R6N
3.6uH
L2406
10K
OPT
R2421
PWM_DIM2
4.7K
OPT
R2424
THERMAL
TPS54319TRE
IC2403
1
VIN_1
3
GND_1
7
COMP
9
SS/TR
10
PH_1
11
PH_2
12
PH_3
13
BOOT
14
PWRGD
15
EN
16
VIN_3
5
AGND
8
RT/CLK
6
VSENSE
4
GND_2
2
VIN_2
17
EP[GND]
0
5%
5%
OPT
R2413
+12V
100K
R2417
0 . 1 u F
50V
50V
C2433
0 . 1 u F
16V
16V
C2419
0
POWER_16_VSYNC
R2423
22uF
10V
10V
C2430
PANEL_CTL
0 . 1 u F
16V
16V
C2410
OPT
0 . 1 u F
16V
C2420
POWER_DET
THERMAL
TPS54327DDAR
IC2404
3
VREG5
2
VFB
4
SS
1
EN
5
GND
6
SW
7
VBST
8
VIN
9
[EP]GND
3300pF
50V
50V
C2428
+12V
+3.5V_ST
0 . 1 u F
16V
16V
C2411
PWM_DIM1
+3.3V_NORMAL
0 . 1 u F
16V
16V
C2427
10K
1%
R2439
47K
1
%
R2434
+24V
100pF
50V
50V
C2426
PANEL_VCC
+3.5V_ST
0 . 1 u F
50V
50V
C2443
10K
R2437
A_DIM
0
POWER_24_GND
R2422
56K
1%
R2415
4700pF
50V
C2421
10K
R2442
MTK_EPI
1.8K
R2441
MTK_EPI
+12V
10K
R2430
RL_ON
+3.5V_ST
0 . 1 u F
50V
C2413
10K
R2401
10uF
16V
C2402
3300pF
50V
OPT
C2441
10K
R2403
0
OPT
R2400
2uH
L2404
10uF
16V
C2400
POWER_ON/OFF1
10K
1%
R2406
0 . 1 u F
16V
OPT
C2403
0 . 1 u F
16V
C2404
THERMAL
AOZ1038PI
IC2400
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
NC_1
8
NC_2
9
[EP]LX
+12V
10uF
10V
C2414
10uF
10V
C2409
10uF
10V
C2408
10uF
10V
C2407
+1.2V_MTK_CORE
BLM18PG121SN1D
L2400
22pF
50V
50V
C2445
0 . 1 u F
50V
50V
C2434
+12V
+3.3V_NORMAL
10uF
16V
16V
C2431
10K
1%
R2428
1uF
10V
10V
C2438
0 . 1 u F
C2437
22uF
10V
10V
C2442
3300pF
50V
C2439
10K
R2414
22uF
10V
10V
C2444
100K
R2407
2uH
L2411
+3.3V_NORMAL
33K
1%
R2427
BLM18PG121SN1D
L2410
THERMAL
TPS54425PWPR
IC2405
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
POWER_ON/OFF2_1
POWER_ON/OFF1
POWER_ON/OFF2_2
POWER_ON/OFF2_3
POWER_ON/OFF2_4
POWER_ON/OFF2_3
POWER_ON/OFF2_4
POWER_ON/OFF2_1
POWER_ON/OFF2_3
POWER_ON/OFF2_2
3.3K
R2402
4700pF
50V
C2405
5.6K
1%
R2404
0 . 1 u F
16V
16V
C24001
2.7K
1%
1%
R2410
PD_12V
1.5K
1%
1%
R2411
PD_24V
1.2K
1%
1%
R2409
PD_12V
8.2K
1%
1%
PD_24V
R2412
R2412
10uF
10V
C2446
10uF
10V
C2447
10uF
10V
C2424
10uF
10V
C2425
4 . 7 u F
50V
C2435
0
5%
5%
PD_3.5V
R2429
+3.5V_ST
10uF
10V
10V
C2448
5.6K
MTK_NON_EPI
R2441-*1
33K
MTK_NON_EPI
R2442-*1
10K
R2453
OPT
I2C_SCL5
I2C_SDA5
33
FOR LPB MODEL
R2458
12507WR-08L
FOR LPB MODEL
P2403
1
2
3
4
5
6
7
8
9
33
FOR LPB MODEL
R2459
SMAW200-H24S2
P2401
SLIM_32~55
19
12V
14
GND
9
3.5V
4
24V
18
INV ON
13
GND
8
GND
3
24V
17
12V
12
3.5V
7
GND
2
24V
16
GND/V-sync
11
3.5V
6
GND
1
PWR ON
20
A.DIM
15
GND
10
3.5V
5
GND
21
12V
22
P.DIM1
23
GND/P.DIM2
24
Err OUT
25
FW20020-24S
NORMAL_EXCEPT_32
P2400
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
FM20020-24
P2402
NORMAL_32
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
25
10K
R2426
10K
R2460
22
POWER_24_ERROR_OUT
R2405
1/8W
2K
R2451
PANEL_DISCHARGE_REG
1/8W
2K
R2452
PANEL_DISCHARGE_REG
0
NON_37_LGD
R2462
MMBT3904(NXP)
Q2402
OPT
E
B
C
10K
OPT
R2461
+3.5V_ST
0
R2463
4.7K
R2464
OPT
ZD2401
MLB-201209-0120P-N2
L2401
MLB-201209-0120P-N2
L2402
MLB-201209-0120P-N2
L2403
NCP803SN293
IC2402
R e s e t _ O n s e m i
1
GND
3
VCC
2
RESET
NCP803SN293
IC2401
R e s e t _ O n s e m i
1
GND
3
VCC
2
RESET
APX803D29
I C 2 4 0 2 - * 1
R e s e t _ D i o d e s
1
GND
3
VCC
2
RESET
APX803D29
I C 2 4 0 1 - * 1
R e s e t _ D i o d e s
1
GND
3
VCC
2
RESET
24
MID_POWER
2 0 1 1 . 0 9 . 2 9
Vout=0.827*(1+R1/R2)=1.521V
3A
24V-->3.48V
TYP 1450mA
# 1 6 / # 2 0 / # 2 3
LD - GND OR USE
LE(N.L.D.) - OPEN
LE(N.L.D.) - OPEN
L E ( L . D . ) - U S E
R2
FROM LIPS & POWER B/D
R2
DDR MAIN 1.5V
PANEL_POWER
R1
R1
12V-->3.58V
Power_DET
n o t t o R E S E T a t 8 k V E S D
ST_3.5V-->3.5V
$ 0 . 1 4 5
3A
3A
+5V_Normal
Placed on SMD-TOP
*NOTE 17
R1
R2
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
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 )
+3.3V_NORMAL
MAX 3.4 A
R2
R1
xxLT760H-UA
FOR LPB Download
[To LED DRIVER]
D i o d e s
IR
+3.5V_ST
+3.5V_ST
10K
R4102
OPT
+3.5V_ST
47K
R4104
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.
2SC3052
Q4100
OPT
E
B
C
2SC3052
Q4101
E
B
C
47K
R4103
47K
R4101
OPT
0 . 1 u F
C4102
0 . 1 u F
C4100
100
R4114
12507WR-10L
P4102
1
2
3
4
5
6
7
8
9
10
11
AMOTECH
5.6V
D4101
AMOTECH
5.6V
D4100
1.5K
R4126
BLM18PG121SN1D
L4100
100pF
50V
C4107
CDS3C05HDMI1
5.6V
5.6V
D4106
0 . 1 u F
16V
C4101
AMOTECH
5.6V
D4104
100
R4124
I_SENSOR
0 . 1 u F
16V
OPT
C4103
CDS3C05HDMI1
5.6V
D4105
KEY2
100
R4123
I_SENSOR
KEY1
100
R4113
I2C_SDA2
I2C_SCL2
+3.5V_ST
1000pF
50V
C4104
LED_R
1000pF
50V
C4108
I_SENSOR
0 . 1 u F
16V
C4109
I_SENSOR
0 . 1 u F
16V
OPT
C4110
BLM18PG121SN1D
L4101
I_SENSOR
+3.3V_NORMAL
I2C_SDA3
I2C_SCL3
100
OPT
R4127
100
OPT
OPT
R4128
10K
R4132
760SCA_IR_OPT
IR_OUT_RS232C
22
R4131
760SCA_IR_OPT
10K
1%
R4117
+3.5V_ST
10K
1%
R4118
BLM18PG121SN1D
L4103
BLM18PG121SN1D
L4102
47K
R4107
OPT
10K
R4130
760SCA_IR_OPT
0
R4108
NON_I_SENSOR
10K
OPT
R4109
2SC3052
Q4102
760SCA_IR_OPT
E
B
C
+3.5V_ST
IR & KEY
Z e n e r D i o d e i s
c l o s e t o w a f e r
41
IR / KEY
2 0 1 1 . 0 9 . 2 6
xxLT760H-UA
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